Do youself a favor, and don't mount em perpendicular to the ground. We've had ours a year now and our first trip up to northern Wisconsin they were already worn down 2" and would no longer reach the hangers. (It was a good snow year up there too) So we complained and they sold us a replacement kit for like 45 dollars, that's just the springs, and recommend about a 15-20° angle. So far we've done 3 more trips with alot better results. Now you do have to grind about 1/4" off of (I think) the right side of the coiled spring. As it bottoms out in the housing and won't go that far, but the other side you can just back off and tighten up. There's so much tension on that spring that you'll never notice the difference. But we've come to realize that these are going to be a high replacement item if we keep em (at least once a year). You may have better luck than us though with those 2" paddles.

Mine does not have a r and L on them… would’ve 100% mph red them backwards if this video wasn’t here