1. Open the front cover of the front wheel claw shaft and pull out the lock pin of the shaft head lock nut.
2 After turning the nut, move the wheel to feel the clearance (or according to the thread lead rotation 1/4, the general clearance is 0.25-0.35mm).
3 Adjust the rear lock nut, and the adjustment is complete.
The rear wheel is adjusted by the nut on the shaft sleeve.