Needed to buy a spare for my camper, as the 17 year old one was kinda sketchy. Looks like it came with LRC's, and if I'm reading it correctly, LRC's are good for 1,360lb per tire (this is a 175/80 13). Trailer GVWR is 2,500lb. Which means... probably not too much, unless if I go and weigh it and make sure it's never past that weight. Since I won't pack much into it (no water, no ac, etc) I ordered an LRC just now, as I "need" that spare for this weekend. I can see why a maker would use tires that just meet the rating. But when do you jump up a range? I realize that in an ideal setting I'd have at least 250lb of tongue weight, so it'd be 1,125lb per tire, which is below 1,360lb. But is that conservative, or are the ratings such that one can go to 100% of rating, as they derated them for you?