想提告要先做功課, 先確認廠商是否違反法規, 不是先上01. please refer to U.S. CONSUMER PRODUCT SAFETY COMMISSION, Office of Compliance Requirements for Bicycles, 16 C.F.R. Part 1512
"A bicycle must be able to tilt 25 degrees to either side with the pedals in their lowest position without the pedal or any other part of the bicycle (other than tires) hitting the ground."