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.

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″ 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