Wheel and tire size

[roberth1245]

Good Afternoon,

I'm looking to purchase a set of take offs Size 285/60R20 for my 13 3500 but concerned the wheel size will be a concern. Stock size is a 275/70/R18. Any thoughts would be greatly appreciated.

Thank you

 

[VelocityC6Z]

I don't see any issues.

Do you know the offset on the 20's?

 

[VelocityC6Z]

There's a lot to consider here really. What is the load rating on the old ones, and new ones as well. Weight of the old and new tires. Braking, mileage, ride quality... all things could be changed here going from 18's to 20's. Any details you have on the old ones and new ones, feel free to share.

In terms of "Will it fit? Will it affect my speedometer?" You're good to go, as the diameters are close enough that you won't notice a difference.

 

[roberth1245]

thank you for the information. this helped out a lot. the load rating is E and I'm going to assume the new are lighter given they are alloy and the original are steel

 

[VelocityC6Z]

The steel wheels actually are surprisingly light I've found. So are the factory 20's for their size though. So you're probably going to be pretty close on weight, which is great when you're moving up to a tire size that I personally think has better towing capability.

In the right application a lower profile tire (20" wheel) of the same size will have less wobble and side to side movement than a higher profile tire (18" wheel). The only drawback here is you may feel a little more of the road. I kept my factory 20" wheels and have e-rated tires for this reason. They're just sitting in my garage until I need them to tow.

For every day driving and fun off road expeditions I bought a pair of 17" wheels and tires that are c-rated. The ride quality between the two are like driving a completely different truck. The 20's with e rated tires weigh 84 pounds and the 17's with c rated weigh 81 pounds. The 20's have a better rolling resistance, and still get better mileage. Just sharing my experiences.

Enjoy your new wheels if you decide to buy them! Cheers

 

[roberth1245]

thank you