How to service your MTB shock absorber?
Too many riders unfortunately neglect the maintenance of their MTB shock absorber, forgetting that it is an important part of the bike's chassis and is constantly under stress when riding.
- Time: 1h30
- Level: Intermediate
- Tools: Vice with soft jaws | Cup spanner (or rubber strap wrench) | Pick | Clean cloth | Grease or seal lubricant | Suspension lubricant
Coil spring shock absorbers require almost no regular maintenance. You will simply need to replace the spring when it is worn and to replace the seal kit for the hydraulic section. Air shock absorbers, on the other hand, require more frequent maintenance. Data may vary from one manufacturer to another, but you can follow these service intervals:
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Before each ride: check the cleanliness, condition and lubrication of the stanchion with a product that does not damage the seals.
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Every 50 hours (~25 rides): for an air system, replace the seal kit for the air sleeve.
- Every 100 hours (~50 rides): for both systems, air or coil spring, drain and replace the complete seal kit.
The 100-hour service is a fairly involved operation, so we recommend having it carried out by a specialist. However, here is how to perform the 50-hour service yourself. Please note that this procedure applies only to air systems.
Steps
- Remove the SAG English term for "sag", referring to the amount a suspension compresses when the rider is seated on the stationary bike in the riding position. Generally for Cross-country the value is between 10 and 15%, for All-Mountain/Enduro between 20 and 30%, and for DH / Freeride 30%.
measurement seal. - Fully deflate the air from the shock absorber.
- Using the strap wrench, unscrew the air sleeve, then gently pull it to separate it from the rest of the shock absorber.
- Replace the worn seals in the air sleeve, making sure to note the orientation and order of assembly. Clean the sleeve with the cloth before fitting the new seals, which should be greased beforehand.
- Then replace the stanchion seals and the shock absorber head seal in the same way.
- Refit the air sleeve onto the shock absorber having first applied approximately 1 ml of suspension lubricant.
- Hand-tighten the air sleeve.
Probikeshop Tip: no need to overtighten it — between 4 and 5 Nm depending on the model.
- Re-inflate to the pressure suited to your weight.
Your shock absorber service is now complete. Remember to lubricate the stanchion regularly to preserve full sensitivity and protect your equipment.
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