Unsprung Weight

[michael6903]

Who really knows what those cheap ass, wide ass 17's 18's and 19's are really doing to the performance of your car? Most of which weigh 1.5 x's as much as the factory wheels, if not more.

[raulck_hn17]

dudde it sucks, i got sport max staggered the wheels in the back weight each 25lb, in the front about 19... stock lmao well around 13:redx:

[homeslicej2]

Holy crap! I didn't know they were that heavy. What sizes are they? And yeah, more unsprung weight isn't a good thing.

[Greg]

I saved 5lbs per wheel when I changed

[Dominic49]

when I had my bbs rs's they weight 22lbs each with tire... (16x8) stock (14x6.5) weigh 30 per corner...

[hellfire]

My 18x12's weigh 26lbs... ;)

Tyler

[michael6903]

Ok so basicly anybody that is willing to spend good money on a set of wheels will get a performance gain, or not lose any. Just trying to point out Why that set of volks, bbs, Hre, etc... is 500+ a wheel w/out tires!

Does anybody really realize what that unsprung weight is doing for your... braking, acceleration and actual power put to the ground?

[Nisxsz]

Ok so basicly anybody that is willing to spend good money on a set of wheels will get a performance gain, or not lose any. Just trying to point out Why that set of volks, bbs, Hre, etc... is 500+ a wheel w/out tires!

Does anybody really realize what that unsprung weight is doing for your... braking, acceleration and actual power put to the ground?

no, enlighten me please

[Greg]

its less rotational mass to stop/accelerate

[turboedsileighty]

no, enlighten me please

he jsut did in the last part of that post
u accelerat quicker, stop quicker, & put more power down where it matters

[Maki]

every pound of unsprung weight equals about 12lbs of sprung weight...... so if you save 10lbs per wheel thats about 480lbs of sprung...... think on that one guys

for you drag guys that is about .5 sec off your 1/4.... 100lbs = 1/10 sec

[wantboost]

ROFL!!!! not all volk, hre wheels are light...... just because it is expensive does not always mean you get what you pay for.

light wheel > heavy wheel. doesnt matter which brand generally speaking.

[babowc]

every pound of unsprung weight equals about 12lbs of sprung weight...... so if you save 10lbs per wheel thats about 480lbs of sprung...... think on that one guys

for you drag guys that is about .5 sec off your 1/4.... 100lbs = 1/10 sec

how the hell can you save 10lbs per wheel again?
that is craaaazy.

you can go forged, but it will still weigh similar or more than stock, if you upsize..
which is the main reason for new wheels.
upsizing.

[Greg]

how the hell can you save 10lbs per wheel again?
that is craaaazy.

you can go forged, but it will still weigh similar or more than stock, if you upsize..
which is the main reason for new wheels.
upsizing.

What?!? You don't have carbon fiber wheels yet? looooooser :gay:
http://www.autoblog.com/media/2006/05/dymagwheel.jpg

[Dominic49]

unsprung mass can also include control arms and other movable suspension pieces... but that affects suspension characteristics more...

[Casey]

it also highly matters where the mass is located on the rotational axis
hence heavier axels will not affect sprung mass nearly as much as a really heavy wheel due to the diameter of the axel compared to the wheel.

more mass further out from the axis = more centrifical force = more "unsprung mass"

in short?

lightweight flywheel lightweight driveshaft lightweight wheels
leave your axels alone jackasses

and dont buy HEAVY sportmax wheels lolzer

but also its much easier to slip traction on a lightweight drivetrain than it is on a heavy drivetrain.
great for you drifters not so great for you draggers


every pound of unsprung weight equals about 12lbs of sprung weight...... so if you save 10lbs per wheel thats about 480lbs of sprung...... think on that one guys

for you drag guys that is about .5 sec off your 1/4.... 100lbs = 1/10 sec



the 100 lbs : 1/10 second ratio is generally endorsed by most draggers...
but is not accurate by any means

[babowc]

unsprung..
basically anything below the spring.. thats how i see it anyways.

i dont think many people can warrant aftermarket lca and such.
maybe a few.. a real few on here.

less rotating mass = good.
yey.

[Dominic49]

e30 M3 aluminum LCAs 8lbs
e30 325i steel 35lbs..

although the alumi is more pone to fatigue cracking (say after 100,000 street miles) it is a hell of a difference...

[Casey]

e30 M3 aluminum LCAs 8lbs
e30 325i steel 35lbs..

although the alumi is more pone to fatigue cracking (say after 100,000 street miles) it is a hell of a difference...

holy freaking crap.... thats a HUGE difference.............
haha if i get an e30 ill get those :P

[BlackMage]

Your also forgetting that brake rotors add to the spinning unsprung weight which is white 2 piece rotors own.

But the Bullitt Stang Wheels and 235/45R17 tires on them weigh as much as my old stockers did.

[Barnacles240]

dont bullshit...get GRAM lights :)