The 4wheelparts.com website description of the Smittybilt Element Ramp notes it is "manufactured of Nylon Reinforced Plastic & each ramp can support up to 7,700 lbs".
What on earth are they talking about? Certainly not a bridging load. Maybe a static load on a supported surface? That seems to make no sense either -- a sheet of paper on concrete could "support" 7700 lb...
In addition, MAXTRAX note a weight of 7.5-8.4 lb (3.4-3.8kg) -- the values change at different places on their site -- for each track. If there really were $100 of polymer in each one ($200/pair) that's a polymer cost of over $12.50/lb. Ain't obvious how that's happening. There are polymers that cost that much, but not something like a (glass) reinforced polyamide (nylon), the stated material in the MAXTRAX and the Smittybilt. A value five times lower than that isn't impossible.
We all know the Aussies make great stuff, and expect to be paid for it. (I certainly have over the years). We also all know China (assuming that's the source of the Smittybilt ramp) will make the lowest quality it can get away with and sell solely on price.
I see the new MAXTRAX II has a three-rib design. Looks stronger as a result.
Exactly how good or how compromised this new product is remains to be determined. The price seems pretty steep yet for a Chinese knockoff. Where do you think Harbor Freight would be with these... twenty bucks a pair?