I live in Crystal River, Florida and I am wanting to get back into bike riding. When I was a kid I was a serious mountain biker in West Virginia. I have barely biked at all in the past 10 years. I have 6 year old or so Walmart Schwinn mountain bike. I like the frame but the rest is not that good. I was thinking of rebuilding it if I could. Any help would be appreciated. I want to get back out in the woods ASAP before I get any fatter.