Reinforced by WTB's proven Dual I-Beam support, Proterra Tough rims feature a 30mm internal width to provide higher tyre volume while also increasing sidewall support at lower pressures. High-quality EZO sealed bearings are designed to endure through seasons of aggressive riding while a responsive 6-pawl freehub provides the snappy 5 degrees of engagement you demand when cranking out of corners. Choose Proterra Tough when you need a wheel that won't let you down.