The specialized hotrock 20 6 speed street boys bike 2017 is a light weight low standover height frame with properly proportioned and easy to use controls makes the hotrock perfect for a kid39s first multi speed bike features a light weight and stable a1 premium aluminium frame construction combining with a straight blade alloy fork for fantastic control 6 speed shimano gearing offers a wide ratio that39s perfect for taking on longer climbs with ease complete with light durable alloy