30x9.50x15 vs. 235/75/15 Gas mileage, power loss? - JeepForum.com
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post #1 of 4 Old 04-13-2011, 05:43 PM Thread Starter
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2003 KJ Liberty 
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30x9.50x15 vs. 235/75/15 Gas mileage, power loss?

Okey doke, So Donald Duck -my '97 4.0 has the ugly 'sport/canyon/ 15x7 rims on it, currently wearing some 225/75/15 Khumo girly tires on it.

Today I scored 4 Ecco rims with 2 good 30x9.50x15 General Grabbers for $80 bucks . So I threw one of them on and I like the look, fits good.

So...I was going to only go with 235/75/15's on them when I bought new tires, but if I can find a couple more General Grabbers cheap, I might go that route.
-Question is how much power loss and gas mileage would I lose going with the 30's vs. 235's?

1996 Cherokee Country 4x4
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post #2 of 4 Old 04-13-2011, 06:57 PM
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its only an inch difference in diameter. i wouldnt worry too much about power loss with 30" tires.
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post #3 of 4 Old 04-13-2011, 08:18 PM
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you will barely notice, if you even do.

'88 XJ
'98 ZJ on 37s and tons
'02 Chevy 2500HD 8.1
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post #4 of 4 Old 04-13-2011, 10:04 PM
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1995 ZJ 
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That isn't a difference worth worrying over, 30's vs 235's, depending on the manufacturer 235's can be almost 30".
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