Re: Why yes, I do use this forum for everything...
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Joined: May 2003
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shareholder in the making
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Hmm. I wonder how much 6 mm will change the speeds and odometer. I do tend to be somewhat precise about such things, and I have been known to use the odometer to tell when to get gas. Extensively. That does leave the question of how to tell this guy to get lost (or at least that his prices are crazy high...) OTOH, supporting local businesses is (almost) always a good thing.
I am the Doctor, and THIS... is my SPOON!
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Re: Why yes, I do use this forum for everything...
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Joined: Feb 2004
Posts: 845
aficionado
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aficionado
Joined: Feb 2004
Posts: 845 |
After 21+ years in the auto dealership parts business, (6 years of that, at a Honda dealership) my opinion is: do yourself a big favor, and put on the factory spec. tires.......trust me, you will open a "can of worms"...otherwise.
Last edited by LT61; 04/16/07 12:55 AM.
LIFE: "Choices, balance, and timing"
(Larryism)
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Re: Why yes, I do use this forum for everything...
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Joined: Oct 2006
Posts: 280
local
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local
Joined: Oct 2006
Posts: 280 |
One of the tire's will have a diameter that is 381mm (15 inches) + 114mm + 114mm = 609mm and the other tire will have a diameter that is 381mm (15 inches) + 120.25mm + 120.25mm = 621.5mm. The difference in diameters will be 12.5mm. Since circumference is Pi X diameter, the difference in circumference is 12.5 x 3.14 = 39.25mm. This will make a roughly 2% difference. So if you are going at 55 mph, your speedometer will show 56.1mph.
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Re: Why yes, I do use this forum for everything...
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Joined: Aug 2004
Posts: 6,379 Likes: 7
axiomite
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axiomite
Joined: Aug 2004
Posts: 6,379 Likes: 7 |
The 190/60s will have a diameter of 23.97" while the 185/60s will have a diameter of 24.47". The circumferences will both be pi*diameter but the ratio will be the same -- 23.97/24.45 or about 2% difference. I think this is within the variation you get from one brand to another for the same tire size so probably a non-issue, but having said that some dealers *are* funny about the impact of tire size changes on warranty claims. Not sure where you stand on warranty; car may be just old enough to be outside warranty anyways. Lower profile tires will also tend to handle a tiny bit better (because the sidewalls don't flex as much) and ride a bit rougher (because the sidewalls don't flex as much ). The tire guy is probably telling the truth that the circumference is close enough not to matter, but on a family car I would go for the 185/65s over 190/60s even so. EDIT -- this tire circumference discussion is funny to me, since I drive a vehicle (2003 Jeep TJ Rubicon) which was designed for one tire size then fitted with smaller tires just before launch on the advice of the legal folks, so speedometer and odometer are both off by about 4%.
Last edited by bridgman; 04/16/07 01:03 AM.
M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39 M5HP, M40ti, Sierra-1 LFR1100 active, ADA1500-4 and -8
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Re: Why yes, I do use this forum for everything...
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Joined: May 2002
Posts: 10,654
shareholder in the making
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shareholder in the making
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Ken, it looks like you got pretty good advice from the guy. The Kumho appears to have a pretty good performance/price ratio . I assume the Solus was the one he was referring to(except it's 195, not 190, of course). The wider tread and narrower sidewall tend to offset, but the 195/60 is about 24.2" in diameter and the 185/65 about 24.4". The difference in diameter isn't very significant and if at 60 on the speedo now you're actually doing 59(typical), you'd be doing about 58.5 on 195/60. Generally(other factors remaining equal)the wider tire will handle a bit better and ride a little stiffer. This is practically no change at all from OE; there's a lot more radical stuff done I see on the Miata forum. Get the 195/60 Kumho Solus.
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Enjoy the music, not the equipment.
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Re: Why yes, I do use this forum for everything...
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Joined: Aug 2004
Posts: 6,379 Likes: 7
axiomite
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axiomite
Joined: Aug 2004
Posts: 6,379 Likes: 7 |
I believe HR tires are rated for 130 MPH sustained.
The old Civics never used to go that fast.
M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39 M5HP, M40ti, Sierra-1 LFR1100 active, ADA1500-4 and -8
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Re: Why yes, I do use this forum for everything...
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Joined: May 2002
Posts: 10,654
shareholder in the making
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shareholder in the making
Joined: May 2002
Posts: 10,654 |
Yeah John, but my tires are rated 149 mph and I was only able to do 130. Just another example of manufacturers exaggerating, I suppose, but I'm considering a lawsuit against Michelin.
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Enjoy the music, not the equipment.
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Re: Why yes, I do use this forum for everything...
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Joined: May 2003
Posts: 18,044
shareholder in the making
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OP
shareholder in the making
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I've got Z rated (155+) tires on my Volvo 850 Turbo wagon. Can't say I've bested 100 more than once or twice... O' course, that thing rides like it's on rails. Scratch that... like it's running over rails over and over and over again...
I am the Doctor, and THIS... is my SPOON!
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Re: Why yes, I do use this forum for everything...
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Joined: Apr 2003
Posts: 16,441
shareholder in the making
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shareholder in the making
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There's your problem right there. You're suppose to travel parallel to the rails.
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Re: Why yes, I do use this forum for everything...
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Joined: Feb 2006
Posts: 6,471
axiomite
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axiomite
Joined: Feb 2006
Posts: 6,471 |
Another vote for Tire Rack, and a vote for National Tire and Battery (NTB). My local NTB will price-match anything on Tire Rack, so I do my research online and then get the tires from NTB. I feel a little dirty for not directly supporting Tire Rack, but if you buy tires from NTB then you get lifetime rotations for free. Plus they are always having other specials. As to tire size, I once got wider tires on my old Subaru and the upgrade in handling was impressive. Gas mileage suffered, though. Then when they wore out and I went back to the original size, it felt a little bit like I was on bicycle tires at first ...
Bears, beets, Battlestar Galactica.
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