Shimano Alfine S501 Crankset 42T

Shimano Alfine S501 Crankset 42T. Shimano Alfine is clean, stylish and high performance for the urban environment it's perfect. Alfine's premium quality, style, versatility, and ease of use are for quality conscious riders. The Shimano Alfine S501 Crankset 42T includes an SM FC4600 Bottom Bracket for a 68mm BB shell, which makes it easy to install. The 42 tooth single ring, coupled with Alfine's internal 8 or 11 speed rear hub not included, is ridiculously easy to operate and provides hundreds of hours of maintenance free use.