boing wrote:
Grill wrote:
Ex-cyclist wrote:
Grill wrote:
Ex-cyclist wrote:
General rule of thumb is 60mm above the base bar for good separation.Interesting rule of thumb as I haven't found this at all.
Care to expand on this? This was pushed out by Felt when they were doing a ton of testing at LSWT.
What have you found and how have you tested it?
I've found that the frame makes a difference, but ultimately rider position trumps all. Testing-wise, I've done many hours with AeroCoach. When I had to replace my Plasma 3 TT (with 30mm spacers), I specifically chose a larger P5 so I could run my pads directly on the basebars (yes I have a lower CdA now, obviously not entirely due to frame/bar selection, but by how much was surprising considering how much time I'd spent getting dialled on the Plasma).
https://www.instagram.com/p/BZiwcNml9MC/
That's interesting I currently ride a Plasma 3 small, with my missile evo extensions at their longest position. Similar to your self to ensure 3cm compliance I went out and brought a 54 P5 to get a bit of extra reach the got a tririg one for it. Because i have invested in 2 Newport sessions in the Plasma I have stuck with it though it is a bit battle scared. As a 172cm short arse I expect really a 51 P5 would be the frame I should be on, but have wondered if stack height via a larger frame is more aero than stack height via an aerobar.
I am hoping I can at least replicate my Plasma fit on the 54 so I can use it for training as the Plasma is set up as 1x which isn't always helpful for longer training rides in the TT position. Otherwise I will have to sell it and try and find a 51 P5 or P3.
Worth asking Xav what he thinks. I picked out the P5 in a 56 for 3cm compliance and got to right around the same CdA as my medium Plasma 3 in a single session. Came out ahead in the second session on the P5, and in the third, where I was no longer limited by 3cm, was way ahead. I suspect that the P2/3/5 performs best with no stack (and the right bars), and there are enough of the team on them to at least have it as a known quantity. If I could do it over, I'd probably only have gone for the P5 in a 54 if there was a compelling reason to run a different bar than the Tulas (as it stands I already struggle to get enough reach out of the 56).