Why Mountain Bike Service Intervals Run on Hours
A fork or shock wears by how many times, and how hard, it gets compressed, not by how far you pedalled. An hour on a rough descent loads the seals far more than an hour on a fire road, which is why suspension makers publish hours. Our suspension service guide covers that in detail.
The brand differences are worth knowing. Fox organizes its intervals by spring type: air-spring forks need lower-leg oil, FLOAT fluid, bushing and dropout checks every 100 hours or annually, while coil forks need lower-leg oil every 30 hours. Rear shocks need an air sleeve service every 30 hours and bushing and fluid service every 100 hours or annually. RockShox splits service into a lower leg or air can service every 50 hours and a damper and spring service every 200 hours on current forks. Among shocks, SRAM's sheet lists the Monarch and Vivid families at 100 hours for the damper and air can service, and the Deluxe and Super Deluxe at 200.
RockShox dropper posts have their own tiers, from 50 hours for a lower post or remote lever service up to 600 hours for a complete service, depending on the Reverb model.
How Long a Mountain Bike Chain Lasts
Mountain bike chains wear faster than road chains because of grit, mud and torque. Independent tester Zero Friction Cycling sets lubricant targets by conditions, counting chains worn to the 0.5% replacement mark per 5,000 km:
| Riding | ZFC target (chains per 5,000 km) | Implied distance per chain |
|---|
| Gravel or mountain bike, predominantly dry | below 1.5 | about 3,300 km or more |
| Frequent wet conditions | below 2.5 | about 2,000 km or more |
| Very harsh, wet and gritty | below 3.5 | about 1,400 km or more |
These are test targets for choosing a lubricant, not a promise for your chain, and the last column is our arithmetic. Measure instead of guessing: our chain replacement guide has the wear threshold for each drivetrain, and the chain stretch measurement guide shows how to read it.
How to Adjust a Mountain Bike Service Schedule for Conditions
Every source in the table says the same thing: harder riding means shorter intervals.
"If you ride in extreme conditions frequently (wet and muddy, downhill racing, winter riding, etc.), correspondingly the service intervals should be more frequent." Fox: Service Intervals
A Trek dealer's maintenance chart makes the same point for the whole bike: "Bicycles ridden off road typically require more frequent and extensive service than road models." Trek Chicago: Bike Maintenance Chart CeramicSpeed lists hot, humid, sandy and consistently wet riding as conditions that increase bottom bracket maintenance, and Stan's says sealant life depends on temperature, humidity, how often you ride and how many punctures it has already sealed.
None of these makers publishes a multiplier for mud or wet weather. Treat the intervals above as the ceiling, and pull them in after a wet race weekend, a bike park trip or a season of winter riding. Our bottom bracket service guide and wheel bearing guide cover the bearings in more detail.
A Simple Mountain Bike Service Routine
- Every ride: wipe the fork and shock exterior clean, and check tyre pressure and brake feel before you leave.
- Every month: measure chain wear, and check the pads against your brake pad guide.
- Every 3 months: check or refresh tubeless sealant.
- Every 50 hours: RockShox lower leg and air can service, or the Fox intervals for your fork and shock.
- Every year: bleed DOT brakes (see our hydraulic fluid guide), check hub, headset and bottom bracket bearings, and do any annual suspension service.
How Componentry Tracks Mountain Bike Hours and Distance Together
Suspension has no odometer, and no ride data can read the oil inside a fork. What an app can do is count the ride time and distance on each part, so the hours interval and the distance interval both have a number to work from.
Componentry adds the time and distance from every Strava, Garmin or Wahoo ride to the parts on the bike you rode. Set the fork and shock to a service interval in hours, the chain to a wear limit, and the sealant to a monthly reminder. Log each service when you do it, and the next reminder reflects how you actually ride.
Related Componentry articles:
Technical reference:
