Update: Got a snake-bite flat when I was riding on Sunday. I ran over a large, Chrome, truck-size lug nut. I limped home pumping up the air twice and just changed it tonight. I didn't have time on Sunday because we were going to dinner and I
couldn't be late. removing the rear wheel was very easy perhaps the vertical dropouts on the new bike versus the horizontal ones on my old bike made it easier.
Yesterday I rode my old bike and it felt strange.
When I bought the new bike I asked if 28's would fit and they said yes however 25's are what are on the wheels now. I would assume the brake caliper is the limiting factor and not the wheel size. see attached pic. Thoughts? TIA.