Your fork as stanchions diving into the lower legs as the fork goes down and up. Stanchions are exposed to the outside elements and also go down inside the fork, while no outside elements (dirt, dust, water..) should ever go inside the fork.

This is only possible thanks to wiper seals. Wipers seals seat on the top of lower legs and are responsible for wiping out dirt and dust from the stanchions so none of it goes inside the fork.

Wipers seals need to be replaced on a regular basis.

3. New hydraulic bleed

All fork dampers require proper hydraulic bleed, in many cases using a vacuum bleed machine.

4. New internal wear parts

MTB forks are not only tubes and legs: there is multiple parts inside, including wear parts that require proper care.

Wear parts are parts that will get worn out with normal use and should not be mistaken with broken parts. Wear parts are seals, foams, and in some case sealheads and bumpers. Internal wear parts can only be replaced after a disassembly of the fork.

5. Disassembly, control and rebuild

MTB forks are assemblies of mechanical parts that are threaded and pressed with each others. Assemblies will disassemble when the fork is used.

After 100h of use, full disassembly, check of every part and rebuild is the way to make sure your fork remain in good shape and safe to ride.

6. Expertise and equipment

Professional servicing requires specialized knowledge, tools, and expertise to thoroughly inspect and maintain fork internals, ensuring comprehensive care and issue identification.

Recommended Fork Servicing Intervals for Major Brands:

Fox: Fox recommend full fork service (including damper and air spring) every 100h or annually whichever comes first

Rockshox: Rockshox suggest full fork service every 50, 100 or 200h depending on the model and parts; in practice it is best to do it every 100h, otherwise the next 100h will be less than optimal

Öhlins: Öhlins suggest full fork service every 50 to 100h of riding, depending on the specific fork model