 Tires stores piss me off. |
 Aug 24, 2010 - 11:36 AM
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 Enthusiast  Joined May 10, '10 From MA Currently Offline Reputation: 37 (100%)  |
So I'm in need of getting new tires for my stock rims because they are getting kind of bald on the inside. I've gone to a few places already and they don't have the exact 205/55/R15 tires there, but they do have 205/60/R15's. They keep telling me it'll throw my speedometer off by a few miles an hour and that my braking distance will be semi reduced. I just want to know if that is true or if it's just B.S.
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Aug 24, 2010 - 10:49 PM
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 Enthusiast Joined Feb 5, '05 From pineapple under the sea Currently Offline Reputation: 9 (100%) |
Yeah it throws your speedometer off, because it's calibrated to a specific rotational size. When you start getting bigger wheels/tires the circumference changes and it throws off the speedometer.
And the math is like this - with "old" being 205/55 and "new" being 205/60 Speed Comparison: Old front tire revolutions per kilometer: 525. New front tire revolutions per kilometer: 508. New front tire is at 103KPH (64MPH) when spinning at the old tire's 100KPH (62MPH) RPM. Old rear tire revolutions per kilometer: 525. New rear tire revolutions per kilometer: 508. New rear tire is at 103KPH (64MPH) when spinning at the old tire's 100KPH (62MPH) RPM. -------------------- 1991 MR2 - T-tops - Crimson Red - Gen3 3SGTE - Lots of money
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Posts in this topic
mkernz22 Tires stores piss me off. Aug 24, 2010 - 11:36 AM
JuMPiiN Idk i was told that too, i went from the stock 15s... Aug 24, 2010 - 11:38 AM mkernz22 just found one place that has some Dunlop Direzza... Aug 24, 2010 - 12:08 PM richee3 They most likely aren't lying to you. The Celi... Aug 24, 2010 - 12:11 PM mak5603 I have 17's and when i pass those "you ar... Aug 24, 2010 - 12:17 PM mkernz22 Well I also have 18 inch rims from my parts car th... Aug 24, 2010 - 12:32 PM mak5603 yeah, thats lame they straight up wouldn't do ... Aug 24, 2010 - 12:39 PM jordisonjr A 60 serious side wall is fine instead of 55. I us... Aug 24, 2010 - 7:28 PM SupraKid tirerack.com
/thread Aug 25, 2010 - 1:31 AM mkernz22 i actually got some Dunlop Direzza tires from a Go... Aug 27, 2010 - 11:34 PM windowlicker this will show you the difference in what the size... Aug 30, 2010 - 3:00 AM
mkernz22 so since i have 18 in rims from the parts car I wo... Aug 30, 2010 - 8:57 AM |
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