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Two weeks ago my girlfriend decided that we needed a new exercise to start losing weight. I weigh 300 pounds, so it was really about me losing weight more than her.
I was originally against the idea because the last time I rode a bike, I broke it while going to the convenience store to buy more food to stuff myself with. Truly a fitting punishment for my bad lifestyle choices. I weighed 330 at the time. After I broke it I was too embarrassed to try and ride again.
I tried jogging and eating better, which is how I lost the original 30 pounds, but I began to get shin splints and that hurt like hell, forcing me to stop exercising for days at a time while I healed. After some research we found that due to my weight, bicycling and swimming were likely our best choices for low/no impact cardio exercises.
Since there is no pool that is easily accessible nearby, we opted for bicycling. I bought a Huffy Vantage 3.0 because it had the plus tires and it could support my weight. Regular tires can't. I didn't think I'd like it very much at first, but I've actually been loving riding the local walking/jogging trail at the park and around my neighborhood. But I couldn't help but notice two glaring issues with the bike.
The first, and most annoying, was that when I try to shift into the lowest gear on the 3x crank set, the chain stays in second gear for a long time. The only way I can get it to actually go into the next gear is by shifting my rear derailleur into a higher gear. If I don't do it this way the chain will sometimes come off. It's like a gamble, sometimes it'll fall, sometimes it'll shift.
Could this be a problem with the chain length? Or is it more likely a problem with the set up of the front derailleur? If neither, what is the most likely thing it could be.