Diamond
Diamond BOOST Travel Change
This is a guide to changing the travel on your BOOST Diamond. If you have a NON-BOOST Diamond, you can find the guide in the lower tab.
The Diamond Boost 27.5 version has a minimum travel of 140mm’s, and a max travel of 170mm’s. The Diamond Boost 29 version has a minimum travel of 130mm’s and a max travel of 160mm’s. DO NOT go outside of these travel ranges!
Travel adjustment is done by changing the spacers inside the air cartridge. This task should be performed by an Authorized DVO Suspension service center or a qualified suspension mechanic. Below is a video that will show you how to perform the travel adjust.
WARNING! PLEASE MAKE SURE THAT YOU RELEASE ALL THE AIR OUT OF THE AIR CARTRIDGE BEFORE PERFORMING THIS TASK. SERIOUS INJURY MAY OCCUR IF YOU DO NOT REMOVE ALL AIR FIRST. YOU HAVE BEEN WARNED!
Cartridge Removal an Installation Video Below:
Diamond NON BOOST Travel Change
The Diamond non-boost fork travel can be configured to 140mm, 150mm and 160mm. Travel adjustment is done by changing the spacers inside the air cartridge. This task should be performed by an Authorized DVO Suspension service center or a qualified suspension mechanic. Below is a video and a step by step PDF guide that show you how to perform the travel adjust.
WARNING! PLEASE MAKE SURE THAT YOU RELEASE ALL THE AIR OUT OF THE AIR CARTRIDGE BEFORE PERFORMING THIS TASK. SERIOUS INJURY MAY OCCUR IF YOU DO NOT REMOVE ALL AIR FIRST. YOU HAVE BEEN WARNED!
Click here for PDF Diamond Non-Boost Travel Change Guide
Service Intervals
Terrain, location and riding ability can greatly affect the interval in which maintenance should be performed. Always inspect your products, and lean towards caution if maintenance is in question. When in doubt, consult a qualified bicycle mechanic, or contact DVO Suspension directly.
| Maintenance | Interval |
|---|---|
| Clean Stanchion Tubes | Every ride |
| Check Air Pressure | Every ride |
| Inspect Stanchion Tube for Scratches | Every ride |
| Check Torque Settings | 25 hours |
| Remove Lowers, Clean/Inspect Bushing & Change Oil | 50 hours |
| Service Air Spring Assembly | 100 hours |
| Service Damper Cartridge | 100 hours |
Full Damper Service
Damper Bleed
How To Change Oil & Seals
Air Spring Service
Click the link below for the DIAMOND NON BOOST Guide
Click link to view PDF Diamond Air Spring Service Guide
The BOOST version is coming soon, hang tight!
Torque Specs
We recommend all DVO Suspension service(s) should be performed by a qualified bicycle mechanic. It is very important that all bolts and assemblies are torqued to DVO Specifications to ensure proper installation and rider safety. If you have any questions regarding torque specifications that is not shown below please contact support@dvosuspension.com.
| Part | Torque Specification |
|---|---|
| Cable Guide Bolt | 3 N.m / 26.5 in.lbf |
| Fender Mount Bolt | 3 N.m / 26.5 in.lbf |
| Fender Snap-In Bolts | 7 N.m / 62 in lbf |
| Compression Loader | 9 N. m / 80 in lbf |
| Top Plug Air Cartridge | 15 N.m / 132 in.lbf |
| OTT Foot Nut | 10 N.m / 88 in.lbf |
| Top Plug Damper Cartridge | 15 N.m / 132 in.lbf |
| Rebound Foot Nut | 10 N.m / 88 in.lbf |
Crash & Visual Inspection
After a crash, do not ride your bicycle, if any one of the following test criteria is not passed! Riding your bike without eliminating any defect or carrying out the necessary adjustments can result in an accident, serious injury or even death.
- After a crash, Do you notice any cracks, dents, bent or tarnished parts of your suspension fork or any other part of your bicycle? If so, please contact a trained and qualified bicycle mechanic to check your fork and/or complete bike.
- Can you notice any oil leaking out of your fork? Check hidden areas like behind the fork guard under the crown and main seals. If so, please consult a trained and qualified bicycle mechanic to check your fork or bike.
