Reaper, I did this on my RX1 and it did help a lot on hyfax wear. I replaced the 4 outside small wheels with yellow open wheels and also replaced the rear wheels with yellow open wheels in the stock diameter. Never ran this sled with the stock wheels, but when compared to my SXR there was a big difference in hyfax wear. I ended up replacing my skid with a expertx suspension. I have the yellow oversized and rear wheels offered to another forum member right now. If he doesn't want them, watch the forum for them to become available for sale.