Rim width vs tire width
I’m currently running Specialized Roubaix Pro 25/28 tires on 622x14c rims, and have to partially deflate them to clear the brakes when removing the wheel. I’m ok with this but I’m planning on upgrading my wheels and want to know what effect a wider rim will have on tire width? I haven’t decided on my new wheelset but let’s use 17mm wheel width for sake of argument. Going 3mm wider on the rim width will do what to my tires? Make them wider? Taller? Frame is a 2012 Specialized FACT 8R carbon frame. I don’t want to have to change tires but already don’t have much clearance remaining on the frame. As it stands I only have about 2mm clearance between the tire and the chainstays and the top of the front tire is starting to get close to the bottom of the fork. Is there a rule of thumb as to
“x”mm increase in wheel width = “y”mm increase in tire width? And will tire height change with a change in wheel width? Thanks.