Wheel weight is a big deal!!
12-17-2004, 09:11 AM
#41
Safety Car
Yep, rotating weight is a bigger deal than most think. Not only the weight difference but where the weight is in relation to the axis of rotation. I shake my head when I see vendors touting their plus 1 or plus 2 wheels for performance. When I wanted wider wheels and tires I went DOWN in wheel and tire diameters, 17's all around, and 26" diameter tires. Big wheels ( 18's, 19's and 20's) are for show, not go.
12-17-2004, 09:33 AM
#42
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Originally Posted by 6Speeder
Yep, rotating weight is a bigger deal than most think. Not only the weight difference but where the weight is in relation to the axis of rotation. I shake my head when I see vendors touting their plus 1 or plus 2 wheels for performance. When I wanted wider wheels and tires I went DOWN in wheel and tire diameters, 17's all around, and 26" diameter tires. Big wheels ( 18's, 19's and 20's) are for show, not go.
BIG wheels are for SHOW , not GO. 17" wheels rotate faster too. I went with 18s on all four corners as the tires I wanted to use were affordable in 18" but not in 17" sooo . . CCW Classic track rim 18x12 with GY R480 slick 26 1/2x 11 1/2 x18 = 40 lbs
CCW Classic street rim 18x11 1/2 with Mich PS 335-30x18 = 51 lbs
11 lbs per rear wheel difference. The front wheels were 10lbs difference. So total of 42 lbs less with lighter wheels and tires.
Last edited by AU N EGL; 12-17-2004 at 09:46 AM.
12-17-2004, 10:02 AM
#43
Race Director
Originally Posted by 6Speeder
Big wheels ( 18's, 19's and 20's) are for show, not go.
on the 18's, agree on the 19's and up.......As bought our vert came with 19's on the back...
If you have a big brake package you need 18's for clearance
And some of us need 345/35/18s on the back for wet/dry traction
12-17-2004, 10:52 AM
#44
Safety Car
Originally Posted by ALLTHROTTLE&NOBOTTLE
And some of us need 345/35/18s on the back for wet/dry traction
If you need linear traction, you'd be better served with a 17" rim with a D/R or racing compound. I chuckle when I hear people spending $$$ by going with a wider tire in the rear thinking it'll assist with linear traction, then go with a street tire.
Everything being equal, a 265/40/17 will grip better than a 345/30/18 in a straight line. The extra height in the 265 will assist grip much more than the extra width on the 345.
12-17-2004, 10:53 AM
#45
Drifting
I have been considering the consequences along these lines my self. I just pulled the trigger on a set of CCW Classic Streets (anodized-brushed) 18x11 and 18x10 with Michelin PS2s. Those are for street though, I won't be drag racing with them. Gonna get a CCW drag pack for that come tax time.
But here is what I really wanted to post, and hopefully some others will post along the same lines. These are weights that I personally have measured and double checked:
18x9.5 OEM 2000 Thin Spokes Forged (painted) wheels = 20lbs on the nose, both of them.
17x8.5 OEM 2000 Thin Spokes Forged (painted) wheels stamped 1AB = 17lbs both
17x8.5 OEM 2000 Thin Spoke Forged (painted) wheel stamped 1AA = 17.33lbs (only had one of these bought it when I curbed one of my originals, if I had known the weight was different I never would have bought)
The above weights are completely bare wheels, no TPS, no centercap.
I also have some dismounted tires, run-flats and non, will add those later. Other please feel free to post anything they have personally weighed.
Good info to have!
But here is what I really wanted to post, and hopefully some others will post along the same lines. These are weights that I personally have measured and double checked:
18x9.5 OEM 2000 Thin Spokes Forged (painted) wheels = 20lbs on the nose, both of them.
17x8.5 OEM 2000 Thin Spokes Forged (painted) wheels stamped 1AB = 17lbs both
17x8.5 OEM 2000 Thin Spoke Forged (painted) wheel stamped 1AA = 17.33lbs (only had one of these bought it when I curbed one of my originals, if I had known the weight was different I never would have bought)
The above weights are completely bare wheels, no TPS, no centercap.
I also have some dismounted tires, run-flats and non, will add those later. Other please feel free to post anything they have personally weighed.
Good info to have!
12-17-2004, 11:19 AM
#46
Safety Car
Originally Posted by Y2Kvert4me
Did you fill them with helium?
Stock Z06 wheels alone weigh 19/21lbs ea. You're telling us your 19x10 and 19x11 wheel,with tires, weigh 14 and 16lbs?
Even if the wheels alone weighed that little, that would be impressive enough. They do not weigh that with tires mounted, sorry, no f'n way.
Better check your scale.