- Make sure your wheels are perfectly centered in order to avoid any contact with suspension fork or brake system. Check and see if your handlebars are aligned with the front wheel
- If the wheel is not aligned with your handlebars, please inspect the fork for damage and re-adjust fork in the clamps. Refer to fork installation guide for proper set-up and torque specs.
Spare Parts List
| Service & Tuning Kits | Part Number |
|---|---|
| Seal Kit | 1439016 |
| Air Piston Kit | 1439015 |
| Shim Kit | 1429007 |
Click on image to view full size
| Reference # | Part Number | Description |
|---|---|---|
| 1 | 1439002 | Damper Complete |
| 2 | 1439003 | Comp Assembly |
| 3 | 1439004 | Rebound Assembly |
| 4 | 1439005 | Rebound Footnut Assy |
| 5 | 1439006 | Air Cartridge Complete |
| 6 | 1439007 | Air Shaft Assy |
| 7 | 1439008 | Damper End Cap |
| 8 | 1439009 | Fender Kit |
| 9 | 1439011 | Axle |
| 10 | 1439012 | Air Spring Foot Nut Assy |
| 11 | 1439013 | Bladder Kit |
| 12 | 1439015 | Air Piston Kit |
| 13 | 1439016 | Seal Kit |
| 14 | 1439017 | Travel Reduction Kit |
| 15 | 1439018 | Damper Knob & Detent Kit |
| 16 | 1439019 | Bleed Screw & O-Ring |
| 17 | 1439020 | Cable Guide & Screw |
| 18 | 1439021 | Air Cap |
| 19 | 1439001-TC704 | Upper Assembly Green |
| 19 | 1439001-YS727 | Upper Assembly Black |
| 20 | 1439100-TC704 | Bottom Case Assembly – 275 – Green |
| 20 | 1439100-YS727 | Bottom Case Assembly – 275 – Black |
| 20 | 1549100-TC704 | Bottom Case Assembly – 29″ – Green |
| 20 | 1549100-YS727 | Bottom Case Assembly – 29″ – Black |
| 1439010-black | Diamond Decal Set Black 275 | |
| 1549010-black | Diamond Decal Set Black 29″ |
Owner’s Manual
Diamond Tuning
Topaz
Emerald
Diamond
Topaz
Topaz
We recommend all DVO Suspension service should be performed by a qualified bicycle mechanic. Terrain, location and riding ability can greatly affect the interval in which maintenance should be performed. Always inspect your products, and lean towards caution if maintenance is in question. When in doubt, consult a qualified bicycle mechanic, or contact DVO Suspension directly.[/box]
Air Pressure
Setting the air pressure in the DVO Diamond is setting the spring rate for your fork. This is what is going to make the fork firmer or softer. Below is a base setting chart for air pressure to get you started. Set your pressure to the recommended PSI then check your SAG point. If you are sagging too much, add some air pressure, if you’re sagging too little, remove air pressure.
Proper Set Up
The Diamond uses an external negative spring adjust (OTT) to tune the beginning of the travel (sensitivity of the fork). Once you get into the mid-stroke of the fork, the air spring (air pressure) is active. This controls your mid-stroke support and your bottom out. In simpler terms, set your air pressure for your mid-stroke and bottom out then set your OTT to fine tune how it feels off the top.
How do I know how much OTT is right for my air pressure?
Lighter riders (lower air pressure) will use less OTT. (less sensitive) Heavier riders will need more OTT (more sensitive). The reason for this is because the OTT is there to counter-act the forces of a higher air pressure so you don’t loose small bump sensitivity. When you are using a lower air pressure, you don’t need as much to counter-act the air pressure. If you run too much OTT with a light air pressure, the fork will suck itself down and you will loose travel.
View one of the lower tabs to learn more about your OTT
To access the air valve you must remove the air spring cap. Attach your shock pump securely and inflate the air spring to the recommended air pressure. After you have added the proper amount of air pressure remember to securely replace the air spring cap so that no dirt or moisture can get inside.
