IRD Rock Jock Assymmetrical Jockey Wheel Set, Black
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- Increase derailleur capacity so you can run a bigger cassette w/o a slack chain in certain positions
- Assymetric design can "rock" to adjust itself to the best position for each gear
- Increase chainring total difference
- Oversized for increased efficiency, but does not need a new cage or extra long chain. (14t tension pulley and 12t guide pulley)
- Reduces chain bounce
- CNC-machined aluminum wheel
- Designed for Shimano 11-speed and older rear derailleurs. Either SS and GS cages can be used. Some long cages may be compatible. Works with 11, 10, and 9-speed chains
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