Stock Z06 wheels alone weigh 19/21lbs ea. You're telling us your 19x10 and 19x11 wheel,with tires, weigh 14 and 16lbs?
Even if the wheels alone weighed that little, that would be impressive enough. They do not weigh that with tires mounted, sorry, no f'n way.
Better check your scale.
Normally I would shudder at the thought of disagreeing with ET but this doesnt sound like it could even possibly be right.
Unfortunately, I cant find any manufacturer specs from either CCW or Michelin to confirm their weights but there is no way that that your tires and wheels weigh 14 & 16 pounds.
I've got 265/35/18 & 295/35/19 Michelin Pilot Sports and I juust about guarantee that they weigh close to 14 & 16 pounds respectively.
Something is a little out of whack there.
12-17-2004, 11:23 AM
#47
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Originally Posted by 2k1 Vette
I've got to agree with this one.
Normally I would shudder at the thought of disagreeing with ET but this doesnt sound like it could even possibly be right.
Unfortunately, I cant find any manufacturer specs from either CCW or Michelin to confirm their weights but there is no way that that your tires and wheels weigh 14 & 16 pounds.
I've got 265/35/18 & 295/35/19 Michelin Pilot Sports and I juust about guarantee that they weigh close to 14 & 16 pounds respectively.
Something is a little out of whack there.
Normally I would shudder at the thought of disagreeing with ET but this doesnt sound like it could even possibly be right.
Unfortunately, I cant find any manufacturer specs from either CCW or Michelin to confirm their weights but there is no way that that your tires and wheels weigh 14 & 16 pounds.
I've got 265/35/18 & 295/35/19 Michelin Pilot Sports and I juust about guarantee that they weigh close to 14 & 16 pounds respectively.
Something is a little out of whack there.
with you.My pic above shows the CCW street 18x11 1/2 with a Michelin PS 335/30x18 at 51 pounds total weight. I have not measured the OEM polished 5 spoke with the GY Run flat yet.
12-17-2004, 11:36 AM
#48
Race Director
Originally Posted by tlaselva
Yes and no.
If you need linear traction, you'd be better served with a 17" rim with a D/R or racing compound. I chuckle when I hear people spending $$$ by going with a wider tire in the rear thinking it'll assist with linear traction, then go with a street tire.
Everything being equal, a 265/40/17 will grip better than a 345/30/18 in a straight line. The extra height in the 265 will assist grip much more than the extra width on the 345.
If you need linear traction, you'd be better served with a 17" rim with a D/R or racing compound. I chuckle when I hear people spending $$$ by going with a wider tire in the rear thinking it'll assist with linear traction, then go with a street tire.
Everything being equal, a 265/40/17 will grip better than a 345/30/18 in a straight line. The extra height in the 265 will assist grip much more than the extra width on the 345.
None of my C5s are stock, so try taking tight wet corners at 55+ with a small tire contact patch on a 3680# car and see what ya get
Static and kinetic friction both result from the "stickiness" between
two objects. The origin of friction is not at all simple, and is the
subject of the field of Rheology. That is, one does not generally
derive the coefficient of friction, one measures it experimentally.
12-17-2004, 12:13 PM
#49
Safety Car
When I bought my Z06 chrome Rims I specified that I wanted the Factory GM Rims because of weight. Got them from House of wheels and I got a very good deal in my opinion.
12-17-2004, 04:47 PM
#50
Safety Car
Originally Posted by ALLTHROTTLE&NOBOTTLE
on the 18's, agree on the 19's and up.......As bought our vert came with 19's on the back...
If you have a big brake package you need 18's for clearance
And some of us need 345/35/18s on the back for wet/dry traction
You bought it used, I take it. My Vert came with 17's front and 18's rear. If you are talking about big rear brakes...why? The fronts do most of the work, and, again, big rear brakes are for show, not go (or in this case, stop). My rear wheels are 17 by 11 and my summer max traction BFG TA/KD's in 315/35-17 give great grip, accelerating, cornering, and braking. Yep, I'm a wuss, I slow down in the rain.
12-17-2004, 05:52 PM
#51
Burning Brakes
Just swapped my original, painted, 2004 wheels (cast, I believe on the painted ones) for a set of polished (not chromed) Z06 motorsports in stock C5 sizes (i.e., 17x8.5 and 18x9.5). I weighed both sets with a digital scale -- repeatability was great but scale resolution was only 0.5 lbs. Results: stock front - 20 lbs., stock rear - 21 lbs., motorsport front - 23.5 lbs., motorsport rear - 24.5 lbs. Approximately 3.5 lbs. difference, front and rear. (Don't forget the limited, 0.5 lb. resolution of the scale.)
Ernie
Ernie
12-17-2004, 06:15 PM
#52
Race Director
Originally Posted by 6Speeder
You bought it used, I take it.
