I've been racking my brain trying to remember, but I'm old as dirt so that didn't go well. I feel like it was either 80 or 105 but I didn't save the instructions and don't remember for sure. If yours don't come with the specs I would try 80 first and if there is a lot of NVH maybe tighten it up to 105. Pretty sure 80 is 2 ugga duggas and 105 would be right about 4 ugga duggas.