My newest motorcycle,

'99 Suzuki SV650:

These are a couple of photos of my back tire after an hour, or so, of some aggressive twisty mountain road riding:

I was in a small town in the North Georgia mountains when the gear shifter knob broke off. I'm guessing the previous owner bent it back into position when he dropped it. I was right next to a NAPA auto parts store, so here's my fix (about $4 in parts - it worked okay):