Zipp Vuma Chrono Crank

Zipp Vuma Chrono Crank:
It took years to develop the VumaChrono and by the time Zipp was done, even their engineers were stunned by the results: 9 seconds faster over 40km compared to the next fastest TT crankset. That's about the same as taking 12 spokes out of your front wheel (which we do not recommend). It was also 25 seconds faster than the fastest road crankset! But VumaChrono breaks new ground with more than its radical shape.

It has a unique, spider-less design and the outer dome is a few millimeters wider than the teeth themselves. The outer chainring is held in place by 9 screws around the perimeter of the carbon face. Meanwhile, the inner chainring sits flush against the interior face of the carbon, all the way to the bottom bracket cups. It has its own set of bolts, making the VumaChrono the first crank designed to accommodate both single and double chainring setups. At just 860g, it also happens to be the stiffest crankset we've ever tested for chainring deflection - by a factor of 10. It also features an ultra-narrow Q-factor of 146mm.

The Chrono features an ultra-stiff, 30mm spindle and ultra-smooth American-made bearings with a ceramic bearing upgrade available as well. The Chrono is compatible with 68mm bottom bracket shells with English or 70mm Italian threading, and is designed for Zipp external bottom bracket cups.

Options:

Lengths: 170mm, 172.5mm, 175mm, 180mm

Gearing: 53x39, 54x42, or 55x42



Shipping Weight: 5 lbs.

This item ships for free anywhere in the continental United States!