The electric car has two front wheel bearings. If the bearing is replaced with a new one, you can only buy the fully enclosed bearing of the same model from the hardware standard parts store [the general market price of front wheel bearing is one in 5 yuan, and * * * two bearings 10 yuan]. Buy bearings from Harbin, wafangdian city and Luoyang, not from other places. Installing bearings is very simple. First put one bearing in the center of the tire and knock it in place, then put the sleeve on it, and then put the other bearing on it and knock it in place, so that the sleeve is between the two bearings. Another trick is to teach you: sometimes one of the two bearings on the front wheel falls off completely, and the outer ring and inner ring of the bearing are separated. Because there is no step in the center of the tire, the outer ring can't be knocked down at all. If you don't pay attention to beating hard, the tire will break. At this time, you can smash another discarded bearing that was knocked out, take out five or six balls, and apply some butter [industrial grease] to the outer ring of the bad bearing in the center of the tire. Stick 5 ~ 6 balls together, and then put the inner ring of the bearing in the middle and stick it to the outer ring. When the inner ring is turned by hand, the balls are dispersed into a circle, thus forming a temporary bearing. When the inner ring of the temporary bearing was hit hard, the outer ring of the bearing was knocked down immediately and the tire was not damaged. This is something I have done myself.