They have a Flex-Core Zone which allows the Nylon Pad to conform to the curvature of the rim during use for maximum distribution of load

quiets chain noise and significantly improves life of driveline

such as a sleeping bag or a tent

A true high-performance product

Hope Pro 4 Front 6 Bolt Disc Hub - 20x110mm - 32 Hole - Orange Virtual Parent They have a Flex-Core ZoneThe 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. Specs: 15mm axle. Sealed stainless steel cartridge bearings. Hub shell machined from forged aluminium billet. Standard 6 bolt disc fitting.