Lightweight wheel difference!

[Sasuketr]

Has anyone done any dyno or track comparison between a GTPP wheel and lighter wheel? I would like to know dropping 40+ lbs rotational mass is worth it or not. Thanks guys!

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[derieuz]

If you got light weight wheels of the same specs and mounted the same tires, you'd feel a difference for sure in accelerating. What people usually end up doing is getting lighter wider wheels for heavier tires. You end up only saving a couple points but have 20mm or more width both front and rear, you gain a ton of grip

 

[ridenfish39]

I went with TSW Bathurst that are about 12lbs a wheel lighter, and just reused my stock tires. Yes, you can feel a difference in the way the car rides. I get really good highway gas mileage for a pp 373 geared car so I think the light wheels have something to do with that as well. Plus, they look 100x better and are much easier to clean.

 

[Kbreese]

Has anyone done any dyno or track comparison between a GTPP wheel and lighter wheel? I would like to know dropping 40+ lbs rotational mass is worth it or not. Thanks guys!

As someone who has switched between 35lb wheels and 21lb wheels, You can definitely feel a difference, and not just in acceleration, but handling, braking, everything. As soon as you get in the car and simply turn the wheel at a stop or low speed it's like wow what a difference.

But I'm with you. I'd like to see some actual before and after dyno #'s or better yet track times.

 

[Sasuketr]

I went with TSW Bathurst that are about 12lbs a wheel lighter, and just reused my stock tires. Yes, you can feel a difference in the way the car rides. I get really good highway gas mileage for a pp 373 geared car so I think the light wheels have something to do with that as well. Plus, they look 100x better and are much easier to clean.

Thats what i will be doing as well. TSW's look awesome and have really good reviews. I will swap the pzero's with super sports or conti dws ultra high all seasons though.

 

[TrackpackGT]

IF the TSW Max is a lot less than my PP wheels, I'd really like those. I love the look of my PP wheels and wow do these wheels look similar.

 

[Need4SpeedMotors]

Dropping rotational mass and unsprung weight has huge benefits, you can feel them in this case because the factory PP wheels are so heavy switching to a quality wheel, even increasing it to a 20" wheel allows for you to still loose weight. Gain better acceleration, handling and braking.

 

[mustang87]

I've ask this same question before but never got any concrete answer. Most of us go wider width, so even if we save a few lbs on the wheels, our tires get heavier. Of course tire selection makes a difference. On top of that the majority on this forum go for 20s. So we gained traction and may save a few lbs on the wheels, but going 20s with wider width, I highly doubt reduce our rotational mass and unsprung weight. Why does every forget about tire weight when speaking about rotational mass and unsprung weight. Going 20s and wider wheels and tires should have a massive increase in rotational mass, given everything else are the same, it's just physics. Can anyone provide some data to back up these vague claims??

 

[TrackpackGT]

Just did a search on 275/40/19's- Cooper RS3A 33lbs, Conti Extreme DWS 22.3, Pirelli Pzero 30, Pilot SS 29.3. 265/35/20's Pzero 26.7lbs, Pilot SS 24.9.

 

[LHousePhoto]

Motor Trend did a comparison of a GT350 and GT350R (lighter weight wheels on the R)

The GT350 put down 467 hp / 374 torque, the R 471 hp / 376 torque.

Source

 

[TrackpackGT]

Now that's an example of some expensive RWHP!!!! $12k for a set......

 

[mustang87]

Motor Trend did a comparison of a GT350 and GT350R (lighter weight wheels on the R)

The GT350 put down 467 hp / 374 torque, the R 471 hp / 376 torque.

Source

The GT350R is light not just because of the wheels. No backseat, no AC etc., list goes on. Of course lighter wheels attributed greatly to the gains considering same width and tires.

My point was for people asking that if you stay at 19s but going wider or going to 20s and going wider. Then the majority of responses are vague such as due to lighter wheels your reduce rotational mass, unsprung weight but gain traction, completely ignoring how much rotational mass might be increases due to wider width wheels and tires. It all sounds like a sale pitch to sale the wheels ignoring what the OP is really asking.

 

[Kbreese]

The GT350R is light not just because of the wheels. No backseat, no AC etc., list goes on. Of course lighter wheels attributed greatly to the gains considering same width and tires.

Rotational mass is the only thing that matters on the dyno.

 

[mustang87]

Rotational mass is the only thing that matters on the dyno.

Aha, yes of course dyno, you're right. but that wasn't my point. If wheels are same width and tires are the same, the only thing difference is lighter wheels, it's only logical that there are gains.

Going wider and bigger using lighter wheels is what I'm questioning.

 

[TrackpackGT]

The wheels are $12,000 though.......

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