Speedometer readings?

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Oct 8, 2007 | 07:15 PM

#21

Sloan

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Joined: May 2007

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From: Alabama

http://www.miata.net/garage/tirecalc.html

Oct 8, 2007 | 07:57 PM

#22

LJ_24

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Quote:

Originally Posted by unitofstuff

From 265/70/16's to 265/75/16's is a 3.4% speed difference. When the speedometer says 60mph, you're going 62. Also consider that if you're going to more aggressive tires from street/bald tires, you'll probably gain a little more height than just the sizes say.

--can anyone confirm this

--btw, that is the most detailed explanation i ever got on yotatech!

Oct 8, 2007 | 08:40 PM

#23

Texas_Ace

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Joined: Apr 2007

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From: DFW TEXAS BABY!

Quote:

Originally Posted by LJ_24

--can anyone confirm this

--btw, that is the most detailed explanation i ever got on yotatech!

Yes, i can confirm that. It was a nice explanation, i should have remembered that site. A more aggressive trie can have larger tread and thus a slightly larger overall size which can mean an extra little bit on the speedo.

Oct 9, 2007 | 03:27 AM

#24

xsvtoyz

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From: Tulsa Ok

if you went from 265/70/16 to 265/75/16 for every 100 miles on the odometer you actually have travelled 102-104 miles so your speedometer is off by maybe 1-2 mph not enough to even consider a recalibration save your money
so if you are traveling at 70 speedometer wise your are actually traveling at 71 or 72 I did the same tire size change and they had a radar display on my way to work I went by it for months before and after the change and it was so close on every pass I finally quit worrying about it