One of the two bolts (lower bolt) that hold the handlebars in place on my Schwinn High Timber MTB has started to come loose, causing the handlebars to be wobbly and insecure on the bike. I attempted to tighten the one problematic bolt and it seems to be stripped, I couldn't really get a good turn on it... I had no problem tightening the other screw so I don't believe it was a matter of using the wrong size allen wrench.
Can anyone tell me a.) is this a standard bolt and b.) where would be the best place to get a replacement?
Your suggestions would be greatly appreciated!