I want to switch my old, piece of crap frame with a slightly newer, better looker one. the new frame is 56cm, i'm not sure what the old one is exactly but i measured it to around 55cm. can i have them swapped or will it be much more difficult that i am thinking?

Hi! So I saw this forum advertised on reddit and I thought I'd join to see if anyone can help me with a dilemma I'm working through with my bike. I have a 1990's-era department store bike that I have, over the years, made a few upgrades to. I like it because with skinny tires and a comfortable...