Set rider sag first, then check that the spring rate suits your weight and load. Adjust rebound and compression one change at a time, on a road you know, and write down what you changed.
What this job covers
Set rider sag first, then check that the spring rate suits your weight and load. Adjust rebound and compression one change at a time, on a road you know, and write down what you changed.
Signs you need it
The bike runs wide, feels vague or bottoms out on bumps. The rear kicks back or packs down over repeated bumps. The front dives excessively under braking. The bike feels nervous with a passenger or luggage. A previous owner changed springs or settings without a baseline.
The process
Measure: Static and rider sag are measured with the bike loaded the way it is ridden. Fork and shock travel are recorded.
Check the spring: If the correct sag cannot be reached within the adjuster range, the spring rate is wrong. No clicker fixes a spring.
Baseline settings: Damping adjusters are returned to a known baseline, counted from fully closed, and recorded.
One change at a time: Rebound first, then compression, on a repeatable road loop. Each change is tested and logged.
Condition check: Oil, seals, bushings and linkage are inspected. A worn damper cannot be tuned.
Final setup: The bike is set for the rider's real use, with notes for passenger and luggage changes.
What is included
Sag measurement and spring-rate assessment A written baseline of every adjuster Damping adjustment on a known road Fork oil and seal condition check Rear shock and linkage inspection Settings notes for load changes
What affects the scope
Rider weight and load range Condition of the original suspension Whether the fork or shock is serviceable The surfaces the bike is actually ridden on
How to prepare
Bring the bike with the luggage and passenger you normally carry. Wear your riding gear for the sag measurement. Note what the bike does wrong and where, not just that it feels bad.
Checklist
- Rider sag and static sag measurement
- Spring rate and preload for weight and luggage
- Rebound and compression damping adjustment
- Fork oil, seals and bushing condition
- Rear shock condition and linkage
- Setup for road, touring, gravel and track
Questions
Is a stiffer bike faster?
Not automatically. A spring that is too stiff keeps the tire from following the road. Grip and comfort come from controlled travel, not from hardness.
Can I set sag with a passenger?
Set the solo sag first, then note the change with the passenger and luggage. If the rear cannot be brought back into range with preload, the spring is too soft for the load.
Do I need aftermarket suspension?
Only if the original cannot be adjusted or serviced to suit your weight and use. Fresh oil, correct springs and a revalve often cost less than replacement and work better for a road bike.