 Access air valve by removing air cap |
 Attach shock pump to air valve and inflate to recommended pressure or proper sag is achieved |
Air Pressure Range: 90-170psi
| Rider Weight | Air Pressure |
| 120-139lbs | 54-63kg | 90-100psi |
| 140-159lbs | 64-72kg | 100-110psi |
| 160-179lbs | 73-81kg | 110-125psi |
| 180-199lbs | 82-90kg | 125-130psi |
| 200-219lbs | 91-100kg | 130-135psi |
| 220-239lbs | 100-108kg | 135-140psi |
| 240+lbs | 109kg+ | 140-170psi |
Suspension Terms & Definitions
Base Valve
Bottoming Out
Closed Cartridge Dampers
Compression Damping
Fork Oil Level
Free Sag
High-Speed Damping
Low-Speed Damping
Mid-Valve
Negative Spring
Open Bath Dampers
Packing
Platform Damping
Rebound Damping
Spring Preload
Spring Type
Stiction
Twin Tube Dampers
Valving
Base Valve
Base valves are located at the base of the fork leg or on the shock’s reservoir and generally function to control high speed compression. Base valves or “BV” are fixed & the piston that is attached to a shaft is referred to as the mid-valve or “MV”. Both forks and shocks can have a “BV” and a “MV”.
Bottoming Out
When your suspension reaches the end of its travel on an impact. You generally want to reach full bottom on occasion but NOT all the time. Continual bottoming can wreak havoc on the suspension system leading to breakage.
Closed Cartridge Dampers
Closed Cartridge Dampers are the opposite of an Open Bath Damper, in a closed system the oil solely contained within a cartridge tube and does not flow into the fork leg. Therefore, additional oil or lubricant is added to the inside of the leg to lubricate the seals and bushings.
Compression Damping
This is what gives your bike it’s feeling of plushness, or stiffness. Compression determines how fast the suspension can compress when hitting a bump. If your suspension is too “stiff”, the system won’t compress fast enough to absorb a bump force. When there is not enough damping, the bike has soft, mushy feeling to it and will compress through its travel with little damping resistance.
Fork Oil Level
The level of oil inside the fork. It’s typically measured in cc’s by fully compressing the fork without the spring installed. It is used in tuning the amount of air contained inside the fork. Since compressing air acts like a spring, raising the oil level leaves less room for air, resulting in a rising rate throughout the fork’s travel.
Free Sag
The amount the bike settles under its own weight without the rider. With mountain bikes becoming lighter and lighter, free sag is really not a critical tuning element but still worth mentioning.
High-Speed Damping
Damping feature that controls fast suspension movements. High-speed damping comes into effect on fast, rough, technical trails, g-outs, hard landings. HSD refers to the shaft speed of the suspension and not the actual riding speed. HSD is controlled through a high speed oil circuit best located in the base valve.
Low-Speed Damping
Damping feature to control slower vertical movements such as climbing or slower paced trails and bumpy whoop sections. A good example of low speed is rolling slowly over a large rock and riding to its downside, this is where the suspension will fully compress but at a slower rate and low speed compression circuit comes into play. LSD refers to the shaft speed of the suspension and not the actual riding speed. LS damping is best controlled through a low speed oil circuit and or shim stack.
Mid-Valve
Mid valves are located on the piston shaft and function in the middle part of the stroke. Mid valves can play an important function in keeping a long travel fork from diving too far into its travel. Mid valves “”MV” function when oil passes through the “MV” from one side of the chamber to the other. The rebound valve is also located on the “MV”.
Negative Spring
A negative spring functions to control the return of the suspension when it reaches full extension. Negative springs can be air, coil spring, rubber bumper or a combination of both. A negative spring also functions to soften the “top out feel” when the wheel/suspension rapidly extends and it also helps initiate compression providing a smoother or more sensitive initial feel. An adjustable negative spring offers the greatest tuning range for riders weight, for example a heavy rider will need a higher or stiffer spring to resist pre-compression, but the high spring rate may also completely compress the negative spring rendering it ineffective to control top out.
Open Bath Dampers
Open Bath refers to a cartridge that is NOT closed and allows oil to flow from the inside of the damper to the outside of the cartridge or inside of the fork legs. Open Bath Dampers use oil for damping, lubrication, cooling, and end stroke “ramp up” or “progression”. But the downside of all this oil is the added weight of all the excess oil that is used to fill the entire fork leg.
Packing
An issue caused from too much rebound damping. When a series of bumps are encountered, the suspension doesn’t rebound fast enough to absorb the next bump. The suspension keeps compressing more and more after each bump and it gives the rider a very harsh feeling and even loss of traction and control because the wheels no longer follows the contour of the terrain.
