Swiftwick Aspire Twelve (Knee High) Socks Bike Accessories Brand_Black Ops Contemporary design features a non-slip

Contemporary design features a non-slip rubber coated bike hook for protection of your tire rim

Shifters Shimano Altus

Adapting it for Shimano cranks takes a special machined aluminum threaded bottom bracket that threads into itself

Rails: Steel

Swiftwick Aspire Twelve (Knee High) Socks Bike Accessories Brand_Black Ops Contemporary design features a non-slipA firm compression sock that rises 12 inches over the knee with support for all day endurance. Firm compression provides contoured support and prevents bunching Lightweight Olefin fiber in a minimum cushion design is cool, wicks moisture and dries quickly to keep you performing at your best Y Heel contour creates a contoured heel pocket that moves with the foot Virtually invisible toe seam eliminates friction in the toebox Mesh footbed and channeled