Jeep weight vs rolling weight

Plumber1

Tito's, Tacos and Trails
Original poster
Supporting Member
Joined
May 27, 2019
Messages
3,951
Location
San Ramon, CA
How does the static weight of a jeep vs the rolling weight make a difference ?

I have reduced weight on my Jeep by removing my Rock Hard 4x4 rear bumper, Hylft Jack and Rotopax gas containers that I carried all the time. After determining that I never ran out of gas on the trails that I do, and that after many years I didn't use the Hylft I decided to remove them. Also wanting to lighten the load a bit I removed the heavy bumper and installed a Savvy rear bumper. All in all I removed about 175# from the rear. I replaced my winch line from SS to Rope and saved a few more lbs. which I am assuming is all static weight.


Now its time fore new tires, I am currently running BFG MK2 35x12.50x15 which I am guessing is rolling weight. I am considering Huchinson Rock Monster wheels that I know everyone says are heavy but in fact are 10 lbs more than my current non-bead lock wheels. Looking at bead Lock wheels there is not a lot of choices in 15" that I like, so the other option is move up to 17's and new BFG KM3. When I look at the weights the same 35" tire in a 17" weights 8 lbs more than a 15". The weight of a 17" wheel is about 4 -5 lbs more than my current wheel. So if I stay at 15" w/ Rock Monsters my " Rollin weight " will increase about 10 lbs per corner so about 40 lbs. If I move up to 17's my " Rolling weight " will increase about 12 - 13 lbs per corner or about 48 -52 lbs.

So is adding 10 lbs per corner going to make much of a difference in the overall scheme of things since I have dropped about 185 lbs and looking to add back around 50 lbs including the spare ?

Just looking for your thoughts
 
Rotating mass in a Jeep application is not much different than any other unsprung weight. Lower rotating mass is more important when acceleration is involved, but reducing total weight is good where ever it is. I am surprised a 35x12.50x15 is lighter. The 17" tires prices are a bit more expensive too.
 
Rotating mass in a Jeep application is not much different than any other unsprung weight. Lower rotating mass is more important when acceleration is involved, but reducing total weight is good where ever it is. I am surprised a 35x12.50x15 is lighter. The 17" tires prices are a bit more expensive too.
According to BFG's website

35x12.50x15. Tire Weight. 66.07. Load Range C

35x12.50x17 Tire Weight 74.25. Load Range E