06-12-2013, 07:34 PM | #1 |
Drives: Cyber Gray 2011 2LT Camaro Join Date: Aug 2010
Location: Kern County, CA
Posts: 168
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Trying to Understand Tire Sizes
So I’m hoping to put some good track tires on my stock 19” rims, but since no one sells anything good in the stock 245/50 size I’m trying to figure out what sizes will fit.
So the stock rims are 19x8. Width in millimeters is 203.2 which is much smaller than 245 (9.64567 inches). Height in millimeters is 482.6. Height of stock tires = 482.6 + (245*0.5) + (245*0.5) = 727.6 (28.645669 inches) correct? So why is the width of the tire so much wider than the width of the wheel? How big/small of a tire could you safely put on an 8” wheel? Assuming I didn’t care about keeping the same tire height could I put any tire with a width between 205 and 245+? I’ve found some Nitto NT05s in size: 245/40R19 98Z, would these fit and be safe to use on the 19x8 rims? What other sizes can I use? |
06-12-2013, 08:27 PM | #2 |
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Check out this thread about tire size. Should help answer some of your questions.
http://www.camaro5.com/forums/showthread.php?t=62838
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06-12-2013, 08:54 PM | #3 | |
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Quote:
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06-12-2013, 08:58 PM | #4 |
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06-13-2013, 12:24 PM | #5 | ||
Drives: Cyber Gray 2011 2LT Camaro Join Date: Aug 2010
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Quote:
So unless there is more to it in the later pages that I missed it doesn't really answer my questions. Quote:
This article is good at explaining what the numbers mean but other than wheel diameter it doesn't explain what tires go on what wheels. It doesn't explain why the tire width is so much higher than the wheel width which is my main concern/lack of understanding. |
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06-13-2013, 03:59 PM | #6 | |
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Quote:
http://www.tirerack.com/about/techcenter.jsp
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Dear Lord, give me the strength to carry on despite my Camaro addiction!
JRE iTSX tune, full cat-less Dynatech exhaust, CAI intake, Stillen Slotted/Drilled Rotors, RB braided brake lines, BMR lowering springs, (reserved for definite future MODS) |
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06-13-2013, 06:24 PM | #7 | |
Drives: Cyber Gray 2011 2LT Camaro Join Date: Aug 2010
Location: Kern County, CA
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Quote:
What is the relationship between wheel width and tire width? It clearly isn't 1 to 1. Will a 245/45R19 tire fit on a 19x8 wheel? Will a 245/40R19 tire fit on a 19x8 wheel? Will a 275/35R19 tire fit on a 19x8 wheel? Will a 225/40R19 tire fit on a 19x8 wheel? |
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06-13-2013, 08:36 PM | #8 |
Drives: Cyber Gray 2011 2LT Camaro Join Date: Aug 2010
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Would these RS3s fit? http://www.tirerack.com/tires/tires....2140&tab=Specs
Size: 245/40ZR19 Sidewall Style: Blackwall Serv. Desc: 94W UTQG: 140 A A |
06-13-2013, 09:20 PM | #9 |
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use tirerack.com
pull up the tire in question, and goto the "specs" tab. it lists the recommended wheel width |
06-13-2013, 09:26 PM | #10 |
Drives: 2013 2SS/RS/1LE Join Date: Apr 2010
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the same page you linked, there is a "rim width range" column
just note that at the small end of the range, the sidewall will bow out, and at the large end of the range, the tire will be stretched. so you will want to stay in the middle of the range |
06-14-2013, 12:37 PM | #11 | |
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Quote:
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Dear Lord, give me the strength to carry on despite my Camaro addiction!
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06-14-2013, 01:07 PM | #12 |
Drives: Cyber Gray 2011 2LT Camaro Join Date: Aug 2010
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Yeah that's what I did. What I don't get is why the stock tires are 9.6 inches and the stock wheels are 8 inches. Why is there a 1.6 inch difference? Is it recommended the tires be wider?
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06-14-2013, 01:25 PM | #13 |
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I really have no idea man. As a total guess, maybe when manufacturers measure wheels/rims they don't account for the lip? That's only a guess, I'm sure there are experts on our forums that could provide the correct answer.
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Dear Lord, give me the strength to carry on despite my Camaro addiction!
JRE iTSX tune, full cat-less Dynatech exhaust, CAI intake, Stillen Slotted/Drilled Rotors, RB braided brake lines, BMR lowering springs, (reserved for definite future MODS) |
06-14-2013, 02:44 PM | #14 |
Drives: Cyber Gray 2011 2LT Camaro Join Date: Aug 2010
Location: Kern County, CA
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Yeah, from what little I've gather I'm going to go with a tire with the same width unless someone tells me otherwise.
Hankook Ventus R-S3: http://www.tirerack.com/tires/tires....2140&tab=Specs Size: 245/40ZR19 Sidewall Style: Blackwall Serv. Desc: 94W UTQG: 140 A A |
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