The Descendant Eagle DUB 6K crank arms are made from aluminium 6000. You will be complemented by the current X-Sync 2 direct mount chainrings. These impress with a much quieter running of the chain and better self-cleaning in muddy conditions. With the tried and tested alternating thick-thin tooth profile, which is matched to the Eagle chains, the X-Sync 2 chain rings always hold the chain securely in place. The crank is supplied with a 32 teeth chain blade.