I was able to squeeze 27 inch wheels onto a Huffy frame, but it was a really close fit. A 700c would work better. I had to change the brakes because the brakes for the 26 inch wheel didn't have enough adjustment. For a lot less money, search for a used bike that is better than the Huffy. Or you could find a used bike to get the parts from if you are intent on upgrading the Huffy. Be aware that some things will not be compatable.