Check the listing for details. Paul Component Engineering Melvin Chain Tensioner Black. Condition: New. Listed at 137.46 USD. Paul Component Engineering Melvin Chain Tensioner Black Paul Component Engineering Melvin Chain Tensioner Black Paul Components Melvin Chain Tensioner. Converts frames for single speed use. Long enough for a Dingle-setup, (2 rings, one cog) 20T max.Product Details: The Melvin uses two pulleys, just like a rear derailleur, which gives it 20 teeth of chain wrapWill work with multiple front chain rings while maintaining proper chain tensionThe pulleys are made of extruded and machined aluminum and have sealed bearings for durabilityPulleys are 2.25mm thick at the tooth which fits inside most narrow 6 through 9 speed chains, and the pulley cage is wide enough to allow 1/8? single speed chains as wellLong enough for a Dingle-setup, (2 rings, one cog) 20T maxDo not use with a coaster brake or fixed gearIncludes Paul's own Sealed Bearing Pulleys Specifications: Color: Black *** Please check all specifics above, especially on Forks, Wheels, and Tires. Photos are often stock. Axle, steer tubes, and other specifics may vary. Store Policies Welcome to our eBay store! Shipping: We ship domestic only. All orders ship free. We try to get everything shipped same day or next day. Because of same day shipping and multiple locations most cancellations can not be accepted. Unwanted orders should be refused or returned. PLEASE NO PO BOX's Customer Service: For all questions please contact us with via eBay Messages. Shop Info and Return Address: Allied Cycle Shop 23101 Gratiot Ave Eastpointe, MI 48021 Online Phone Hours - M-F 12 - 5pm EST © Copyright 2020 Bicycle Addiction. All rights reserved.