Sram 7/8speed 34.9mm (35mm) Front derailleurSram 7 8speed Front derailleur 42T. Size 34. 9mm "Shifting" in a bicycle, also known as a front chainring or front derailleur, is a part of the bicycle's drivetrain system that functions to shift the chain to different sprockets at the front (on the crank) to change speed and pedaling force.

CHECK INSTALLATION

BOZO shell

Cannot be used 360 degrees

ball bearing

Non-stick:

Other specifications:

Outer diameter: 37mm

*outside diameter 42mm

$52× 40×8H×450×45°x1pcs

*12T narrow-wide tooth guide wheel weight: 11

helping to reduce the overall weight of the wheel and bike

Height(组配高度) :26mm+1mm