What is the MPG difference between 18" and 20" tires on 2500 diesels

Asked by Nov 24, 2014 at 02:04 PM about the 2010 Dodge Ram 2500

Question type: Car Customization

2014 Ram 2500 diesel megacab

1 Answer

20,840

Nothing you will ever notice. Just because the rims are lager the outside diameter of both tires are very close to the same. Look at the size difference in the sidewalls of both tires. The 20's have less sidewall than the 18's. I hope this makes sense to you. Its a little hard to explain over a post.

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