700C Hybrid bike / Road bike speed and hybrid bike versatility. Shimano 24-speed (3*8 gears) change system provide a stable speed change experience. Aluminum rims,TEC chain and CHAOYANG 700*25C High-performance tyres,good riding experience. 85% pre-assembled,easy to assemble,free installation tools and pedals include Front and Rear Disc brakes ,double brakes more safter and faster braking response