Mt55 wheelset mt55 disc wheel system brings high performance technology to an affordable price point radial and lateral support for superior strength and durability super quick engaging freehub body giving near instant power transfer easy to use centre lock disc rotor mount 24 butted spokes contact seals with internal grease sleeev to keep the elements out and the grease in for use with 26 x 15 225 inch clincher tyres includes quick release disc compatible only 8910 compatible