Pretty good ideas especially the spare tire.
I wish I could find the link, but I'd once read a long article talking about why the SAE J2807 Tow rating standards became a thing.
The one-upsmanship on the max-towing of the trucks (And payloads) kept going up, and up, and up.
Even if there were no re-designs on the vehicles.
Apparently buried in the fine print, of the huge towing rating of the 450/4500 truck?
Was that the max towing number rating was available on a stripped down 450 truck, that lacked little things like a rear bumper, a spare tire, etc.
So yeah there's weight savings to be found if you're trying to get every little drop!
If you wanted to really go at it hard?
Swapping from the duratracs on the rebel to the Toyo AT3s saved 2lbs each IIRc. = 8lbs.
- remove tonneau cover and bed divider
- remove spare tire, and heatshield
- remove any steprails
- remove tailgate
- if desperate, remove skidplates
- remove the interior floor mats
- replace the stock huge exhaust setup with a muffler delete
Now re-weigh the truck.
That could be what, like 350lbs of weight savings or more?
None effected the vehicles safety, or on road mechanical function.
I don't know if I would do all of those, but hey there are some ideas in there!