They have a fit calculator on their web site that you should try. And then call them. They are very helpful.

Canyon's size M is actually a 56.

---

What's your CdA?

Yes, the fit calculator says S.

Check out this tool. Compare your old bike and see how stack and reach are different

https://geometrygeeks.bike/

I want to throw another thought in here.... There are Ultimates for sale with a "cockpit" - that is to say a custom, molded, OEM, stem/bar combo - one might even exalt to call it a "super bike" and then there are "mortal bikes" in the Ultimate line that use a normal, everyday, common stem - that you could swap out with ease to help make your fit perfect. In my mind that has a big impact on the choice.

Ian

---

Ian Murray
http://www.TriathlonTrainingSeries.com
I like the pursuit of mastery
Twitter - @TriCoachIan

They seem to run large from my research/single data point. I'm 6'3" have a Large Endurace that nets out to about what 58-60cm frames for most other manufacturers make (my other bikes are a 58cm/XL Felt IA and a 60cm Trek Madone from 2010). Their 2XL frame must be massive.

I'm 5'10", 32.5 inseam, and I have a small. Fits perfectly - unless you have long legs the M will probably leave little seatpost exposed. Plus you go from the smaller handlebar width to the next size, which having a M inflite, is a bit too wide.

---

Chasing PB Podcast Latest interview with Eli Hemming on Targeting a US MTR spot in Tokyo

 
What a coincidence! I am 5'10" and 32.5 inseam. Do you have the Ultimate model?
I'm 5'10", 32.5 inseam, and I have a small. Fits perfectly - unless you have long legs the M will probably leave little seatpost exposed. Plus you go from the smaller handlebar width to the next size, which having a M inflite, is a bit too wide.[/quote]
Thank you guys for all your help.

Do you know what stack and reach you need?
Sizes 54, 56, S, M & L are all pretty vague and unhelpful if you have a decent idea already what fits you. If you already have a bike, and your happywith it or know what needs to change; I'd use that as a starting point. Knowimg what other people your height use can't be relied on as much as you may wish.

However, if you really want anecdotes.
I'm 1.78m (5'10") with about 835-840mm inseam. I got a size M Ultimate CF SL in 2014 and have been very happy with the size ever since. It was definitely the right choice. I remember when I was searching, there were several bikes I considered with very similar stack and reach. Some were 54, some 56. Use stack and reach or a geometry go

I am 5'9" and just picked up an Aeroad size small. It fits and feels great. I was previously on a 54.

Yep I'm on an Ultimate!

---

Chasing PB Podcast Latest interview with Eli Hemming on Targeting a US MTR spot in Tokyo

I'm also your same height, and I'd go with a size Small as well...

You could also most likely fit on the medium, and resale would probably be easier on the medium too, so that's a consideration.