I spotted an old red Schwinn balloon tire bicycle last Fall stacked in the back room of my favorite LBS, and the owner gave me a great deal on it. I'm finally starting to work on it. Last night, I sanded off some of the housepaint and found that it looks like it might be a stripped girls Schwinn hornet (no tank, lights or rack.) I started to get excited when I saw white pinstripes under the red housepaint! The serial number on the back starts with J85. The original tires were too worn to read sizing, and the rims are 20" without tires. (Would that make the tires 24"?) I originally thought of sanding down and repainting, but I think I'm just going to lightly sand the housepaint off of the frame and rims to show the original detail for a vintage look. I don't plan on doing anything fancy to it, but I do want to purchase new tires to make it a rider. How can I tell if the rims are S2 or S7, and where can I purchase strips, tubes and tires? (I'm thinking either ww or cream/white.) Also, is it feasible for an adult to ride it, and what modifications should I do for this purpose (longer stem and seatpost, different handlebars?) Thanks in advance for any thoughts/suggestions!