Well, on my 2016 Trek Domane 2.3, I have the stock basic Bontrager rims. I think the internal width measurement is 15mm, if I'm doing this correctly.
I have no plans to replace the rims. Just looking for a smoother ride, and thought 28s might help, with lower pressure than the 25's need.
My tire measurements tell me I can go to maybe 29mm in width tire at most, before rubbing occurs. That's why I wanted a 'true to size' 28mm road tire.
As I stated, my 25mm GP4k's are almost 27mm. They are almost ready to be replaced, thus the reason for my research.
Thanks
Thanks