Number of Speeds: 21Color: Black&YellowWheel Size: 27.5 InchesFrame Material: AluminumSuspension Type: FrontSpecial Feature: lightweightIncluded Components: assembly tools High tech Frame - Hiland Slycan has a high quality ultralight aluminum frame for riding and moving with ease,corrosion resistant and very easy to clean and maintain.Internal shift cable and brake hose routing can help your cables last longer by protecting them from any environment,reduce wind resistance for higher speed. Brake