You can adjust the rear wheel derailleur until the rear small wheel screw is tightened to tighten the chain.
The tightness of the bicycle chain is generally no less than two centimeters up and down. Turn the bicycle over and put it away; then use a wrench to loosen the nuts at both ends of the rear axle, and at the same time loosen the brake device; then use a wrench to loosen the flywheel end Tighten the ring nut to the tight end, then the chain will slowly tighten; stop tightening the ring nut when it feels almost done, correct the rear wheel to the middle position of the flat fork, then tighten the axle nut, and turn the car over That’s it.
Precautions for variable speed bicycles
Don’t change gears on a slope. Be sure to change gears before entering the slope, especially uphill. Otherwise, the transmission may lose power due to the gear shifting process not being completed, which will be very troublesome.
When going uphill, theoretically the smallest gear is used at the front, which is 1st gear, and the largest gear is at the rear, which is also 1st gear. However, the actual rear flywheel gear can be determined according to the actual slope; when going downhill, the smallest gear at the front is theoretically used, which is 3rd gear. The gears are shifted according to the principle of 9 gears, the smallest at the back, but it also needs to be determined based on the actual slope and length.
Post time: Nov-27-2023