I purchased two of these belts for my Troy bilt tiller and installed both of them on the dual pulley setup. One of them snapped in around 5 minutes of tilling up last year's beds in my garden, not even breaking fresh ground. One of them is currently still on the tiller and is powering it by itself, which makes me believe there was a fault in that belt. I am ordering two more and will report back. Shipping was great and the belts and the order was correct, and for the price I can buy another one. I will update to 5 starts depending on my experience with customer service on Monday.