Hi Ian,
Apologies for the delayed response here! Hopefully you’re still able to offer your sage advice.
Correct, seat height is 835mm. I also realized I’d said the drop from saddle to arm pad top was 95mm, it was actually 9.5mm.
Given these dimensions, with a seat tube angle of 80.5 degrees, I’ve “back calculated” my arm pad stack to be 814mm (thanks high school trigonometry)!
Correct me if I’m wrong, but it seems like the best fit, from my calculations, would be a Speedmax CF 8 DISC in Large, with a max armpad stack of 757 mm. Also, I looked at the rim brake CF 8.0 Di2, but it seems like the max armpad stack for that one is 714 mm.
From my fitting I’ve got the following additional dimensions re: Pad X/Y:
XY Tool - HB - X = 476 mm, Y = 660 mm
XY Tool - Rail - X = 202 mm, Y = 755 mm
I believe those XY measurement are to the handlebar, whereas I’m most interested in the pad locations (as most of my ride time will be in aero).
Hope this helps, thanks as always for your advice!
Chrtriguy,
I gotta have three numbers to prescribe:
Seat HeightPad YPad X. You’ve given me seat height at 835. Pad Y at 814, but I still need Pad X
I’m able to predict your Pad Y (I trust your math and it’ll be fun to confirm it) and Pad X if you can tell me how tall you are and what your inseam is - give me that in feet/in or cm or mm. I can do it from there. And I’m happy to prescribe BOTH at CF disc brake Speedmax and a CF rim brake Speedmax.