15x 110mm front, 141mm qr rear, 6-bolt disc & Shimano freehub Alex md 35 rim is double-walled, pinned & disc-specific Does not include the skewer, reflector, rim strip, valve or owners manual Trek Wheel Rear Alex MD35/DC-2241 27.5 32H 141 27.5 x 2.6;old (rear hub)=141mm Black