##Wolf Tooth Components 110 BCD Asymmetric 4-Bolt Chainring for Shimano Cranks Renowned for their small scale, high quality production techniques, the team at Wolf Tooth Components in Minneapolis, USA are well versed in the function of their products due to their own riding and testing, and in the Wolf Tooth Components 110 BCD Asymmetric 4-Bolt Chainring for Shimano Cranks, they've created a tough, rough, and ready chainring to provide you with the traction, power and clean drivetrain that you demand on your downhills. Making use of a 110mm bolt circle diameter, this four-bolt chainring is made from a high-grade 7075-T6 aluminium for a strong and lightweight transmission of power. With weights ranging from 66 grams for the 38 tooth version, making it just a small addition and a net efficiency over traditional rings. Recommended for use with a clutch-style rear derailleur for better chain security, Wolf Tooth's patent-pending Drop-Stop alternating wide and narrow tooth profile assure you of the ultimate in chain retention, giving you better security and confidence when riding hard and fast down rough and rocky descents. A minimal, open design to allow for the maximum level of mud shredding design, this chainring is superbly designed to help you in riding down rough and mucky descents and not being clogged up by the time you get to put the bike back on the car. Please Note: This is compatible for use with Shimano cranks only.