Platform Damping
A platform is generally referred to as resistance to initial suspension compression usually generated by pedaling or rider induced forces. A platform can be achieved by various methods and usually the best way to limit suspension “bobbing” is to restrict oil flow through the low speed circuit. Depending on what technology you have and there are various designs out there, choking off the low speed circuit can be achieved by either adjusting a pressure spring on the shim stack, adjusting the depth of a bleed needle or changing the size of an orifice via a slide. These are just a few of the most common methods to deliver platform damping feel to improve pedaling efficiency.
Rebound Damping
Once your suspension has hit a bump and compresses, now its time for your rebound damping to kick in. Rebound controls how fast the fork extends back from compression to keep the wheel on the ground. Rebound can affect your traction as well. Too much rebound damping will keep the suspension compressed when it should be extending to stay on the ground on the downside of a bump, and the wheel will loose contact with the ground. This is called “Packing”. Too little rebound damping will cause the suspension to “bounce” and “hop” also causing a loss of traction and control. Proper rebound control is equally important as compression and it is very important to properly tune this performance feature. The rebound valve is best located on the “MV” with a tapered shim stack controlling oil flow. Damping systems that use oriface or small holes to control damping simply cannot control the dynamics of high performance suspension.
Spring Preload
The preload ring or collar compresses the shock or fork spring and either shortens or extends the spring to its original length. Preload is used to adjust the suspension to the correct range of operation within the suspension’s travel- more spring preload will the raise the bike up and less preload will lower it.
Spring Type
Springs can either be coil or air and both are widely used in mountain bike suspension systems. Springs work to resist pre-compression of the suspension under the riders weight and is independent of the compression system which refers to damping. Too stiff of a spring rate delivers a harsh and uncontrolled feel, if your spring rate is too soft, the suspension will sit too far into its travel and will feel mushy and easily bottom out . Its important to have the correct spring rate for each rider and setting up “SAG” will determine whether you have the correct rate or not.
Stiction
Or static friction, is a term that describes friction that occurs from parts rubbing or gliding across one another. For example, on both the rebound and compression stroke, the stanchion tubes must glide against the bushings, o-rings, seals, and other parts. The parts that come in contact with one another create friction and when a bending load is applied the stiction can increase causing the suspension to bind and feel notchy. Stiction can also dramatically increase after seals become dry resulting in the loss of small bump sensitivity.
Twin Tube Dampers
Twin Tube systems generally combine the technology of an “Open Bath” Damper and a “Closed Cartridge” system. With a Twin Tube design, the cartridge damper is inside of a tube (hence twin tube) allowing oil to flow from the cartridge damper into and from the twin tube providing additional oil flow and damping performance without the added weight of “excess” oil that is needed to fill the fork leg.
Valving
The mechanical hardware that creates compression or rebound damping. Valving is a combination of check valves, holes, ports, shims, springs, etc. The best valving arrises out of piston with a series of tapered shim stacks which are very thin high quality steel “washers” that when combined together produce a smooth yet linear flex pattern when oil flows around them. Shims provide the resistance to the oil flowing through the piston at various speeds. The lower amount of shims used typically means the damping quality is less. Systems that use one or two shims deliver a harsh feel on high speed hits, unfortunately, many so-called high performance suspension designs use very few shims and/or only small holes to control damping forces. If your clickers are ineffective or have a very small range, this is due to improper piston & shim stack design.
Owner’s Manual
Diamond Tuning
Topaz
Emerald
Diamond
Topaz
Topaz
We recommend all DVO Suspension service should be performed by a qualified bicycle mechanic. Terrain, location and riding ability can greatly affect the interval in which maintenance should be performed. Always inspect your products, and lean towards caution if maintenance is in question. When in doubt, consult a qualified bicycle mechanic, or contact DVO Suspension directly.[/box]
Air Pressure
Setting the air pressure in the DVO Diamond is setting the spring rate for your fork. This is what is going to make the fork firmer or softer. Below is a base setting chart for air pressure to get you started. Set your pressure to the recommended PSI then check your SAG point. If you are sagging too much, add some air pressure, if you’re sagging too little, remove air pressure.
Proper Set Up
The Diamond uses an external negative spring adjust (OTT) to tune the beginning of the travel (sensitivity of the fork). Once you get into the mid-stroke of the fork, the air spring (air pressure) is active. This controls your mid-stroke support and your bottom out. In simpler terms, set your air pressure for your mid-stroke and bottom out then set your OTT to fine tune how it feels off the top.
How do I know how much OTT is right for my air pressure?
