Tire Size

[Duff44]

I have a 2014 RAM 3500, Tradesman and I want to put 255/80 R17. I currently run 245/75 R17 on Vision wheels. Can I go bigger without level kit? and what is that max size I can go without rubbing? Would I need spacers. Thank you.

 

[Racer9]

When considering tires, I go to a 'site like this; https://tiresize.com/comparison/
Your changes are a 1/2" shorter and about a 1/2" wider, I don't see that as a problem on a 3500.
I assume you mean spacers for the duals, if you have at least 2" of clearance now you should be OK.

 

[OC455]

You should have no problem running 255/80R17's (33.1 inches tall, 10 inches wide) on your truck. What I've seen you can go up to a 35 inch tire without a lift or a level.