The BMC Alpenchallenge AC01 2017 is one of the largest Urban bikes on the market. The ultra-light triple butted aluminum frame with aluminum front fork gives the Alpenchallenge unrivaled good riding characteristics. The Shimano Alfine 11 hub switches perfectly and in combination with the Gates Beltdrive a super maintenance-friendly combination. Never lubricate your chain! The Alpenchallenge is equipped with short chain stays, which provides a truly usable and direct driving bike.