Pedal Kickback & Drivetrain
When the rear end compresses, the chain pulls on the chainring. Pivot, gear and freehub decide how much of it reaches your pedals.
Photo: Almas Salakhov, UnsplashWhere kickback comes from.
The swingarm rotates around the main pivot and the axle moves away from the bottom bracket. The chain has to get longer and takes that length from the chainring.
Model frame, not a specific bike: linkage-driven single pivot, 200 mm travel, 34T chainring, 165 mm cranks. The fork compresses as far as the rear. Rear wheel stationary, the freehub engages on average after half its engagement angle. Anti-squat relative to a 1100 mm centre of mass.
The faster, the less.
While the rear wheel rolls, the freehub overruns and soaks up the chain. Kickback only remains when the rear end compresses faster than the wheel can feed chain.
One hit from sag to 190 mm at constant wheel compression speed, freehub with 10° engagement. If you brake the rear wheel, the value at 0 km/h applies.
Parts for this topic
We are adding the parts for this right now. Until then, the basics are in the shop.
To drivetrain