[sambam]

Thanks you all for your responses. I have a clearer understanding of load ranges and reserve capacities now. Dick sent me some info and I checked out the link from fauch and it makes some sense. But, how do you know what your reserve is at a given mph? OK, so you buy an LT tire with a speed rating @ 106 and a load range of 3042. How does that compute to 60-65 mph, which is where I'll be with the trailer on the back? Is there a formula? Blind faith? It seems a little ambiguous to me. I'm not trying to discredit the science, just trying to understand it. You all seem to know a bit about this so I'll keep digging 'til I get it, too.