It should be noted that the ~17.5 metric ton weight noted for the HEMTT on the wiki page is it's empty weight, it has a ~10 ton capacity in it's cargo bed, fully loaded it's about 28 metric tons (45 tons with trailer, all weights are in metric). The HEMTT is a "10 ton" truck after all.
As such I made a reasonable approximation found
hereEdit:
XTRO primitives II has the Randolph support vehicle a 35 ton truck (tracked) that carry's 9 tons (and tows about 35t), though it's been "obsolete" scene 2500...