Hey Ian. I am looking at a Speedmax CF. I am guessing that I am an XL but I want to double check as I am concerned that I won't be able to reduce my pad stack much (should I want to in the future) while maintaining 30mm of spacers under a TriRig Alpha One (apparently that will keep the stem inline with the bento box). By my calculations if I have 30mm of spacers then the mono bar will be at 30. Also, I am not sure if there are any aero advantages to a larger or smaller frame.
Pad Y: 700 (ctr pad)
Pad X: 535
6'5" tall with a 37.5 inseam.
If there is an argument for the Large then I would like to know. Thanks!
Sorry for the slow reply but if you're still working on this project I'd like to walk through a few steps with you.
You mentioned Pad Y of 700 to center of pad, I'm concerned about the Pad X of 535 being center of the pad or rear - that's the current pickle we're in in the bike industry, some measure to center, some to rear.
You are for sure an XL in the Speedmax CF. The Pad Y range on the XL is 634-721 so not only are you covered there but you have some room to move. The Pad X on XL maxes out at 533. Keep in mind that this is with the Canyon 90mm stem. You could put another stem on the there, the steerer and bar are all standard. But from your notes it sounds like you perhaps planning on using a Tri Rig bar and if that's the case you'll get a little bit more out of the Pad X as it has a range of 40mm while the stock Canyon set up has a range of 37mm.
Ian Murray http://www.TriathlonTrainingSeries.com
I'm all about athletes mastering triathlon
Twitter - @TriCoachIan