Earlier this week I had an opportunity to spend some time in the tunnel with an emphasis on dialing in a UCI legal position. Ultimately my baseline (Giro AH helmet and NP P1 Suit) CDA was .196. With some adjustments, we lowered it to .187. Swapping helmets, suits, and wheels around resulted in a best CDA of .186 (Tempor and NP P1 suit)
Some takeaways with watts at 30mph
Velotec Dynamic / +2 watts and +5 watts at yaw vs NP P1
Castelli body paint suit / +12w and +10w at yaw vs NP P1
Met Drone WB / +17w vs Tempor
Giro Selector / +12w vs Tempor
Giro AH / +2w vs Tempor
Kask Mistral / +9w vs Tempor
UCI illegal high hands position was very similar at 0 degrees but my yaw CDA dropped -4 watts.
The 3 spoke light bicycle wheel vs 80mm spoke wheel was about 3w slower at 0 degrees and -7.5 degrees.
The Giro AH was the most consistent helmet for me and will be my go to if it’s windy and/or a course I’m not familiar with.
