Patent ID: 8505694

Claim:
A brake system for bicycles, comprising: an arm unit including a first arm 11 and a second arm 12 , said first arm 11 includes a first pivot point 15 located between a first extension end 111 and a link pivot end 112 , said second arm 12 includes a connector portion 123 located between a second extension end 121 and a pivot end 122 , the first and second arms pivotably connected to each other at said pivot end 122 of said second arm 12 , two brake pads respectively connected to the first and second arms and located on two sides of a wheel rim, wherein said first arm includes a link pivot end; a cable unit connected to the second arm at connection portion 123 of said second arm 12 and including a brake cable, and a link unit connected between the first and second arms and located at one of the two sides of the wheel rim, the link unit including a first link which has a first end pivotably connected to the second arm and a second end of the first link connected with the brake cable, a second link having a first end thereof pivotally connected to the link pivot end of said first arm and a second end of the second link pivotably connected to a mediate portion of the first link.