GT350R carbon fiber wheels performance data

[Myshelby3425]

I agree that the comparison above does not correlate true scientifically reliable data, but physics is physics... Even if they sport cupped both wheels the R wheel would still outperform the aluminum wheel by the sheer physics of weight reduction period.

Yes of course, no one is arguing that. The numbers would differ greatly to those posted in the article.


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[Chetly]

So what your saying is diameter has nothing to do with acceleration. That's like saying a car with 4.10's with lighter weight wheels will accelerate as fast as a car with 4.56's with heavy wheels.

 

[DrumReaper]

And the performance advantage is more from the tire compound and height more than it is the weight. A short, grippy light weight tire will out accelerate/decelerate a taller, less grippy heavy tire. To get the performance advantage of the carbon wheels and the carbon wheels alone tires would have to be same tire, same height.

On the contrary... This poster argued more. He says the gains in shorter tire height and compound are greater than the weight difference which is simply a false argument IMHO.

I do agree tho that a true comparison would eliminate as many variables as possible.

 

[DrumReaper]

So what your saying is diameter has nothing to do with acceleration. That's like saying a car with 4.10's with lighter weight wheels will accelerate as fast as a car with 4.56's with heavy wheels.

No. It appears everyone here agrees the shorter tire height will yield faster acceleration... But does the lighter weight of the R wheel contribute to faster times than the smallish ~1" diameter differences is the question.

 

[Voodooo]

Here's my question.
I just ordered a set of GA1R open lug 11x19 wheels and Michelin pilot sport cup 2 305/30ZR19 tires. Forgeline told me the wheels weigh 20.5 pounds and the tires are 26 pounds each. 46.5 pounds each. That's equal to the R's Carbon wheels. And cheaper and I'm not a R clone. Maybe I should of went the 315/30ZR19 rear on the 11x19 rear wheels? It's not to late to change yet. 4 more weeks until I get my wheels on. The 315/30ZR19's are 28 pounds each.

 

[krt22]

Really up to you. If you got a square set of wheels and are running a spacer, you obviously give up the ability to rotate the wheels, unless you want to go 315 all around

 

[Voodooo]

Really up to you. If you got a square set of wheels and are running a spacer, you obviously give up the ability to rotate the wheels, unless you want to go 315 all around

No spacers. Wheels do not have the same backspace. But the 315 can fit a 10.5-11.5 wheel width.

 

[krt22]

If not intending to rotate and run square, then might as well go with the same exact 305/315 setup that the R has

 

[Voodooo]

If not intending to rotate and run square, then might as well go with the same exact 305/315 setup that the R has

My thoughts exactly.

 

[Trackaholic]

How about tire availability? Looking at tire rack, there isn't much in the 305/35-19 size. The only one that shows up is the Michelin PSS.

The 315/30-19 only has the PSC2's.

The 305/30-19 however has many options. Seems like that might be a solid choice initially, at least for tire choice flexibility.

Also, great wheel choice. I plan to get a set of those wheels at some point.

Regarding the original article, IMO there are too many variables to draw a meaningful conclusion regarding performance. Clearly the lighter wheels will make a difference in performance. Clearly the gearing difference due to the tire diameter will also make a difference. Best way to know which is more significant would be to use the same size tires for the test. The "roll down" test also has differences due to aero drag and rolling resistance. Hard to know what kind of difference that made as well.

It is interesting that these seemingly small factors can have an appreciable difference in performance numbers, so I like the test from that perspective. Just wish it was a bit better controlled.

-T

 

[Voodooo]

How about tire availability? Looking at tire rack, there isn't much in the 305/35-19 size. The only one that shows up is the Michelin PSS.

The 315/30-19 only has the PSC2's.

The 305/30-19 however has many options. Seems like that might be a solid choice initially, at least for tire choice flexibility.

Also, great wheel choice. I plan to get a set of those wheels at some point.

-T

When I placed the order with Forgeline on the GA1R open lugs they are mounting the 305/30ZR19's for me. But I'm thinking I should go the 315/30ZR19 for the rear

 

[908ssp]

When I placed the order with Forgeline on the GA1R open lugs they are mounting the 305/30ZR19's for me. But I'm thinking I should go the 315/30ZR19 for the rear

I would.

 

[Voodooo]

I'm trying to find the GT350R wheel back spacing front and rear.

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