|
Why 13 inch Wheels?
Why do I see most guys going with 13 inch rears instead of 12 inch. The 335 tire most are using specs out at 12.5 inches anyways
:cheers: DH |
When comparing a single tire size against two different wheel widths, it's better to go with the wider wheel (assuming it's within reason) as that will end up putting more of the tire on the ground. Additionally, there is better sidewall support which reduces deflection and improves not only grip, but feedback and driver confidence. In this particular case, running a 335 on a 13" wheel provides more performance than a 12" wheel would. A good rule of thumb is to have the tread width and wheel width the same value, or the wheel width slightly greater than the tread width.
- Cory |
Originally Posted by APEXRaceParts
(Post 1599279150)
When comparing a single tire size against two different wheel widths, it's better to go with the wider wheel (assuming it's within reason) as that will end up putting more of the tire on the ground. Additionally, there is better sidewall support which reduces deflection and improves not only grip, but feedback and driver confidence. In this particular case, running a 335 on a 13" wheel provides more performance than a 12" wheel would. A good rule of thumb is to have the tread width and wheel width the same value, or the wheel width slightly greater than the tread width.
- Cory :cheers: DH |
Originally Posted by APEXRaceParts
(Post 1599279150)
When comparing a single tire size against two different wheel widths, it's better to go with the wider wheel (assuming it's within reason) as that will end up putting more of the tire on the ground. Additionally, there is better sidewall support which reduces deflection and improves not only grip, but feedback and driver confidence. In this particular case, running a 335 on a 13" wheel provides more performance than a 12" wheel would. A good rule of thumb is to have the tread width and wheel width the same value, or the wheel width slightly greater than the tread width.
- Cory |
Few people having issues with fitting 13" on C7 wide body. I'd go 12.5" when I am ready.
|
Originally Posted by GoatHead
(Post 1599282425)
Few people having issues with fitting 13" on C7 wide body. I'd go 12.5" when I am ready.
:cheers: DH |
I have used several sets of 18x13 wheels on a c7 gs with no issues.
|
Originally Posted by c5racr1
(Post 1599286697)
I have used several sets of 18x13 wheels on a c7 gs with no issues.
|
Originally Posted by Dirty Howie
(Post 1599279035)
Why do I see most guys going with 13 inch rears instead of 12 inch. The 335 tire most are using specs out at 12.5 inches anyways
:cheers: DH Bill |
Originally Posted by Bill Dearborn
(Post 1599295248)
It has to do with contact patch shape. There is only so much area of a tire touching the ground. Say your tire has to support 1500 lbs and you are running a tire pressure of 30 psi. That means the tire is putting 50 square inches on the ground (50x30=1500). Since the contact patch is equal to width x length the wider you make the 50 square inches the shorter the patch. The shorter the patch the faster the tire reacts to changes in direction.
Bill Thanks for the science lesson and I get it:thumbs: Just wondering why the manufacturer wouldn't include this size wheel in their specs ??? :cheers: DH |
Wider contact patch = less grip to accelerate forward.
|
Originally Posted by Apocolipse
(Post 1599301535)
Wider contact patch = less grip to accelerate forward.
:cheers: DH |
Same reason wider gives you more lateral grip. Wider side to side means narrower front to back.
|
Originally Posted by Apocolipse
(Post 1599301704)
Same reason wider gives you more lateral grip. Wider side to side means narrower front to back.
:cheers: DH |
Originally Posted by Apocolipse
(Post 1599301704)
Same reason wider gives you more lateral grip. Wider side to side means narrower front to back.
That said, I'm not sure it's a given that a 13" wheel with the 335 actually puts more tread width on the ground. Or at least I'm not sure it does so without reducing the pressure in the center of the contact patch. It seems to me that a useful way to approach is by dividing the millimeters of section width by the wheel width. The common 315 fitment is to use them on 11" wheels. That gives 28.64mm of section width per inch of wheel. A 335 tire on a 12" wheel only has 27.92mm of section width per inch of wheel width - it's already more stretched than the 315mm/11" fitment! That makes sense when we realize that the 335 is less than an inch wider than the 315 in section width, and it's only 0.4" wider in tread width. On a 13" wheel, it would be down to only 25.77mm per inch of wheel width - a lot more stretched than the 315/11 fitment. That is outside BFG's recommended wheel widths for the 335, and for obvious reasons. |
Originally Posted by MatthewMiller
(Post 1599315964)
Except you would just run less tire pressure if the wider wheel were really widening the useful contact patch. By running lower air pressure, you'd have a wider contact patch with the same length compared to the narrower wheel. This is what people always fail to take into account with any wider wheel/tire combo.
That said, I'm not sure it's a given that a 13" wheel with the 335 actually puts more tread width on the ground. Or at least I'm not sure it does so without reducing the pressure in the center of the contact patch. It seems to me that a useful way to approach is by dividing the millimeters of section width by the wheel width. The common 315 fitment is to use them on 11" wheels. That gives 28.64mm of section width per inch of wheel. A 335 tire on a 12" wheel only has 27.92mm of section width per inch of wheel width - it's already more stretched than the 315mm/11" fitment! That makes sense when we realize that the 335 is less than an inch wider than the 315 in section width, and it's only 0.4" wider in tread width. On a 13" wheel, it would be down to only 25.77mm per inch of wheel width - a lot more stretched than the 315/11 fitment. That is outside BFG's recommended wheel widths for the 335, and for obvious reasons. :cheers: DH |
Simply put a "very sticky" IE hot slick or super 200 tire will feel better on track with the wider wheel.
A 13" wheel will have less sidewall deflection than a 12". Sharper feel will make you faster. People have been mounting 18x13's with no problem since a week after the C7Z came out. Note this is for track use where you are at the limit. For the street a 12" actually is more pleasant to drive. |
Originally Posted by blkbrd69
(Post 1599367903)
Simply put a "very sticky" IE hot slick or super 200 tire will feel better on track with the wider wheel.
A 13" wheel will have less sidewall deflection than a 12". Sharper feel will make you faster. People have been mounting 18x13's with no problem since a week after the C7Z came out. Note this is for track use where you are at the limit. For the street a 12" actually is more pleasant to drive. :cheers: DH |
You guy's running 13 inch lowrider wire wheels??
|
18x13s because 345/35/18 hoosiers out back.
|
| All times are GMT -4. The time now is 05:24 PM. |
© 2024 MH Sub I, LLC dba Internet Brands