Lighter riders (lower air pressure) will use less OTT. (less sensitive) Heavier riders will need more OTT (more sensitive). The reason for this is because the OTT is there to counter-act the forces of a higher air pressure so you don’t loose small bump sensitivity. When you are using a lower air pressure, you don’t need as much to counter-act the air pressure. If you run too much OTT with a light air pressure, the fork will suck itself down and you will loose travel.
View one of the lower tabs to learn more about your OTT
To access the air valve you must remove the air spring cap. Attach your shock pump securely and inflate the air spring to the recommended air pressure. After you have added the proper amount of air pressure remember to securely replace the air spring cap so that no dirt or moisture can get inside.
|
Access air valve by removing air cap |
Attach shock pump to air valve and inflate to recommended pressure or proper sag is achieved |
Air Pressure Range: 90-170psi
| Rider Weight | Air Pressure |
| 120-139lbs | 54-63kg | 90-100psi |
| 140-159lbs | 64-72kg | 100-110psi |
| 160-179lbs | 73-81kg | 110-125psi |
| 180-199lbs | 82-90kg | 125-130psi |
| 200-219lbs | 91-100kg | 130-135psi |
| 220-239lbs | 100-108kg | 135-140psi |
| 240+lbs | 109kg+ | 140-170psi |
Suspension Terms & Definitions
Base Valve
Bottoming Out
Closed Cartridge Dampers
Compression Damping
Fork Oil Level
Free Sag
High-Speed Damping
Low-Speed Damping
Mid-Valve
Negative Spring
Open Bath Dampers
Packing
Platform Damping
Rebound Damping
Spring Preload
Spring Type
Stiction
Twin Tube Dampers
Valving
Base Valve
Base valves are located at the base of the fork leg or on the shock’s reservoir and generally function to control high speed compression. Base valves or “BV” are fixed & the piston that is attached to a shaft is referred to as the mid-valve or “MV”. Both forks and shocks can have a “BV” and a “MV”.
Bottoming Out
When your suspension reaches the end of its travel on an impact. You generally want to reach full bottom on occasion but NOT all the time. Continual bottoming can wreak havoc on the suspension system leading to breakage.
Closed Cartridge Dampers
Closed Cartridge Dampers are the opposite of an Open Bath Damper, in a closed system the oil solely contained within a cartridge tube and does not flow into the fork leg. Therefore, additional oil or lubricant is added to the inside of the leg to lubricate the seals and bushings.
Compression Damping
This is what gives your bike it’s feeling of plushness, or stiffness. Compression determines how fast the suspension can compress when hitting a bump. If your suspension is too “stiff”, the system won’t compress fast enough to absorb a bump force. When there is not enough damping, the bike has soft, mushy feeling to it and will compress through its travel with little damping resistance.
Fork Oil Level
The level of oil inside the fork. It’s typically measured in cc’s by fully compressing the fork without the spring installed. It is used in tuning the amount of air contained inside the fork. Since compressing air acts like a spring, raising the oil level leaves less room for air, resulting in a rising rate throughout the fork’s travel.
Free Sag
The amount the bike settles under its own weight without the rider. With mountain bikes becoming lighter and lighter, free sag is really not a critical tuning element but still worth mentioning.
High-Speed Damping
Damping feature that controls fast suspension movements. High-speed damping comes into effect on fast, rough, technical trails, g-outs, hard landings. HSD refers to the shaft speed of the suspension and not the actual riding speed. HSD is controlled through a high speed oil circuit best located in the base valve.
Low-Speed Damping
Damping feature to control slower vertical movements such as climbing or slower paced trails and bumpy whoop sections. A good example of low speed is rolling slowly over a large rock and riding to its downside, this is where the suspension will fully compress but at a slower rate and low speed compression circuit comes into play. LSD refers to the shaft speed of the suspension and not the actual riding speed. LS damping is best controlled through a low speed oil circuit and or shim stack.
Mid-Valve
Mid valves are located on the piston shaft and function in the middle part of the stroke. Mid valves can play an important function in keeping a long travel fork from diving too far into its travel. Mid valves “”MV” function when oil passes through the “MV” from one side of the chamber to the other. The rebound valve is also located on the “MV”.