If you are talking about big rear brakes...
If you are talking about big rear brakes...
, on the used vert!. I will see if I can sell the 19's & get 18s in the back. 19" = no traction with 375@wheels I would NEVER buy a 19" or bigger to put on anything I own
Only talking big brakes in the front thus the 18's needed in the front.
If you saw how I drive 24/7/365 you would know why I look for a large contact patch
Each to there own if it makes them
FWIW, here is a spread sheet I have started on tire/rim weights I have used through the years:
Wheel size,type, Weight IN LBS
OEM MAG 17 x 8.5 17.5
OEM MAG 18 x 9.5 19.5
OEM MAG 18 x 9.5 w/ new Yoko 295/35-18 AVS sport non-runflats 50
PWO 17 x 8.5 +58mm 20
PWO 18 x 9.5 +65mm 23
PWO 17 x 8.5 +58mm w/ oem runflat 245/45/17 w/ 8/32 tread 50
OEM MAG 17 x 8.5 w/ NITTO 555 275/40/17 1/2 tread 45
OEM MAG 18" x 9.5 w/ stock OEM 275/40/18 runflats 53
OEM MAG 17" x 8.5 w/ stock OEM 245/45/17 runflats 47
Bridegstone expedia S-01 345/35/18 37
OEM runflat 245/45/17 w/ 8/32 tread 29
BFG G-force drag radial 345/30/18 30
Topline 18 x 10.5 +58mm offset rims w/ 275/35/18 BFG G-force TA drag radial 53
HRE 18 x 9.5 545 w/ clear center +58mm 22
HRE 18" x 12 545 w/ 345/30/18 BFG DRS 57
HRE 18 x 9.5 545 w/ clear center +58mm w/ 275/35/18 BFG KDWs 52
HRE 18 x 12 545 w/ clear center +74mm 27
HRE 18" x 12 545 w/ 345/35/18 EXPEDIA S-O1 9/32 tread 64
HRE 19" X 10.5" 545 w/ Yoko 295/35-19 AVS sport non-runflats 5/32" TREAD 58
12-17-2004, 06:20 PM
#53
Safety Car
Originally Posted by dbhajek
Even though I am sure adding heaver wheels makes a difference I did not see much in the 1/4 mile. After adding reproduction polished Z06 wheels to my Z06, I have started using my stock wheels for DE events, I still ran the same time in Orlando. Maybe at my level of driving it doesnt make a difference, or it was so small of a difference I cant even notice.
Bud
Bud
Ed
12-17-2004, 06:40 PM
#54
The heavier wheels will make most Difference in cornering and braking......It will have some effect on acceleration, but probably nothing noticeable! If you really want to get the equation, hop on any serious motor cycle site, I used to Race a Ducati 916 sps, where wheel weight is a HUGE factor, and the actual equation would blow your mind, i will try to find it and post it here!!
12-18-2004, 09:23 AM
#55
Safety Car
Allthrottle: Good info, wish you had posted the weights for the C4 GS wheels, 9.5 x 17, and 11 x 17 for comparison. Very light and strong and plenty wide for big meats. I run 275 fronts and 315 rears. Corvette mag did a writeup years ago, a Z-51 coupe with these tires/wheels outran a stock Z06 on a racetrack.
12-20-2004, 07:02 AM
#58
Race Director
Originally Posted by B1Mario
So why does everyone buy the OEM Z06 wheels and not the OEM mag wheels? I would think the MAG wheels would be lighter and stronger? Is it just looks?
They have been "STEVE" tested for over 38K miles in the 1/4, autoxing, road racing, 700+ mile trips etc w/o issue. They look good but perform just as well IMHO.
They are not hard to find, but a good price is. They can be picked up for less than $250 each in VGC if ya shop around.
If they made them wider I would have them on my 97' for the ultimate test
12-20-2004, 08:50 AM
#59
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Originally Posted by Z06ufgrad2002
Yes, the aftermarket repro wheels are quite heavy and that is why I have stayed away from them. The prices look nice but, when you ask about the weight; it's amazing how much heavier they are when compared to the OEM wheels.
HRE, CCW and the others make very nice wheels but, they too are typically heavier than the OE wheels. Not quite as much but, they are heavier and the price tag is quite a bit higher as well.
HRE, CCW and the others make very nice wheels but, they too are typically heavier than the OE wheels. Not quite as much but, they are heavier and the price tag is quite a bit higher as well.
12-20-2004, 01:51 PM
#60
Team Owner
Originally Posted by B1Mario
So why does everyone buy the OEM Z06 wheels and not the OEM mag wheels? I would think the MAG wheels would be lighter and stronger? Is it just looks?
