Suggestion: Take your wheel into a LBS and see if you can find a brand/model of tire that'll more easily go onto the rim than your current tires. You might have to get a larger tire to find one that works (go from 25 to 28 or even 32); hopefully your fork & rear stays clearances will allow something larger if needed. I've done this as I like to make flat tire repairs on the road as easy as possible.