New Tire Load Index Question - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 6 (permalink) Old 10-13-2016, 09:09 PM Thread Starter
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New Tire Load Index Question

Alright, I scanned through most of the threads here dealing with load index but I have a question. I currently have the standard P245/65-17 HANKOOK DYNAPRO ATM RF10's with a load index of 105 and I love 'em. I found a deal on the same tire with a load index of 111. Is there any reason I would have an issue with them? Would it greatly affect gas mileage? Opinions welcome! Thanks...
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post #2 of 6 (permalink) Old 10-13-2016, 09:22 PM
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I have a similar question. I'm looking at Goodyear Duratracs and considering 245/75/17 instead of 265/70/17. The 245s have a load/speed index of 121 while the 265s are 115. 245s also have a lower speed rating of Q vs S. Would there be any noticeable difference?

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post #3 of 6 (permalink) Old 10-13-2016, 11:44 PM
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from what I remember about load/speed indexes... no you wouldn't notice a difference. it's the rating at which the tire can withstand ripping apart for a given tire RPM, and I believe standard passenger tires are good up to 170 - 190mph or something like that. If they were rated higher than that, you'd noticeably be paying much more for your tires.
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post #4 of 6 (permalink) Old 10-16-2016, 10:01 PM
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What I understand about load index is capacity rating of tires and doesn't directly affect mpg. For mileage, look into size and tire compound with the respective road resistance, observe the better tire pressure as well.
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post #5 of 6 (permalink) Old 10-17-2016, 11:43 AM Thread Starter
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Hmm, I didn't think about mileage differences. I'll look into that. Thanks!
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post #6 of 6 (permalink) Old 10-17-2016, 02:11 PM Thread Starter
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Well, they are the same 50k so that's good. Either way, my last set really lasted a long time.
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