How accurate is this? Static weight added when going from 32" to 33" tires

[BATomov]

Sponsored

 

[Gvsukids]

Gotta be true, it's on the Internet.

 

[professorkx]

I think this is referencing unsprung vs sprung weight. When I was racing off-road motorcycles, we paid a lot attention to unsprung weight, as we spent a lot of money and time tuning suspension for high speed desert. Not sure why it matters on a Jeep that sees mostly road use and low relative speeds. A few pounds difference in tire weight just isn’t going to be noticed until the suspension starts to cycle at higher speed and more diverse terrain.

 

[Overland_Dreamrz]

I'm guessing it is as accurate as this is (which is likely 100%)

 

[Steel City]

Switching from a 31 inch tire to a 33 you'll gain about 13 pounds per tire and significantly increase the rotational inertia due to both weight and the added diameter. As a result braking distances will increase measurably and pads will wear out more quickly. Fuel economy and acceleration will suffer. Suspension and steering components will have to work harder and larger, heavier tires put much more stress on driveline components: axles, differentials, CV joints and the transmission. They will also negatively affect your gearing, especially in low range.

 

[AmishMike]

Braedon, why are you asking? Just curious is okay. If you are worried about how it will affect you and your truck, way too many variables.

 

[BATomov]

Braedon, why are you asking? Just curious is okay. If you are worried about how it will affect you and your truck, way too many variables.

mostly curiosity, in theory my final driver ratio should go down when I go to a larger tire then I should be more fuel efficient at highway speeds.

 

[AmishMike]

Well........yes in theory. Bigger tire, lower transmission gear, same effective drive ratio. The benefit would come downhill with a tail wind in top gear.
There are tons of threads about this.
I did get an increase in mpg with taller tires, but it was due to the switch from M/T's to A/T's and less rolling resistance etc.. (Yes, I have an automatic)

 

[professorkx]

mostly curiosity, in theory my final driver ratio should go down when I go to a larger tire then I should be more fuel efficient at highway speeds.

Yup. I saw this on my JK moving to 37 inch tires, as mileage went up to just over 19mpg.

IMHO, roof racks and other items hanging off the side of the Gladiator will have a much bigger impact on mileage than a few pounds per tire. I added a roof rack to the JK for one 10 day trip and my mileage went down about 4 mpg on the highway. The roof rack now sits upstairs in the shop. I might modify and install on the 47, but not adding anything to the roof or sides of the Gladiator. Keepin’ it as arrow dynamic as a brick can be…

 

[Sandman 4x4]

It’s not just tire weight, but are you using the same stock wheels? The issue here is what’s called unsprung weight, the ultimate enemy of power to the ground from a dead stop and highway speeds that hinder the power taken to spin the wheels up. Not to mention the stress on shocks, springs and every bushing.

Sponsored