Product Details Bike Type Road Bike ,Hybrid Bike Age Range (Description) Adult Number of Speed 24 Speed Color Titanium Wheel Size 700C Frame Material Aluminum Alloy Frame Suspension Type Rigid Frame Size 21 inch Frame Special Feature Lightweight 700C Hybrid bike / Road bike speed and hybrid bike versatility. Aluminum rims,TEC chain and 700*25C High-performance tyres,good riding experience. 85% pre-assembled,easy to assemble,free installation tools a nd pedals include Front and Rear Disc brakes ,double brakes more safter and faster braking response