104Pcd Chinook 4 Arm Middle Chainrings

The Chinook 104 range was changed to cater for far reaching technical gear system developments. The new generation middle rings have two pairs of shortened teeth to assist down-shifting. * PCD : 58/104mm. * Compatible 8/9 speed * middle : 32, 34, 36, 38, 40, 42T * Colours : Silver or black. * Material : AL 7075 T6