Here's the standard in D.O.T. approved no-lug mounting

No lug nut removal required for installation!
Does not violate chassis manufacturer warranty.
Dept. of Transportation Approved!
60-70% fewer parts than other simulator brands
80% reduction in installation time over other simulator sets
Protective rolled edge for strength and handling safety
Easy removal for tire and wheel maintenance

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Aluminum or Stainless Bedcaps