18" wheels and T/A KO2 Fit - Ram Promaster Forum
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post #1 of 5 Old 03-19-2019, 06:40 PM Thread Starter
cacka_lacka
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Lightbulb 18" wheels and T/A KO2 Fit

Hi,

I'm going to need new tires soon, which has me thinking of some options. Sounds like most people are successful with fitting the larger 245/75/R16 on their Promasters. Instead of going that route, I'm thinking about 18" wheels while I'm at it. I've had good luck with BFgoodrich T/A KO2, and they make that tire in a 265/60/R18 which is the same diameter as a 245/75/R16. So, I'm hoping the 18" tire will not have clearance issues with the diameter. However, the 265/60/R18 is obviously wider... 0.8" to be exact. The offroad 5x130 18" wheels that I'm looking at are +48mm offset instead of the stock massive +68mm offset. This pushes the tire 1.2" farther out. With my eyes and some rough measurements, it looks like it could fit. Maybe some trimming/massaging of the wheel well/trim.

I have a pair of 40mm spacers that are ready to go above the struts to give the front end a bit of a lift and hopefully more clearance.

Has anybody gone down this road before? Any thoughts?
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post #2 of 5 Old 03-20-2019, 02:30 PM
MtBiker
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A 60's series tire wheel combo will result in a harsher ride. Just something to think about.

2017, High Top/159 WB, 2500 gas Promaster
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post #3 of 5 Old 03-21-2019, 06:28 AM
Mack
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I agree with Mtbiker, you will be compromising comfort for looks.

2017 2500 159" High Roof Gasser
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post #4 of 5 Old 03-21-2019, 08:19 AM
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You said your eyes show it could fit, is that on a 245/75R16? I would also want to turn the 245's in the wheel well to see if the 1.2" further out does not project into the tubs. I think they would look better than the 225's but the offset is what is really giving you the "look" imo.

I am going with 245/70R16 when my stock tires wear out. It is very close to the stock diameter so no speedo or MPG or gear ratio issues but It should be a bit better on forest roads / back roads.

Also, will the new offset create any steering pulling when it accelerates on a curve?
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post #5 of 5 Old 04-01-2019, 10:47 AM
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Please post about your progress on this! I've got a set of 245/70/17's that I'm planning to mount up on my van as we get into summer. I've also got the russian 40mm spacers that I plan to install as well. I'm really on the fence about attempting to install the spacers myself, so interested to hear how it goes for others.

2017 Carado (Hymer) Axion 136" 1500 V6 Gas
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