Infinity Quake Children's Bicycle for Sale. Six-speed gears with 20-inch wheels on a twelve-inch dual suspension frame. Suitable for kids around 7-10 years of age. Used but in good condition. Below are some of the specifications... Frame Size: 12-inch Stand-over Height: 23-inch Tires: Kenda Directional 20x1.95 Rims: Weinmann 6061 alloy Hubs: Joytech sealed Gears: Six speeds Gear Shifter: SRAM GripShift MRX Rear Derailleur: Shimano SIS Brake Lever: C-Star alloy Saddle: Velo Padded c/w quick release seat post Front Suspension: Zoom fork shocks Rear Suspension: Kindshock KS261 (adjustable)