Not much help for your rally
, but one of these days, thereís going to be another large sized rally
nearby and Iím going to volunteer to do a tire seminar. Iíve seen the one the RV Safety Education Foundation gives (itís a good one but a little thin on light weight
trailer applications) and while I canít offer to weigh the trailers like they do Iím ready to explain tire stuff.
Things to address would be:
Tow Vehicle Gross Vehicle Weight
(GVW) and Gross Vehicle Weight
Tow Vehicle Gross Axle
Weight Rating (GAWR) (The manufactures assumes that the individual tire/wheel is good for half the GAWR which is significant when close to the limits since loads are rarely evenly divided left to right.)
Tow Vehicle Curb Weight
Tow Vehicle Payload
Maximum Trailer Weight
Trailer Dry Weight
Trailer Gross Axle
Weight Rating (GAWR)
Gross Combined Weight Rating (GCWR)
All these things relate to the load on the tires
Provide rated load for any tires
present at given pressures.
LT and ST (i.e. ST205/75R14C) tires
come right from the chart
P-Metric tires (i.e. P205/75R14SL) tires divide the chart load by 1.1)
Maximum speed ratings
Friction (tire contact patches) and momentum
Extra credit, or something to consider is to host a brief discussion (any lawyers present?) with respect to liability arising from an accident, insurance consequences or a ticket while operating out of specification.
Everybody gets to do pretty much what they want, but some might want to know the industryís expectations before going out on their own.
Perhaps you have a RV trailer tire retailer that could help out. The above could provide a list of topics to cover.