Mack

Static load rating: This is the maximum weight that can be added while the car is stationary. It can usually hold three times the on-road load rating. So, if you have a tent, that’s why you can sleep in it.
On-road load rating: This is the weight limit while driving on sealed roads. This is what the product load rating refers to .
Off-road load rating: This is the weight limit on unsealed roads. It is typically lower than the on-road capacity by 30%.

Mack Truck windscreen protectors, help prevent stone chips and cracks to windscreen