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  1. Home » Quarq adds XX1 and Shimano-compatible power meters for 2015 » Quarq XX1

Quarq XX1

The use of a 104BCD spider prevents riders from running less than a 32-tooth chainring — at least if they want to stick with SRAM rings. Aftermarket 30-tooth rings are available from companies like RaceFace, Wolf Tooth, and Pacenti. Photo: Quarq

The use of a 104BCD spider prevents riders from running less than a 32-tooth chainring — at least if they want to stick with SRAM rings. Aftermarket 30-tooth rings are available from companies like RaceFace, Wolf Tooth, and Pacenti. Photo: Quarq