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post #1 of 6 (permalink) Old 03-22-2004, 02:52 PM Thread Starter
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205 or 215?

The sticker on the passenger-side door frame lists the stock tire size for 15 inch wheels as either 205/70R15 or 215/70R15. Does anyone know why?

1997 Thunderbird LX 4.6L SOHC
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post #2 of 6 (permalink) Old 03-22-2004, 05:04 PM
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the 205's were std. equip. the bigger 215's came with some extra cost option packages.
here is a pic of my window sticker. it lists both 205 & 215 sizes, with the 215 being the "upgrade"
cougar sticker

i think that is the reason.

frank

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post #3 of 6 (permalink) Old 03-23-2004, 07:42 AM Thread Starter
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D'oh! I didn't even think to check the sticker. Thanks!

1997 Thunderbird LX 4.6L SOHC
PI cams and intake
J-mod, including OD and reverse servos
JL Rear STB
Front STB
Aluminum driveshaft
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post #4 of 6 (permalink) Old 03-23-2004, 11:01 AM
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the base models got 205/70-15s, LXs got 215/70-15 and SCs got 225/60-16.




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post #5 of 6 (permalink) Old 03-23-2004, 12:13 PM Thread Starter
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I need new tires, but since I'm going to at least do that I'm thinking about getting 17 x 8 Cobra wheels from Dan Newman. The hold up for me is deciding whether it's a good idea in terms of throwing the speedometer/odometer off a little. I've checked the tire calculator and all options are off somewhat. Pretty much I've narrowed it down to two possibilities: BFG g-Force KDWS in 255/50-17 or Continental ContiPremierContacts in 235/55-17. The BFG has a 27" diameter and is .7% too slow opposed the Continentals at 27.2" and 1.2% too slow. Does that much of a difference really matter? Also, my logic at this point is to buy a tire that is a little bigger than the stock 26.9 because the tire will get closer to that size at it wears. Does that sound reasonable?

And if anyone has pictures of their Tbird or Cougar with tires these sizes on it, please let me know. I'd like to see how they look.

Thanks!

1997 Thunderbird LX 4.6L SOHC
PI cams and intake
J-mod, including OD and reverse servos
JL Rear STB
Front STB
Aluminum driveshaft
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post #6 of 6 (permalink) Old 03-24-2004, 12:56 PM
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think about it this way, when your speedo says 100mph you are actually traveling 100.7mph. it'll be off by even less than that at lower speeds. i doubt you'll notice.


i've got pics of my car with 255/45/17 Kuhmo's on 17x9 Cobra R's. let me know if you want them.

Matt
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moved on to a lighter chassis with a 5 speed and cheaper parts. i know, i sold out.
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