Quote:
Originally Posted by Katrina B
[...] I’m thoroughly confused by towing lingo and math. [...]
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The math is pretty simple. These steps can be done in any order, but there are three important steps to figure out and a 4th step of the final calculation:
1. How much can your truck handle. There are a bunch of different ratings, but for 1/2 tons and below, the most important rating is typically available Payload. This is on your yellow sticker that shows you have in excess of 2,000 lbs. This is just a proxy for your truck's GVWR.
2. How much do your occupants and cargo weigh. So, you can load up and go to a scale or you can estimate. Count up the fully clothed weights of anyone in the truck (e.g., Dad 180 lbs, Mom 120 lbs, Kid1 100 lbs, Kid2 100 lbs = 500 lbs of human being in the truck). Then, add up all the other stuff in and on your truck ... everything in/on/attached to your truck that wasn't there when leaving the factory needs to be added: stereo upgrades, light bars, new grille, Line-X bed liner, bigger tires, duffel bags, toys, games, clothes, pets, bikes, tools, firewood, etc. Add all that stuff up.
For illustration purposes, let's assume this ends up being 724 lbs (500 lbs for people and 224 lbs for everything else). Your number will be different.
3. How much will a trailer drop onto your hitch. In this case, your trailer is 7,500 lbs. Figure 12-15% will be on your hitch. 13% of 7,500 lbs is 975 lbs. Add 50 lbs for the WDH: 975 + 50 = 1,025 lbs on your truck from the trailer and hitch.
4. Now do the math: Payload - Occupants & Cargo - Trailer = 2049 - 724 - 1025 = 300. You still have 300 lbs of payload remaining. You're within limits and doing well.
Note that you can work in many directions. For example, how much trailer can you tow with that truck? Again, you start with your occupants and cargo number:
Payload - Occupants & Cargo = Available Payload for Trailer
2049 - 724 = 1,325 lbs. Subtract the 50 lbs for the WDH and you're left with 1,275. Using that 13%, that means that the
GVWR of your trailers you're shopping for should be 1,275/13% = 9,800 lbs or less.
You could work from the trailer. How much vehicle do I need to tow a given trailer:
Payload >= Occupants & Cargo + Weight From Trailer
724 + 1025 = 1,749. For this trailer and for this load out (occupants and cargo), you'd want a vehicle with at least 1,749 lbs of available payload on that yellow sticker.
Hope this helps.