When it comes to skid plates, you just can't beat UHMW. I was a little disappointed that Kawasaki only offers HMW for it's a-arm guards and trailing arm guards. Their factory skid plate is also advertised as HMW, but I don't have one so I can't confirm that. That is why I went with Tusk for my skid plate. It's a 3/8" thick UHMW. Awesome stuff! Unfortunately, at the time, Kawasaki had the only a-arm/trailing arm guards available, in HMW, so I bought those. You can easily flex them with your hands, but anything is better than nothing. Trailing arms, not such a big deal to me, since they sit flat against the arm. Don't need a lot of strength to provide protection like that. The a-arms are a whole different animal. They do need some strength in the guards to try to protect them. Pulled my OEM HMW guards off yesterday in preparation for going in tomorrow for the upgraded a-arms and knuckles. I was surprised to see the wear on them. Glad I had them on there, but was truly surprised to see any real scarring. My Tusk UHMW skids basically have no marks or scars on them, and I have had the full weight of the KRX on them sliding over rocks.
The dark scars on the HMW (I know, not a great picture) are permanent. You can feel where it has ground down. Almost feels like it was done with hot steel and melted away the HMW material. UHMW is so much harder/stronger and durable, there would be no marks on it. Just no comparison between the two when it comes to true protection. I'm glad the scars are on the HMW and not the a-arms themselves, but it tells me it's time to find a UHMW replacement for them.
The dark scars on the HMW (I know, not a great picture) are permanent. You can feel where it has ground down. Almost feels like it was done with hot steel and melted away the HMW material. UHMW is so much harder/stronger and durable, there would be no marks on it. Just no comparison between the two when it comes to true protection. I'm glad the scars are on the HMW and not the a-arms themselves, but it tells me it's time to find a UHMW replacement for them.