12 x 135/142 mm

X-9, X-7, Rise 40

Zipp 177 hub (as of 2015), 177D Disc hub (as of 2015), 176 hub (as of 2018), 176D Disc hub (as of 2018), Super 9 Track Disc, 900 Track Disc

11/12 speed, aliuminium, 6 pawls, compatible with Zipp ZR1 (D-brake ir Rim brake) and Zipp ZR1 SL hubs, 12 x 142 mm thru axle / 5 x 135 mm QR

54T