I went to Koblenz to figure out if my size is S or XS, and decide between the Ultimate and Endurace. I decided to get an XS Ultimate, but there were no bikes at all available then, so when an S Endurace cf8 popped up available I grabbed it. No regrets, I couldn't love the bike more than I do.
My friend has the same bike in XS (she is 2cm shorter) we swapped them while riding, I felt more comfortable on my "slightly too big" S, likely bc it's what i'm used to. i ride comfortably all day, but I do tend to pull my hands back a cm or two from the shifters on a straightaway.
My stem is 90mm, I'm considering replacing it with an 80mm, or 70mm. (I love my bike, but I don't pretend to know very much about bikes per se) so I expect this makes the bike slightly less stable and a bit more squirrely, in a nearly imperceptible way, but keeps me more in a comfortable hand position without shifting back and forth on/off the controls.
Any opinion or advice on how this might change my ride, or things to consider before making (or not making) a change? Thanks.
Edit: for anyone interested in the subject, this video addresses evaluating stem fit:
https://www.youtube.com/watch?app=desktop&v=HvOdjejXwg8
by abx400
5 Comments
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Similar situation : between two sizes. Got the bigger size.
Bigger bike feels more comfortable (higher stack), but I also pull my hands back. Considering changing the stem 10mm shorter and maybe playing with the ° rise.
Looking forward for the responses here.
I changed the cockpit of my Ultimate S from original 90mm for 80mm. I was too stretched before and now after the change (and I also placed the STI levers slightly upper) I don’t feel stretched anymore, it’s def more comfortable for me. And the bike doesn’t ride less stable at all. It was super worth it
I just chatted in to Canyon to see if a change from 90mm to 80 or 70 was in specified range, and they replied that 80mm is the shortest that is compatible.
I don’t know if that means 80mm is the shortest they’ve tested and are covered with insurance to advise, or if it’s the shortest recommended from a physics perspective. A follow up question didn’t get any clarity there.
I’m probably leaning toward 80mm like Pedro, but it is an easier choice not to go further to 70mm if there is a particular reason (including for instance voiding whatever warranty it may still have).
Actually, a shorter stem is more stable. Look at mountain bike stems – they’re 40-50mm. I also sized up on my Aeroad, with a nearly identical position in the size chart (but between M and L). The longer wheelbase it gives is more stable and I love that, and I have long arms so the reach is good too lol. Dropping the stem by 10mm is very significant in terms on impact to your body position, so you may want to lower it by 5mm or even 10, or try all three positions, when you get a shorter stem. Bike stability is largely down to rider body position, head tube angle, fork trail (the front wheel is not in line with the head tube, it’s slightly ahead – trail is how much combined with the HTA), and wheelbase. With you less stretched over the front wheel, it should feel more stable. Just be aware that on fast corners, you need to be conscious of putting weight on the front wheel.