Sign up for
Participate with your entry in one of our professional or student awards.Sign up for an award
You are using an outdated browser. Please upgrade your browser to improve your experience.
The brake of bike is easily wore and tore. It is frequently forgotten to be changed and unknown when to be changed.
The new design of brake is painted double-ply, green outside and red inside. We can know the brake should be changed when the red is exposed, so it can give us more secure