The 7300 is a good bike, if it's in nice shape. That's a good size for you, and the upright style is easy to jump on and go; easy on the back, don't need a lot of core strength. If the rear wheel gives you trouble, you can buy a new 36 spoke for about $150, and you're good to go. Many miles down the road, if you want to be a roadie, you can upgrade without taking a big hit on resale.
Slow, steady progress can take you as far as you want to go. Right now, you just have to think about going a little further, or riding a little longer, than you did the week before. Learn to love the diet, and make time to enjoy the bike. Stick with it! Good luck.
Edit--saw the ad--looks like a very good deal--jump! p.s. Go Reds; Go Bengals!
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Last edited by chewybrian; 08-15-10 at 11:24 AM.