The Chinook 104 range was changed in 2008 to cater for far reaching technical gear system developments. The new generation middle rings have two pairs of shortened teeth to assist down-shifting. There are two widths available for outer rings - applicable where the ring meets the spider. The width of the arm close to the bolt holemeasures 18mm or 23mm. PCD : 104mm. Compatible 8/9 speed middle : 32, 34, 36, 38, 40, 42T Colours : Silver or black. Material : AL 7075 T6 |
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