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Tire Size '84s

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Old Dec 30, 2009 | 05:49 PM
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Default Tire Size '84s

So the size I have on there now is 255/50/16 and they always seem to be ~$110 or more.......~$250 for two mounted and balanced out the door.

Today, a guy told me $81 for a Kumho if I switched to a 245/50/16

The difference is about 10mm in width.

Would that make a difference? I can't see 1/2" making that much of a difference.
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Old Dec 30, 2009 | 06:06 PM
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The 245/50 is also going to be at least 1/2 less in diameter and that will make a small difference in the speedometer and odometer readings. The 245/50 is suitable more for a 7" to 8.5" wide wheel. If you have 16x9.5" wheels on all four corners, I would stay with a 255/50-16 tire as that size is correct for the 9.5" wide wheel

IMHO, spending the roughly extra $120 for the proper size tires is worth the money.
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Old Dec 30, 2009 | 06:21 PM
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^^LOL...

So when I run all the tread off my tires......I can tell the Cop that I didn't know how fast I was going because my tires were bald??

OK OK, I'll be serious.

Speedo would be off by how much?? If it is negligible.....I might take that savings
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Old Dec 31, 2009 | 02:02 PM
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Your talking about a $250 savings over the life of the tires, maybe 3 years? That comes out to less than two tankfulls of gas a year. Go with the correct tires and your car will handle better and not look funky.
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Old Dec 31, 2009 | 04:56 PM
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Originally Posted by jhammons01
Speedo would be off by how much?? If it is negligible.....I might take that savings
Tire Rack or another site should have a table or calculator for you to know exactly. 255s have a shrinking market, so they've been disappearing/becoming more expensive. I suspect that the error is within the factory tolerances, anyway.

I'd rather go larger than smaller if saving were my goal. that said, please martyr your billfold and get the 255s so the market remains.

:w
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Old Jan 2, 2010 | 11:50 AM
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Here is a great site to compare tire sizes:

http://www.miata.net/garage/tirecalc.html
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Old Jan 2, 2010 | 06:28 PM
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Several years ago, I used 245's more than once. The speedo may be off a little, but no problems at all. Look around, sometimes you can get 245's for as low as $50 each.
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Old Jan 2, 2010 | 11:43 PM
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^^Someone with practical experience....thanks.
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