The specialized boy39s 21 speed hotrock 24 kids bike 2017 features a wide gear range that puts any hill within reach ensuring more time smiling and less time sulking as they push their bike of course it also features a light weight yet durable a1 premium aluminium frame that39s designed to take a hit while they find their legs on the pump track while chatter and bumps are handled by the coil sprung sr suntour fork39s 50mmnbsp