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Old 02-24-2016, 04:22 AM
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Tire Size Tech

Im sure this is a really dumb question, but I cant make sense of this stuff. It feels like I keep reading conflicting information everywhere.

My stock Sport S tire size is 255/75/R17. With a coil swap Ive gotten a bit more room underneath and I'd like to go a tad bigger in size. Im not really looking for tire width, but more height for ground clearance. More of what you guys call "pizza cutters" if you will i think. What would be the next common size up in height? What equates out to around 33" or so, as my stockers should be around 32".

Thanks!

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Old 02-24-2016, 06:51 AM   #2
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Quote:
Originally Posted by 68RR View Post
Im sure this is a really dumb question, but I cant make sense of this stuff. It feels like I keep reading conflicting information everywhere.

My stock Sport S tire size is 255/75/R17. With a coil swap Ive gotten a bit more room underneath and I'd like to go a tad bigger in size. Im not really looking for tire width, but more height for ground clearance. More of what you guys call "pizza cutters" if you will i think. What would be the next common size up in height? What equates out to around 33" or so, as my stockers should be around 32".

Thanks!
https://tiresize.com/ This site helped me

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Old 02-24-2016, 07:28 AM   #3
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for your wants a bfg ko2 in size 34x10.5-17 will be ideal. fit your stock rims and they run small for 34's so visually bigger than stock but not big enough to cause any issues.
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Old 02-24-2016, 07:35 AM   #4
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^^^ what jadmt said or Cooper makes the st maxx in a 255/80r 17 that would work as well. 255/80r 17 would be the next metric size up in height without going any wider.
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Old 02-24-2016, 08:02 AM   #5
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I just got the 34's mentioned above. Check out my build thread(link in sig) if you would like to see pics. Stock suspension on mine.
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Old 02-24-2016, 06:00 PM
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Awesome guys. Thanks for the help and links.
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Old 02-25-2016, 04:22 AM
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Good lord those BFG KO2's are expensive. Just about $300/tire. The stock tires on ine only have 500 miles on them...so basically brand new. Im not sure I can justify that much money on tires at this point. That doesnt seem to be a common tire size either, or the metric equivalent 255/80/17. Not too many tires to choose from. My plans re just light trail stuff for now, other than the Bantam Jeep Festival. I suppose my stock tires might be good enough for that stuff.
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Old 02-25-2016, 07:58 AM   #8
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Am I the only one who's Jeep came with 245/75/17's?!
I had the same thoughts as you on the cost factor. I've been to an off road park twice with stock (31.5"), and they did fine if I was careful in tricky spots, even tackled a pretty intense blue trail! But going to the 34's was enough for me to justify, and I thought my stock tires would fit on my other SUV, but they didn't so I'll try to sell.
If mine came with the 255's(32's), I might have decided otherwise.

You will do fine at Bantam with stock, they will put in you in a group with other stock Jeeps. See you in Butler!!
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Old 02-25-2016, 09:14 AM   #9
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Look at the offerings in the 285/75r17. That will get you right at 34x11. There are only a few options.

Use this for good visual comparison.

https://www.tacomaworld.com/tirecalc
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Old 02-25-2016, 12:57 PM   #10
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And remember the tire diameter is all a lie!!!!!

My 315/70/17s "should be" 34.4". They are really closer to 33.5-33.75"
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Old 02-26-2016, 04:26 AM
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Originally Posted by RuDawg7890 View Post
Am I the only one who's Jeep came with 245/75/17's?!
I had the same thoughts as you on the cost factor. I've been to an off road park twice with stock (31.5"), and they did fine if I was careful in tricky spots, even tackled a pretty intense blue trail! But going to the 34's was enough for me to justify, and I thought my stock tires would fit on my other SUV, but they didn't so I'll try to sell.
If mine came with the 255's(32's), I might have decided otherwise.

You will do fine at Bantam with stock, they will put in you in a group with other stock Jeeps. See you in Butler!!
Thanks for the information! At least I have some direction on what I should be looking for now!

Im definitely looking forward to Butler. It'll be my first time going. I registered for the Moraine Trail along with a few other things, including the playground/trails area. Definitely looking forward to it and Im glad to hear that I shouldn't be at too much of a disadvantage.

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