The Impact is a great kids BMX tailored to the beginner rider with carefully selected parts to suit smaller riders. Featuring a bright paint job you’re sure to stand out from the crowd. The Ruption Impact 18w 2015 Features are. Ruption 1020 Hi-Ten Frame w/ 18 inch Top Tube. Ruption 1020 Hi-Ten Forks. 1-1/8 inch Ahead Headset. Ruption 7 inch Rise Bars. Ruption 50mm Frontload Stem. 1pc Hot Forged Steel Crank, Ruption 25T Chainwheel. 18 inch 36 Hole Alloy. Innova Tyres 18 X 2.125 Front Innova Tyres 18 X 2.125 Rear. Ruption Padded Combo Seat. Collection only SW London TW10.