Originally Posted by jrickards

OK, thanks, I'll have to keep that in mind. I've been looking for fenders and there are few (save for fatbikes) that are built for tires wider than 45mm even though the fenders are up to 52mm wide. I guess that the design of (say) 52mm fenders is to provide proper coverage for tires up to 45mm wide. Since most spray emanates from the centre of the tire, if the fender is a bit narrower, I'll just have to accept that. Besides ERTO code for a 55-622 tire (if I remember correctly) means that the tire is 55mm high, not necessarily 55mm wide.

I'll have to look at the space between the tire and various parts of the frame (seat post, BB, seatstays, chainstays) and see what I'm dealing with.