Velocite RT50 road tubeless wheels aero data

We recently took the new 3rd generation Velocite Magnus carbon road bike to a nearby wind tunnel to set a baseline for future projects and to help correlate our CFD aerodynamics simulation data.

Velocite magnus at the wind tunnel
Velocite Magnus with Velocite RT50 road tubeless wheels in the wind tunnel, mounted on an instrumented plinth that spins the front and rear wheels. The drag force is measured independently at the front and at the rear anchors.

During this wind tunnel session we also took the opportunity to see how well the Velocite RT50 road tubeless carbon wheels (50mm tall x 23mm wide) wheels perform versus a lower profile but wider prototype wheels (25mm tall x 26mm wide). Both were using Maxxis Padrone road tubeless tires giving the effective profile of 65mm for the Velocite RT50 and 38mm for the prototype wheels.

Since this was a science based wind tunnel run, we ran it at just two effective angles of attack 0 and +10 degrees. The air speed was 42 km/h, air temperature was 32 degrees C.

The data was not overly surprising with the Velocite RT50 wheels being aerodynamically superior to lower profile, wider prototype wheels. The chart below summarizes the results

It is interesting to see that the Velocite RT50 aerodynamic advantage over low profile wide prototypes is the greatest at 0 degrees angle of attack, and greatly smaller when the angle of attack is 10 degrees.

In terms of power (assuming that each Watt is worth 10g of drag), the Velocite RT50 wheels save 17.2 W at 0 degrees and 5.2 W over the low profile prototype wheels.

Thus even when compared to contemporary low profile wheels the 50mm profile Velocite RT50 will offer an aerodynamic advantage, and energy saving (or free speed) when rising at race speeds.

The Velocite RT50 wheels are now in stock and can be purchased from our website here: Velocite RT50

They may also be available through one of our retail partners whom you can find here: Velocite Network