The Mongoose Vivid has size 20" wheels, a steel frame, foot brake (coaster brake), front brakes and a rear mountain style V-brake. The Vivid is slightly larger than the Free Agent champ. This bike is perfect for a rider who is comfortable riding without training wheels and is around 8-11 years old. The crank arms are long and the frame length is built for bigger riders. This bike will not ride well with the seat all the way low. The rear axle is long enough to accept training wheels. Beautiful Bass Boat silver paint with purple graphics will attract attention whenever you ride! I love that this bike comes with three brakes and the rear is a V-brake that has incredible stopping power. These brakes will give a young rider the confidence she needs to transition over to a freewheel MTN style frame when she gets older.