1. Knock on the lining, which is done by many people. This is the most economical way, and this way can be restored.

2. In addition, in order to increase the approach angle, cut off the front block and bend it in, so that it can't be wiped, and it also increases the approach angle, which is irreversible.

3. You changed the shock absorber and the tire hub. You only need one race. Let's change the competition. Just tear it down and stop rubbing it.