Here's another one for y'all. Who has the lightest car wheels? Also, what size?

"d15b" (d15b7)
04/06/2016 at 19:58 • Filed to: Rotational mass is a mofo.

The great wheel weight debate. How important is rotational mass?

14 x 5.5 Inches, 11 Pounds. How about you?

DISCUSSION (51)

Aaron M - MasoFiST > d15b
04/06/2016 at 20:02

Not lighter than that, but still relatively impressive...

15.4 lbs, 17x8.

1111111111111111111111 > d15b
04/06/2016 at 20:02

Keith Bontrager said Light, Stong, Cheap. Pick Two. I know how important it is on a 20 poubd bike. But what’s 5-10 pounds on a 2000 pound car?

d15b > 1111111111111111111111
04/06/2016 at 20:03

It makes a difference! Rotational mass is a mofo.

d15b > Aaron M - MasoFiST
04/06/2016 at 20:04

That is still pretty damn light...less than 16 lbs.

d15b > 1111111111111111111111
04/06/2016 at 20:05

That said, cheap and strong if you’re racing.

Logansteno: Bought a VW? > d15b
04/06/2016 at 20:06

M-Contours are 17x7.5in and weigh 22.3lbs in front and 17x8.5in and weigh 23.4lbs in the back.

Wow, those are heavier than I expected.

Aaron M - MasoFiST > d15b
04/06/2016 at 20:07

Yeah, though I’ve read multiple specs for the wheel weight, but it’s between 15.5 and 16.5. A fair upgrade from the stock wheels which were 23lbs each, and the new ones are an inch wider too.

MM54 > d15b
04/06/2016 at 20:08

I have 16x7 stamped/welded steel wheels, each one weighs approximately a whole lot. With tire (225/65) they weight approximately a bunch.

d15b > Aaron M - MasoFiST
04/06/2016 at 20:08

Kinja'd!!!

Pontiac said it best.

Aaron M - MasoFiST > d15b
04/06/2016 at 20:09

Truer words...especially appropriate for one of the only brands to ever release a reverse-staggered car (wider fronts than rears).

d15b > MM54
04/06/2016 at 20:10

How many 1 arm bicep curls can you do holding a wheel? Wheel and tire?

d15b > Aaron M - MasoFiST
04/06/2016 at 20:10

THAT, I did not know. I was just referencing an old slogan.

. . > d15b
04/06/2016 at 20:12

4.0x12 steelies. 10.8 lbs a corner.

d15b > . .
04/06/2016 at 20:13

Twelve inch wheels. Damn, son.

Aaron M - MasoFiST > 1111111111111111111111
04/06/2016 at 20:14

On average it’s stated that unsprung mass has 4x the impact of sprung mass when considering weight reduction. So a purchase like mine, going from 23lbs to 16 or so on all four corners, is 24lbs of real weight reduction and equal in impact to 100lbs anywhere else on the car.

. . > d15b
04/06/2016 at 20:14

135/80 R12 tyres represent!

BJ > d15b
04/06/2016 at 20:14

Rotational mass matters: http://www.caranddriver.com/features/effec…

I can’t find it now, but another magazine did a track test with 3 different sizes on a BMW as well - same result.

My truck wheels probably weigh a lot. 17x7.5 with big tires, I know they’re heavy when I have to move them around...

Little Black Coupe Turned Silver > d15b
04/06/2016 at 20:15

The track wheels are 18x8 and around 18 lbs. Enkei doesn’t like saying how much and I can’t be bothered to weigh them.

The street wheels are also an 18x8 Enkei but are something silly like 26 lbs. Without tires.

It’s much easier to lift and put the track wheels on, I can say that much.

Jarrett - [BRZ Boi] > d15b
04/06/2016 at 20:17

17x7, 20.5 lbs

Looking for recommendations for my NB that won’t kill my bank account (and have to be available in Ontario!)

d15b > Little Black Coupe Turned Silver
04/06/2016 at 20:17

Bicep curls! How many?

d15b > BJ
04/06/2016 at 20:18

PHYSICS!

BJ is my nickname. Stands for, Bill(ly) James, ha.

1111111111111111111111 > Aaron M - MasoFiST
04/06/2016 at 20:19

That would make a noticeable difference possible.

That gets me thinking of the flywheel hybrid systems. What if the flywheel, or wheels were articulated to act like traction and stability control?

Aaron M - MasoFiST > d15b
04/06/2016 at 20:20

Grand Prix GXP: 18x8 in the front, 18x7 in the back.

BJ > d15b
04/06/2016 at 20:20

Hey, BJ is my nickname, too! ;-) Ha ha!

I dug up an old post of mine about EMM-PEE-GEES and wheels, it has the link I mentioned: http://oppositelock.kinja.com/lightweight-wh…

PorkchoPlissken > d15b
04/06/2016 at 20:20

Not me. Ok with it.

Kinja'd!!!

Supreme Chancellor and Glorious Leader SaveTheIntegras > d15b
04/06/2016 at 20:22

17x7

23lbs

d15b > PorkchoPlissken
04/06/2016 at 20:27

As the engineers intended it so.

d15b > Supreme Chancellor and Glorious Leader SaveTheIntegras
04/06/2016 at 20:28

Sounds OEM?

d15b > BJ
04/06/2016 at 20:31

You can definitely tell when you swap wheels out with a lighter set, for sure!

4muddyfeet - bare knuckle with an EZ30 > d15b
04/06/2016 at 20:31

Er, I’m the other way inclined - 16x7, 35lb

Supreme Chancellor and Glorious Leader SaveTheIntegras > d15b
04/06/2016 at 20:31

Yep. For now rocking the stock Si wheels

PorkchoPlissken > d15b
04/06/2016 at 20:32

Agreed. I’m not tracking it, so I dont benefit. Also, everything else is stock, so why would I change the wheels? And those terrible wheels in the background is not my car. But other than the nasty chrome wheels, it is a very cool build. I’m all for ad grammar and stock wheels.

d15b > PorkchoPlissken
04/06/2016 at 20:34

That build would look good with some 80's “turbo fin” wheels.

d15b > 4muddyfeet - bare knuckle with an EZ30
04/06/2016 at 20:35

I’m sure those wheels are strong?

d15b > Supreme Chancellor and Glorious Leader SaveTheIntegras
04/06/2016 at 20:37

KEEP ALL YOUR STOCK PARTS. #wisdom

4muddyfeet - bare knuckle with an EZ30 > d15b
04/06/2016 at 20:37

4850lbs per wheel, apparently.

d15b > 4muddyfeet - bare knuckle with an EZ30
04/06/2016 at 20:40

Well, I guess rotational mass isn’t your performance metric, haha.

Supreme Chancellor and Glorious Leader SaveTheIntegras > d15b
04/06/2016 at 20:42

They’ll (the stock ones) be the fall/winter wheels if anything