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Are these the only two 16" performance tires with a 27" overall diameter?

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Are these the only two 16" performance tires with a 27" overall diameter?

Old 04-22-2018, 12:41 PM
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Kie
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Default Are these the only two 16" performance tires with a 27" overall diameter?

Lets say you were deranged enough to purposely install 36 year-old 16x8.5 performance wheels on your C3. Assume for the moment that whatever sickness you are afflicted with is untreatable/incurable and your only hope for happiness is to install new performance tires on these relics from the past. The tires must look as correct as possible and most importantly fill out the wheel wells just like the oem 15" rallys do with a 225/70.

Is your only choice the 235/60 16 Bridgestone RE040 or the 235/60 16 Sumitomo HTR ZII ?
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Old 04-22-2018, 12:50 PM
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I like the looks of the sumitomo tread pattern. never heard of this brand
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Old 04-22-2018, 12:57 PM
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Originally Posted by gmcman52 View Post
I like the looks of the sumitomo tread pattern. never heard of this brand

I've had them on a few cars. $380 smax delivered from Tire Rack for a set lol. The 'stones are $1080. This is my 987 3.4 Boxster with literally everything and I'm running the sumis. They work great.
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Old 04-22-2018, 03:05 PM
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If you're willing to put autoX tires on your car, Toyo sells a P255/50ZR-16 TOYO PROXES RA1 tire that is DOT street legal. 26-1/4 diameter fills the wheel well nicely.


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Old 04-23-2018, 11:59 AM
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Originally Posted by ignatz View Post
If you're willing to put autoX tires on your car, Toyo sells a P255/50ZR-16 TOYO PROXES RA1 tire that is DOT street legal. 26-1/4 diameter fills the wheel well nicely.
Thank you. I was aware of this tire and I’d have no problem running that on the street. Goodrich also makes a G-Force Soort Comp in this size.

Can you post a profile picture please? The one shot you did post looks awesome. I was afraid the 26.1” diameter wouldn’t fill out the wheel wells like I want.

Are you running that size front and rear ?
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Old 04-23-2018, 12:05 PM
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Same tire front and rear. Here you go Kie!
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Old 04-23-2018, 12:16 PM
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Originally Posted by ignatz View Post
Same tire front and rear. Here you go Kie!
Dang it now you’re making this a hard decision. That looks great. I’m guessing the speedo discrepancy is minimal.

Do you know what rim sizes and offsets you’re running?
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Old 04-23-2018, 12:21 PM
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If memory serves (and I bought these wheels in the 90's so that's kind of a challenge), they are 8.5" w/ 4-1/4" offset. Super light weight. I wouldn't go any wider. Maybe I have a receipt somewhere, I'll have a look.
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Old 04-23-2018, 12:38 PM
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Originally Posted by ignatz View Post
If memory serves (and I bought these wheels in the 90's so that's kind of a challenge), they are 8.5" w/ 4-1/4" offset. Super light weight. I wouldn't go any wider. Maybe I have a receipt somewhere, I'll have a look.
The wheels I bought were made in 1982 and have been in storage since 1984. Same exact sizes/dimensions as yours. This info is very helpful thanks !
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Old 04-23-2018, 10:48 PM
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oops---duplicate...

Last edited by carriljc; 04-23-2018 at 10:55 PM.
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Old 04-23-2018, 10:54 PM
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Here is a website where you can play around with different size tires:

https://tiresize.com/comparison/

FYI - on my 68 front tires I went to 235/60R15s because the 245/60r15s rubbed... just barely but annoyingly enough. I you enter those two sizes (for example) you can see the subtle differences in size, height, circumference, etc....
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Old 04-23-2018, 11:53 PM
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Originally Posted by carriljc View Post
Here is a website where you can play around with different size tires:

https://tiresize.com/comparison/

FYI - on my 68 front tires I went to 235/60R15s because the 245/60r15s rubbed... just barely but annoyingly enough. I you enter those two sizes (for example) you can see the subtle differences in size, height, circumference, etc....
My understanding is that 68's had 7" rims. Is that correct? It would make a difference depending on the geometry of those wheels. I never had problems with my 69's original rims and 245's.
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Old 04-23-2018, 11:58 PM
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Well, when I bought mine (33+ years ago) it came with 8" rallye wheels (rims) and that is what is on there now.
And, YES, I should have mentioned that.


Originally Posted by ignatz View Post
My understanding is that 68's had 7" rims. Is that correct? It would make a difference depending on the geometry of those wheels. I never had problems with my 69's original rims and 245's.

Last edited by carriljc; 04-23-2018 at 11:59 PM.
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Old 04-24-2018, 12:58 AM
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FYI-- '68 cars had 7" rims; later cars had 8" rims. But the wheelwell space in all early C3's (prior to '75) was the same.
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Old 04-24-2018, 01:22 AM
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Originally Posted by 7T1vette View Post
FYI-- '68 cars had 7" rims; later cars had 8" rims. But the wheelwell space in all early C3's (prior to '75) was the same.
My car is a 75 coupe. Pro date 1/75. How is the wheel well space different compared to an early C3 ?
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Old 04-24-2018, 03:54 AM
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Fronts are 16x8 with Michelin 225/55xr16, rears are 16x10 with BFG 255/50xr16. This wheel tire combo actually belongs on the blue car.

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