Ridden Thomson posts for years. Have never snapped one of those bolts, they are pretty tough. These Truvativ bolts are really cheap aluminum. I bet if you smacked one with a hammer real good it would actually smash into a flat aluminum pancake. If the bolt were made out of brass or steel we wouldn't be having this conversation.I've snapped two Thomson brass bolts. One was on a 10' drop and I got lucky that my post let me off easy. One snapped on a small drop to flat, but it was prolly too tight.
I'll tell ya what I friggin did:
I marched straight the hell into the LBS and well, um, just ordered a couple more for backups.