. Designed to convert your Hope Pro 4 100mm to Boost sizing, this easy to install spacer helps to increase rigidity & handling when taking on bigger & bolder routes. Fitting to the driveside of your hub, it extends the axle by 10mm to reach the Boost standard.
Features: Genuine Hope Spacer To maintain correct wheel centring, it will need re-dishing by 5mm. Buy Hope Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.