• Crown XC 100 27.5 Rim Mechanical Disc 21 Gear Aluminum Body Butterfly Gear Mountain Bike Black Gray Unlocked Clamp Butterfly Gear Mechanical Disc Model Bicycle Type Children's Mountain Bike Number of Gears 21 Squad ALUMINUM Squad Size 17" Rim Length 27.5" Brake Type Mechanical Disc Tongs Crown Brake Mechanical Disc Spike 24X34X42T 152MM Ruble Shimano TZ500 14-28T Chain 7S INDEX Seat Crown Handlebar 540MM Handlebar Strait 50MM Rim Set CROWN DOUBLE LAYER Tire CHAOYANG 27.5X 2.10 Hopper Steel