Ordinary bicycles have a long service life.

It depends: 1 If your bike is a "Shanghai" brand, I believe it will go wrong in less than a year. If you buy it in a big shopping mall, it should be able to ride normally for 2-3 years with double shock absorbers and ordinary wheels on the frame. If you have some relevant knowledge, or often soak in bicycle forums, you will definitely buy and assemble. After all, the price is affordable and if you know something.

Generally, you buy mountain bikes, but if you buy road bikes, you have certain good riding habits and the car condition is OK. You can use about 2 bikes. After all, this kind of bicycle is rather shabby.