Sunday\'s clutch-based coaster hub with a new, strong axle, bearing configuration, and drag mechanism design reduces the need for constant repairs. This hub features a simplified internal slack adjustment. Using only a 2.5mm hex key, simply loosen or tighten the grub screw to your desired slack, then put the hub back together. It includes a female axle with a 14mm non-drive side axle bolt and 10mm drive side bolt with built-in 14mm adapter. This configuration is lighter than a 14mm male axle. The 3/8” drive side bolt provides room for a long-lasting bearing system in the driver – one of the weakest points on traditional hubs. The 14mm non-drive side bolt allows for a larger bore in the axle. ###section### Product Specs HUB TYPE: Freecoaster AXLE: Female Bolts DRIVER: 9t SPOKE HOLES: 36h WEIGHT: 640g / 22.5oz