Check the listing for details. Paul Component Engineering Melvin Chain Tensioner Black. Condition: New. Listed at 155.99 USD. Powered by Frooition Paul Component Engineering Melvin Chain Tensioner Black Item Description Paul Components Melvin Chain Tensioner. Converts frames for single speed use. Long enough for a Dingle-setup, (2 rings, one cog) 20T max. Features:The Melvin uses two pulleys just like a rear derailleur which gives it 20 teeth of chain wrap Will work with multiple front chain rings while maintaining proper chain tension The pulleys are made of extruded and machined aluminum and have sealed bearings for durability Pulleys 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?Ç? single speed chains as well Long enough for a Dingle-setup (2 rings one cog) 20T max Do not use with a coaster brake or fixed gear Includes Pauls own Sealed Bearing Pulleys Specifications:Color: Black $155.99 NEW Paul Component Engineering Powered by Frooition Frooition Frooition | No-js Template | eBay design, eBay store design, eBay shop design, eBay template design, eBay listing design (ver:froo_no_js) This listing is currently undergoing maintenance, we apologise for any inconvenience caused.