Hope pro 4 mtb front hub 15mm axlehope hubs have proven their reputation for bulletproof quality time and time again thats why hope pro 4 mtb front hubs are the benchmark for all other disc brake compatible front hubs features15mm axlesealed stainless steel cartridge bearingshub shell machined from forged aluminium billetstandard 6 bolt disc fittingunsurpassed reliabilitylarger diameter flanges with no increase in weightbuy hope wheels tyres from chain reaction cycles the worlds larges