The specialized boy39s 6 speed hotrock 20 kids bike 2017 is perfect for when rapidly growing children who love to ride bridging the gap before they take the leap towards a big kid trail shredder within a few years the hotrock 20 6 speed comes with plenty of gear range to tackle the neighbourhood hills and enough to ride beginner39s trails confidently of course it also features a light weight yet durable 20 inch a1 premium aluminium frame that39s designed to take a hit w