Greetings Cruiser forum - happy to say this is my first post and my first step into Cruiser territory. And wanted to start my journey with an older Electra. I believe I have the standard C1, but not 100%. Got this from a local guy in Georgia who was selling a lot of his bikes (expensive mountain bikes) and this old girl was sitting in the back of his garage looking at me. I got it fairly inexpensive and feel fairly lucky as for some reason, Electra is back logged on stock and distribution now...and preferred to go with a used one.

This will be my basic beach, minimal hills cruiser, and need some help from the group here. Please understand - I am new, so some of these questions may be very basic. And of course, been googling a LOT in the last week or so.
I would like to upgrade the wheels/tires to something bigger. I saw kirby999 had a great post on his wheel upgrades on his C1, but not sure if my frame will allow bigger tires/wheels.

Right now I have standard Innova 57-507, 24x2.125's and hoping to see if I can upgrade to say 26" with some meatier tires.

Anyone know on this frame, what my maximum size is for new wheel and tire size upgrades?

I am also looking for an online shop to find some good prices on wheels and tires. Anyone have any recs? Again, not looking for titanium here - but just a solid wheel for basic durability.

I have a wonderful bike shop here in Marietta that I may hit up to see what they recommend, but would prefer to have a better idea here - before venturing in.

Many thanks in advance. Unfortunately I cannot post pics of my C1 because I am still under 10 posts...