11sp 135mm QR endcaps compatible with 1100/1400/1600 Dicut, 1400/1600 Spline wheels with Shimano style ratchet system freehubs 11sp 135mm QR endcaps compatible with 1100/1400/1600 Dicut, 1400/1600 Spline wheels with Shimano style ratchet system freehubs Specific to 11 speed road Straight pull and disc hubs and are not compatible with 9/10 speed MTB hubs