How to extend the life of bicycle tires?

Most of the road surface is high in the middle and low on both sides, and the bicycle must stay on the right side when driving.
Because the left side of the tire is often more worn than the right side.
Also, because the center of gravity is rearward, the rear wheels generally wear out faster than the front wheels.
If the new tire is used for a period of time, the front and rear tires are replaced, and the left and right direction is replaced, so that the life of the tire can be extended.

The bicycle chain skid treatment tips:
Bicycle chain used for a long time will appear the phenomenon of sliding teeth.

This is caused by the wear of one end of the chain hole.Because the chain hole has four directions of friction, so as long as open the joint, turn a ring, the inner ring of the chain into the outer ring, the damaged side is not directly with the size of the gear contact, no longer skid.