You can fit something like a 40-42c in there.@Ezliven are the 32mm tires stock? and do you know what MAX width is for Domane? im on fence of getting one (also thinking about Allant as i'd do some city errands too). And @drodg I just sold my Creo EVO e-gravel bike, it was SOOOOOO slow and poor range. I own a Levo SL with the same motor, and LOVE it on my MTB (I do miss the torque of my previous levo) but, the low weight is pretty insane and I have the extender. For road riding/commuting though, that creo was a toad, was not what I was expecting, FYI....I demo'd a trek super commuter a year ago and was hooked on that speed for the road. (I still have a bad ass carbon road bike, that I just assume ride on the road, as the creo wasnt enough power).