Note: The Formula Air Cap Removal Tool or a 38mm 12 point socket is required to access the air chamber

but that is a preference thing

The slightly swooped tail helps you get behind the saddle on the gnarly bits of trail

Suitable for both male and female riders

Fits all 20mm (3/4 inch) webbing

Hope Pro 4 Rear 6 Bolt Disc Hub - 12x142mm - 28 Hole - XD Driver - Orange eBay Note: The Formula Air CapThe Pro 4 is an incredibly versatile and easily serviceable hub that builds upon Hope's reputation for bulletproof quality and attention to detail. The hubs are machined from a single billet of 2014 T6 aluminium and run on stainless steel sealed cartridge bearings for smooth running and outstanding reliability. The 4 pawl ratchet system has 44 teeth with solid and reliable 8. 2 deg engagement with that unmistakable Hope sound. The Pro 4 spoke flange