The Union Cycliste Internationale (UCI) is cycling's governing body, and as such they are the ones who regulate quality and safety standards and rules in order to maintain a fair and level playing field for all cyclists.
For any mass start cycling event to be sanctioned by the UCI riders bikes, wheels and safety equipment must meet the UCI's standards of approval.
While we build all of our wheels to the same standards, the 40mm and 50mm Urgency rim depths are the most popular amongst road riders participating in mass start events. So we have sought approval from the UCI for the 40mm & 50mm rim depths for both rim brake and disc brake wheels.
To achieve approval the UCI have an impact test which requires a 6.5kg weight to be dropped on the front wheel from a height of 400mm, we chose to drop a weight of 11.5kg and still our wheels passed the test comfortably.
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