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Aerodynamics

Aerodynamics is at the heart of what we do at Parcours.  We have spent countless hours over multiple sessions in the wind tunnel to provide the level of data that you as the rider need to make an informed decision.

 

Follow the links below to find out more about each of our wind tunnel tests

Test 1: wheelset time savings

Test 2: disc brakes vs. rim brakes

Test 3: tyre choice

Test 4: handling stability

 

Standardised test protocol

  • All testing took place at the A2 Wind Tunnel in Mooresville, North Carolina
  • Front wheels only were tested
  • Each wheel was tested from 0-20 degrees of yaw, at 2.5 degree increments
  • Positive yaw angles cover non-drive side (i.e. brake rotor, where relevant, exposed to the wind)
  • Each test sweep was conducted twice, with results averaged
  • Test wind velocity at 30mph
  • The same tyre was used throughout, inflated to 100psi (consistent with previous testing)

Note: we did not remove tare (i.e. subtract the drag from the wheel clamp) for two reasons:

  1. In real-world riding, the wheel will have the fork supporting it
  2. As the wheel is rotated into the wind at higher yaw angles, one of the clamp posts will become increasingly “hidden” from the wind. Subtracting a simple tare value could therefore be misleading at higher yaw angles

    Note: we measured against a Shimano RS11 (rim brake) and Fulcrum Racing 5 (disc brake) wheel designs as benchmarks, rather than the commonly-used Mavic Open Pro box rim with a 32 spoke count. We believe this is more representative of the real-world benefits you will see from an upgrade.

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