RENTHAL 1-1/8 TWINWALL HANDLEBAR RC HIGH 922 BLACK Large diameter, 1-1/8in. (28.6mm), double-tubed handlebar that combines great strength, excellent resilience and a virtual guarantee against fatigue failure Consists of 2 aluminum alloy tubes, one within the other Outer tube is 7010 T73, which has extreem resistance to mecanhical damage and is anodized to prevent corrosion Inner tube is ultra high strength 7010 T6 aluminum and is hard anodized to resist wear from twist grip and controls Rubber seals cover the join to keep out water and cleaning fluids