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