Kit 27 to 26 135x10mmMade to ride a SHAN 27 or OKA with 26 wheels. With this hanger kit, the chainstay becomes 7mm shorter and the bottom bracket 12mm higher. Absolutely necessary to keep a frame fun to ride with 26 wheels without having your pedals hitting the ground due to a too low bottom bracket. Adaptor IS PM for 180mm rotor included. For 10x135mm rear hub. Comes with corresponding set of bolts.