Challenge Fixie Track Bike - Unisex. If you are looking to get into track racing or if you just want a bike that's a bit retro then this is the one for you. Designed to get you where you want to go quickly! Black steel frame. 1 gear. Front V-type and rear V-type brakes. Weight fully assembled 11kg. 56cm / 22 inch frame size. 69cm / 27 inch wheel size. Suitable for 81 to 86cm (32 to 34 inch) inside leg measurements. Suitable for ages 14 years and over. Adjustable seat height. Additional features: Bell. General information: Some assembly required to fit front wheel, adjust brakes, fit pedals, saddle and handlebars. Tools and instructions included. EAN/MPN/UPC/ISBN: 5021967101017.