650B

Wherever the trail leads, SRAM's Roam 40 wheel is ready to go. The 25mm wide rims give big tires the support they deserve for outstanding cornering control, and the rims are durable enough for day-after-day sessions, yet light enough for race day. Stomp on the pedals and feel the excellent 4 pawl DoubleTime hub with 52 points of engagement. Ditch the tubes with the full UST compatibility to reap the rewards of excellent traction, control, and fewer flats. And, the Roams' great features continue with the Solo Spoke design that uses one spoke length to fit the entire wheel. This rear wheel comes with a quick release and 12mm thru-axle end caps that can be interchanged without tools.

Shimano X.9 Custom Wheelsets Looking for a great wheelset for your mountain bike that won't break the bank? Then look no further than our custom hand built SRAM X.9 wheelsets. Our X.9 Wheelset builder gives you a variety of hub, rim, spoke & nipple options, so you can truly build the X.9 wheelset that you've always wanted. Try & buy today!

SRAM X9 hubs are some of the highest quality hubs on the market, designed right here in the United States. Built around legendary SRAM precision quality, X9 hubs are designed for riders who are going to put their bike through the paces and want a hub that's going to last. Make your next wheelset one that's unique. Use our SRAM X9 custom wheelset builder and build your own unique wheelset specifically for your riding needs!