Belt guards don't work?
We had a belt guard on our Spyder, still on there actually. In 30,000mi of riding we had to replace one belt because of stone damage. Now, perhaps we may have had more stone damage without the guard, but I personally think it's luck of the draw. The belt guard is more like cheap insurance, you may need it, you may never need it. Meh, we just slow down a bit on gravel and not worry about it. I've ridden on chip seal, old pavement, down gravel driveways.
We had a belt guard on our Spyder, still on there actually. In 30,000mi of riding we had to replace one belt because of stone damage. Now, perhaps we may have had more stone damage without the guard, but I personally think it's luck of the draw. The belt guard is more like cheap insurance, you may need it, you may never need it. Meh, we just slow down a bit on gravel and not worry about it. I've ridden on chip seal, old pavement, down gravel driveways.