I'm looking for advice as to whether I should replace the tires that came with my pup... I got my NTU Palomino Y-series 4127 last August and it had the correct size tires (ST175/80R13) made in 2018, but they're C load range and the sticker on the side of the pup says to use load range D tires. According to the CAT scale, the pup is 2,900 lbs fully loaded, but the tires are only rated to carry 1,360 lbs. each (2,720 lbs total). However, the tongue weight is around 380 lbs, so the tires are actually only carrying 2,900 - 380 = 2,520 lbs. When determining whether I'm overloading the tires, should I go by the total pup weight, or the weight minus what's on the tongue (that is, only what the tires are carrying)? I hate to replace tires that are in good shape, and we've made several trips with no problems (yet). What do y'all think? Are we operating too close to the weight limit for those tires?