Race face respond crank armsthe respond crank is part of the respond dham group designed for riders wanting big hit performance at all mountain weights respond is the perfect performance dham crankset for aggressive riders on a budget and is engineered to offer an optimal combination of strength stiffness weight comes with a race face 3 year warrantyraceface respond crank arms featuresarms are engineered using ultra high strength 7050 aluminum alloy to maximize strength to weight ratio