Ruption Force BMX Bike. For 2012 Ruption have taken the 36/13-geared %u201CThrust%u201D and replaced it with 25/9-geared %u201CPhase%u201D and fat 20x2.25″ Innova tyres on all 20" models. Frame: Hi Tensile strength 1020 steel 20″ Toptube. Gears: 25T/9T. Fork: Ruption Hi Tensile strength 1020 steel. Bars: Ruption Hi Tensile 1020 steel Bar 7.5″. Headset: 1 1/8″ A Headset threadless. BB: American BB Unsealed. Pedals: Wellgo plastic freestyle. Grips: Ruption fingerprint grips. Stem: Forged alloy front load. Sprocket: Ruption 39T steel. Cranks: 1 pc 175mm. Seat: New design Ruption seat. Tyres: Innova 20" x 2.25" tyres frt and Rr. Front Hub: 36 Hole, 10mm unsealed. Rear Hub: 36 Hole, 10mm unsealed with 14mm adaptors. Rims: Alloy, 36 Hole. Rear Brake: Tektro Forged Alloy U-brake. Freewheel: 16T. Chain: KMC Z410. Seatclamp: Integral single bolt. Weight: TBC.