Specifications: It is easy to install, and wont damage the rotating rod after locking the screw. 34.9 can be converted to a diameter of 28.6 or 31.8 to fit the diameter of the middle tube of 28.6 or 31.8. Used on the middle tube of the frame, it can effectively prevent the chain drop and chain jump.
Item Name: Chain Guide Material: Aluminum Alloy, POM Features: High Strength, Durable, Non-rust Installation Caliber: 34.9mm/1.37" Size: 6.94cm x 6.86cm x 5.72cm/2.73" x 2.70" x 2.25" (Approx.)
Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.
Package Includes: 1 x Chain Guide 1 x 28.6 to 34.9 Conversion Piece 1 x 31.8 to 34.9 Conversion Piece 1 x 3mm Wrench 1 x 4mm Wrench