The previous Pro 2 Evo hubs were renowned for their incredible versatility, primarily due to their adaptability to any common hub standard. The new Pro 4 builds on this further with a number of technical improvements and spec changes to reflect the growing popularity of road and CX bikes along with providing increased stiffness to the modern larger wheel sizes, without any weight penalty over the previous Pro 2 Evo's.
Key changes over the Pro 2 Evo include: -
• Longer freehub body which is compatible with 11 speed road, traditional MTB, Sram XD & Campagnolo cassettes
• Increased flange diameter which provides increased stiffness
• New 44 tooth freehub ratchet giving a quicker (8 degree) engagement
• Larger inboard freehub body bearings giving improved durability