• Effectively prevent the chain from falling into the bike frame, avoids causing damage to the frame surface
• It is installed at the front transmission position and is easy to install 
• The external magnet design is easy to use and does not require the magnet to be fixed to the frame

Specification:

• Material: 6061-T6 aluminum alloy
• Applicable: 34T-50T, 36T-52T, 39T-53T
• Suitable for: road bikes