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Discussion Starter #1
Looking at getting a new set of tires for my 2014 ram 1500.
Stock tires are 265/70r17 but now have 18” rims and looking at 275/70r18 tires. Have seen a lot of info about not exceeding 3% for tire size increases and also a lot saying that it wouldn’t hurt as much as people say.

just wondering if anyone has any input on what kind of impact I could expect on other systems of the truck by going to the larger size

thanks
 

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Red Trucker
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What gears do you have? Your new tires would be almost 2" taller. This will throw your speedo obviously, but it will also change your final drive ratio a bit. If you have say 3.21's, they're gonna feel probably closer to 3.08's with the extra height. You also didn't mention the width on the 18's; going to a 275 safely without a bunch of sidewall bulge usually requires a 9" wide wheel. Other than that as long as it's the same size tire front and back (if 4x4) it won't affect anything else.

629338
 

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Discussion Starter #3
Thanks for your reply. The rims I have are 18x9 mayhems so we’re good there and it’s 3.92 gears 5.7 Hemi w/6 speed tranny
 

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Is this a 1500 or 2500? Ram 1500's got the 8sp starting in 2013.
I got robbed! My 2013 ram 1500 has a 6 spd tranny
And I went with the 18s and my trk rode a lot better. Especially on turn radius, but that was a 2008 dually, I’ll shut my mouth now😬
 
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