Rotary 11845 Deck Drive Belt - Compatible with Lawn Mowers & Tractors - Durable Replacement Belt for Smooth Performance - Perfect for Lawn Care & Landscaping

I bought this for my 2006 Toro LX25 riding mower. It arrived quickly, appears sturdy and well made, and the price was right. I'm not sure if I have to have a twist in the belt when installing it. It works fine but can fall off when I disengage the PTO. I'll have to check with my local Toro service center to see if I have to put a twist in the belt between pulleys to help tighten it up a bit. If anyone knows this answer it would be appreciated.