I bought a used bike on craigslist, for cheap, and while I wasn't expecting it to be great the brakes and changing gears don't work perfectly.
The front brakes are very tight and the back ones are pretty loose... I can stop and everything but just would rather have a better performing system.
The gears change but sometimes don't work that well and I have to move the shifters all around for it to "stick" in a gear. Is there some way to simplify the gear structure? I wouldn't mind a single or fixed gear transition (since I live in NYC) but still want the ability to coast and use my brakes (assuming I can fix those too)