The Mongoose Massif 20-Inch Boys' Bike has huge four-inch wide tires that let this fun bike roll over all sorts of obstacles. Twist design shifters allow the rider to change gears quickly and easily through seven speeds assisted by a Shimano rear derailleur. The black/yellow boys' bike features disc brakes that can bring the massive tires to a stop quickly and effectively in most any riding conditions. The aluminum steel frame is both strong and durable and allows young boys to explore their surroundings on a true all-terrain bicycle. The bright yellow alloy rims are lightweight and will ensure that the bike and rider can be seen at all times. The Mongoose Massif 20-Inch Boys' Bike also features yellow handle grips and the familiar Mongoose logo in yellow on the front.


Great news! If you select Site to Store delivery, you can call your local store as complimentary assembly may be offered at that location.

20" Mongoose Massif Boys' Fat Tire Mountain Bike, Black/Yellow:
Frame: Aluminum/steel
Mongoose boys' bike gearing: 7 speeds with Shimano rear derailleur for all types of riding
Brakes: dual disc brakes provide all-condition braking
Tires: super-sized 20" x 4" tires
Rims: alloy 4" wide rims for lightweight durability
Twist shifters change gears easily
3-piece crank provides added durability
Some assembly required
Dimensions: 56"L x 27"W x 38"H