Outer tire diameter question
Thread Starter
Burning Brakes
Joined: Jan 2001
Posts: 847
Likes: 9
From: Beaumont Tx
Outer tire diameter question
I have another thread asking about going wider in rear and got some great responses! I've decided, for now, to go with 305/30/19. My question is since I'm going smaller sidewall ratio, I'm assuming that the overall diameter will be smaller? Right? If so I'm wondering how that would look.since fronts are 18. Suggestions? Or pics?
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 35,106
Likes: 12,446
From: NE South Carolina
I have another thread asking about going wider in rear and got some great responses! I've decided, for now, to go with 305/30/19. My question is since I'm going smaller sidewall ratio, I'm assuming that the overall diameter will be smaller? Right? If so I'm wondering how that would look.since fronts are 18. Suggestions? Or pics?
Aspect ratio and diamter give a good indication but tires are different. Look up the tire your thinking about using.
Former Vendor
Joined: Aug 2014
Posts: 442
Likes: 7
From: Miami FL
I have another thread asking about going wider in rear and got some great responses! I've decided, for now, to go with 305/30/19. My question is since I'm going smaller sidewall ratio, I'm assuming that the overall diameter will be smaller? Right? If so I'm wondering how that would look.since fronts are 18. Suggestions? Or pics?
Vs. the ones you are running now, 305-30-19 = 26.2 o/d
Which is a difference of .6 in basically a half inch difference.
I hope this helps...
Thread Starter
Burning Brakes
Joined: Jan 2001
Posts: 847
Likes: 9
From: Beaumont Tx
Thread Starter
Burning Brakes
Joined: Jan 2001
Posts: 847
Likes: 9
From: Beaumont Tx
Actually I'm not running on them yet. I'm trying to figure out whether I go to 30 or 35. Because I don't want it to look bad from the side view from the front with sidewall compared to the rear with sidewall. However I don't think a half inch is going to make that big of a difference that you could notice. As always thanks guys
Burning Brakes
Joined: Oct 2010
Posts: 833
Likes: 240
Actually I'm not running on them yet. I'm trying to figure out whether I go to 30 or 35. Because I don't want it to look bad from the side view from the front with sidewall compared to the rear with sidewall. However I don't think a half inch is going to make that big of a difference that you could notice. As always thanks guys
I did it with my C6 and the fatter tire looked good. My C7 only has 2000 miles on it so i have awhile.
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Tech Contributor
Joined: May 2003
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From: North Augusta, SC
In C5 and C6 the computer would get quite upset if the rear tire diameter was smaller than the fronts, they need to be larger in the back. Even sizes were OK from what I remember, but smaller was definitely not an option. C7 is probably the same way, just so you're aware.
Instructor
Joined: Jul 2012
Posts: 122
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From: corpus christi texas
I have another thread asking about going wider in rear and got some great responses! I've decided, for now, to go with 305/30/19. My question is since I'm going smaller sidewall ratio, I'm assuming that the overall diameter will be smaller? Right? If so I'm wondering how that would look.since fronts are 18. Suggestions? Or pics?
Last edited by shakeydog; Mar 18, 2016 at 02:54 AM.
Thread Starter
Burning Brakes
Joined: Jan 2001
Posts: 847
Likes: 9
From: Beaumont Tx
In C5 and C6 the computer would get quite upset if the rear tire diameter was smaller than the fronts, they need to be larger in the back. Even sizes were OK from what I remember, but smaller was definitely not an option. C7 is probably the same way, just so you're aware.
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 35,106
Likes: 12,446
From: NE South Carolina
The difference Zymugy showed is relatively small if you look at different brands, all season tires etc of the same size spec you can see that much difference! Also consider warn rears with new fronts, etc!
Last edited by JerryU; Mar 18, 2016 at 03:46 PM.
Thread Starter
Burning Brakes
Joined: Jan 2001
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From: Beaumont Tx
Dang, you guys just get smarter and smarter. Because I indeed have bald tires and brand new front tires!
Dazed Confused & Verklemp
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From: Naples, FL & Clear Lake, IA
That's why I always check TireRack before I buy, even if I don't buy from them.
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Thread Starter
Burning Brakes
Joined: Jan 2001
Posts: 847
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From: Beaumont Tx
I’m looking at the Nitto nt 555g2 305/35/19. I know the calculation, but is there a way to find out the exact sidewall height for this tire, since sizes vary from tire to tire? Also I want to know the exact sidewall height of the stock super sports that came on car? If one of you could just take a tape to your rear wheel to find this out even.
Thanks
John
Thanks
John