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Shimano 9000

Shimano is only producing one crank, with a proprietary 110mm bolt circle. An extremely wide range of chainrings bolt onto the arms though, from compact to huge time trial rings. Photo: Nick Legan

Shimano is only producing one crank, with a proprietary 110mm bolt circle. An extremely wide range of chainrings bolt onto the arms though, from compact to huge time trial rings. Photo: Nick Legan