Hope Pro 4 Trial - Single Speed Rear 6 Bolt Disc Hub - 10x135mm Bolt-Up - 32 Hole - Single Speed - Silver Envelope Shipping Two available volume sizes: 100cc

Two available volume sizes: 100cc high volume - 160g

4V Lithium Battery Pack

Hat and Helmet-Fit Temples - O-Matter temples have been designed to be low profile to fit with hats and helmets

durable tyre that offers excellent grip and rolling resistance

Limited Lifetime Warranty

Hope Pro 4 Trial - Single Speed Rear 6 Bolt Disc Hub - 10x135mm Bolt-Up - 32 Hole - Single Speed - Silver Envelope Shipping Two available volume sizes: 100ccThe 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