Originally Posted by
Jamesrigby
Sorry made a mistake. Yes i meant 15c internal frames on a boardman 2018.
Would 28 be the max?
There might be paving/gravel and the odd muddy path i.e canal path. Its Carlisle to Newcastle, hopefully not too extreme, but i dont want to damage the wheels. I won't be doing things like forest trails.
So more grip/comfort/less likely to damage wheels it the idea
Quit using the "c" reference - it makes no sense. Your rims are probably 15 mm inside width. Frame clearance is the issue that will likely limit your tire width. Of course a wider tire would fit better on a wider rim, but lots of people have ridden lots of miles on wider tires and narrower rims. There is not really an "upper limit" that you need to worry about.