Shimano BB-ES300 Octalink Bottom Bracket 73x118mm Hollow Type 11.7018.078.004 Wolf Tooth headsets are machined

Wolf Tooth headsets are machined in the USA with aircraft-grade 6061 aluminum

Hubs: ENVE INNERDRIVE Premium Straight-Pull

you'll get around town easily without worrying about flats or traction on parkways and cobbles

The low-profile design ensures uninterrupted rear shifting on rugged terrains

Merino wool and moisture-wicking recycled polyester blend

Shimano BB-ES300 Octalink Bottom Bracket 73x118mm Hollow Type 11.7018.078.004 Wolf Tooth headsets are machinedTechnologies Octalink Compared the power transfer of OctaLinkwith the conventional square taper spindle, the 8 splined OctaLink interface that connects bottom bracket and crank set increases the strength and rigidity for entire assembly. Specifications Axle Length Shell Width 113 68 mm (BC1. 37) 113 70 mm (M36) 113 73 mm (BC1. 37) 118 68 mm (BC1. 37) 118 70 mm (M36) 118 73 mm (BC1. 37) 121 68 mm (BC1. 37) 121 73 mm (BC1. 37) 126 68 mm (BC1. 37) 126 73