absoluteBLACK 4 Bolt Narrow Wide Chainring - 64 BCD - Oval - Black - 9-12 Speed - 28T Images Uploaded - Ready for Review Shimano's Genuine 9 speed derailleur

Shimano's Genuine 9 speed derailleur jockey wheels are available in different quality levels

Backing plate material: Available with Steel backing plate but also with a Titanium option for less weight

Compatible with ONLY 6-bolt REAR wheels (there is no way to space centrelock rotors more than 6mm)

(I asked too)

Directions:

absoluteBLACK 4 Bolt Narrow Wide Chainring - 64 BCD - Oval - Black - 9-12 Speed - 28T Images Uploaded - Ready for Review Shimano's Genuine 9 speed derailleurabsoluteBLACK is dedicated to producing the world's finest oval chainrings and were the first to crack the code to discover the correct shape and 'clocking' to make an oval chainring work. They learned how to maximize the part of the stroke where power is produced and minimize resistance where it isn't which has the effect of smoothing out the delivery of power throughout the pedal stroke and improving efficiency. Many other brands have followed suit