Fork oil is the damping medium of your front suspension. It flows through calibrated orifices in the cartridge, and this hydraulic resistance controls compression and rebound speed.
More viscous = firmer damping.
| Grade | Viscosity (cSt @40C) | Usage | Feel |
|---|---|---|---|
| 5W | ~15 cSt | Comfort touring, light rider | Soft |
| 10W | ~33 cSt | Standard road, all-round | Balanced |
| 15W | ~50 cSt | Sport road, heavy rider | Firm |
| 20W | ~75 cSt | Track, pure sport | Very firm |
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L'Atelier Assistant
Source: Official workshop manuals
For the complete suspension setup process, check our preload adjustment guide.
L'Atelier knows your bike's fork specs. Ask for the recommended oil grade — answer in 3 seconds.
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