The Radio Sonar 135 Rear Hub is a revolutionary MTB freecoaster hub from Radio Bikes. It features a lightweight design with adjustable slack and zero drag for fast rolling. The unique MagnaDrive magnetic pawl retention system ensures durability. This hub can be easily converted into a cassette hub and is the result of collaboration with Radio MTB team rider Niklas Tilk. It has 135mm spacing, a disc mount, and options for a 10t or 12t cog driver, making it a versatile and maintenance-free choice for high-performance trail riding. SKU: RAHU101-01-BLK.