Shimano GRX Wheelset, WH-RX880-700C, Carbon, Disc, HG-Spline-L2Faster, further, and more fun SHIMANO RX880 carbon wheels are 64 grams lighter per pair than their predecessors and feature the same shallow 32 mm rim height for faster acceleration and quicker climbing. The low profile also ensures better control in cross winds, and these tubeless wheels employ a modern 25 mm inner rim width suitable for tires up to 50 mm wide. FEATURES 32 mm full carbon rim Recommended tire size: 32 622 50 622 Modern 25 mm inner rim