Want to build a single speed without having to buy a dedicated frame? Try the Melvin. The Melvin bolts to the frame where the rear derailleur would normally go and allows the use of a single speed rear wheel on bikes with vertical dropouts.
- Machined aluminum tensioner bolts on to derailleur hanger
- Adjustable spring tension and dual floating pulley
- For frames with vertical dropouts
- Fits hubs with 22-28Mm chainline (From inside of dropout)
- Made in USA