Road Race Variable Speed Solid Tire Double Disc Brake BicycleProduct information: Material: high carbon steel Collapse: No Propulsion mode: chain Load capacity: 120kg Frame type: soft tail frame Front fork type: oil spring fork (spring rebound shock oil damping) Foot type: beaded foot Brake system: double disc brake Brake type: front and rear wheel V brake Color: 24 speed 40 knife pure black, 24 speed 40 knife white black and white, 24 speed 40 knife white black, 24 speed 40 knife Bianchi, 24 speed 40 knife