For those going for the most technical ascents and demanding descents. High end star ratchet hubs, 26mm wide rims and aero spokes; an XC wheelset on steroids.

XM 1650 front 5 mm	100 mm / 5 mm	Black with black / white decals	718 g
XM 1650 front 15 mm	100 mm / 15 mm	Black with black / white decals	714 g
XM 1650 rear 5 mm	135 mm / 5 mm	Black with black / white decals	831 g