Compatible only with the following SRAM 11-36 and 12-36 cassettes: PG-1030, 1050, 1070 and the XG-1080
Remove the 14T cog on the XG-1080 instead of the 17T
SRAM GC42s are not compatible with 2011 or older SRAM rear derailleurs
Compatible only with the following SRAM 10 Speed Cassettes: X5 11-36T (PG-1030), X7 11-36T (PG-1050), X9 11-36T (PG-1070), X0 11-36t(XG - 1080) - Remove the 14t rather than the 17t
Per Wolf Tooth, the GC 42 is not compatible with 2011 or older SRAM rear derailleurs due to the position of the upper jockey wheel. The best ways to tell the vintages of your rear derailleur

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 5 inch
Height : 0.01 inch
Length : 10.4 inch

Item Weight: 0 ounce (View shipping rates and policies)
Shipping Weight: 3.2 ounce (View shipping rates and policies)

ASIN : B00SD99Z9C