Pump /pʌmp/ 打气筒
A bike pump is necessary if you travel long distance.
Tire /taɪr/ 轮胎
I've got a flat tyre (= the air has gone out of it).我的车胎没气了。
Pedal /ˈped.əl/ 踏板
I could stand up on the pedals of my bike when I was 5 months old.
She had no brakes on her bicycle.
Chain /tʃeɪn/ 链条
You'd better take care of your chain of your bike to work properly.