Negative Spring
A negative spring functions to control the return of the suspension when it reaches full extension. Negative springs can be air, coil spring, rubber bumper or a combination of both. A negative spring also functions to soften the “top out feel” when the wheel/suspension rapidly extends and it also helps initiate compression providing a smoother or more sensitive initial feel. An adjustable negative spring offers the greatest tuning range for riders weight, for example a heavy rider will need a higher or stiffer spring to resist pre-compression, but the high spring rate may also completely compress the negative spring rendering it ineffective to control top out.
Open Bath Dampers
Open Bath refers to a cartridge that is NOT closed and allows oil to flow from the inside of the damper to the outside of the cartridge or inside of the fork legs. Open Bath Dampers use oil for damping, lubrication, cooling, and end stroke “ramp up” or “progression”. But the downside of all this oil is the added weight of all the excess oil that is used to fill the entire fork leg.
Packing
An issue caused from too much rebound damping. When a series of bumps are encountered, the suspension doesn’t rebound fast enough to absorb the next bump. The suspension keeps compressing more and more after each bump and it gives the rider a very harsh feeling and even loss of traction and control because the wheels no longer follows the contour of the terrain.
Platform Damping
A platform is generally referred to as resistance to initial suspension compression usually generated by pedaling or rider induced forces. A platform can be achieved by various methods and usually the best way to limit suspension “bobbing” is to restrict oil flow through the low speed circuit. Depending on what technology you have and there are various designs out there, choking off the low speed circuit can be achieved by either adjusting a pressure spring on the shim stack, adjusting the depth of a bleed needle or changing the size of an orifice via a slide. These are just a few of the most common methods to deliver platform damping feel to improve pedaling efficiency.
Rebound Damping
Once your suspension has hit a bump and compresses, now its time for your rebound damping to kick in. Rebound controls how fast the fork extends back from compression to keep the wheel on the ground. Rebound can affect your traction as well. Too much rebound damping will keep the suspension compressed when it should be extending to stay on the ground on the downside of a bump, and the wheel will loose contact with the ground. This is called “Packing”. Too little rebound damping will cause the suspension to “bounce” and “hop” also causing a loss of traction and control. Proper rebound control is equally important as compression and it is very important to properly tune this performance feature. The rebound valve is best located on the “MV” with a tapered shim stack controlling oil flow. Damping systems that use oriface or small holes to control damping simply cannot control the dynamics of high performance suspension.
Spring Preload
The preload ring or collar compresses the shock or fork spring and either shortens or extends the spring to its original length. Preload is used to adjust the suspension to the correct range of operation within the suspension’s travel- more spring preload will the raise the bike up and less preload will lower it.
Spring Type
Springs can either be coil or air and both are widely used in mountain bike suspension systems. Springs work to resist pre-compression of the suspension under the riders weight and is independent of the compression system which refers to damping. Too stiff of a spring rate delivers a harsh and uncontrolled feel, if your spring rate is too soft, the suspension will sit too far into its travel and will feel mushy and easily bottom out . Its important to have the correct spring rate for each rider and setting up “SAG” will determine whether you have the correct rate or not.
Stiction
Or static friction, is a term that describes friction that occurs from parts rubbing or gliding across one another. For example, on both the rebound and compression stroke, the stanchion tubes must glide against the bushings, o-rings, seals, and other parts. The parts that come in contact with one another create friction and when a bending load is applied the stiction can increase causing the suspension to bind and feel notchy. Stiction can also dramatically increase after seals become dry resulting in the loss of small bump sensitivity.
Twin Tube Dampers
Twin Tube systems generally combine the technology of an “Open Bath” Damper and a “Closed Cartridge” system. With a Twin Tube design, the cartridge damper is inside of a tube (hence twin tube) allowing oil to flow from the cartridge damper into and from the twin tube providing additional oil flow and damping performance without the added weight of “excess” oil that is needed to fill the fork leg.
Valving
The mechanical hardware that creates compression or rebound damping. Valving is a combination of check valves, holes, ports, shims, springs, etc. The best valving arrises out of piston with a series of tapered shim stacks which are very thin high quality steel “washers” that when combined together produce a smooth yet linear flex pattern when oil flows around them. Shims provide the resistance to the oil flowing through the piston at various speeds. The lower amount of shims used typically means the damping quality is less. Systems that use one or two shims deliver a harsh feel on high speed hits, unfortunately, many so-called high performance suspension designs use very few shims and/or only small holes to control damping forces. If your clickers are ineffective or have a very small range, this is due to improper piston & shim stack design.