Trek youth frame upgraded w/ hydraulic (not cable) small reach brake levers and calipers. Game changer for the small riders to have levers that fit a small hand and work well. With seat down it fits a tiny rider and leaves years of room for growth. No need to buy a bike every year. Fat tire allows a low pressure which adds to a smooth ride. Full suspension for a 40lb kid is a waste of money. Always maintained by 2nd Ave Sports.