srsairbags

anyone running 18x9 inches in front and 19x10 rear ( or 18x9.5F/19X10.5R) on their Z ? similar to how the track and nismo come stock ?

I did try to search but didnt find much info . . .anything special about this setup . . ? ? ? i mean advantages /disadvantages ?

I mean apart from the looks, and understeer . . i dont see any more advantages, any disadvantages ? ? ?

terrasmak

iTrader: (8)

front and rear sidewall will be the sameheight , thats about it.

srsairbags

you mean if F/R tire profiles are same ?

stock track and nismo come with different profiles i believe 40 in front and 35 in rear . . .

glenns280

thats what my grand touring came with 18,19 40,35

srsairbags

are you still on the stock setup . . ? ? did you like it ?

DavesZ#3

iTrader: (26)

The wheel diameters mean nothing with respect to "stagger". It all boils down to the choice of tire OD - that's what matters. The choice of a smaller wheel will save you a few dollars but other than that there's nothing significantly different.

sry110

iTrader: (17)

Abosulutely correct. You could run 26" wheels in the rear with a 3/8" thick rubber band wrapped around them and it would be just about the same as the 18" rear wheels with 245/45/18 tires that my Z came with.

The performance ****** might say that running 19" diameter wheel in the rear instead of 18" saps some power (albeit negligible power) because the wheel is larger diameter, aluminum is more dense (heavier per volume) than tire rubber, and therefore even though the 18" wheel has more tire attached to it the overall rotating inertia of the wheel+tire assembly would be less, therefore allowing you to accelerate quicker. Again, I think it would be negligible, especially so for street use, so I would just look at it from a cost versus aesthetics point of view.

Just make sure you select tire sizes that are as close as possible to the OEM tire outer diameters, for whicher wheel diameters you choose. Otherwise your speedometer, odometer, TCS and VSD (if so equipped) systems will not function properly. Plus it would probably look dumb.

ssgohan434

iTrader: (13)

^ bingo!

The rolling weight/inertia of the front wheels is reduced by being 18"s (compared to 19"s all around), yet the rears are still 19" to fill out a larger wheel well

scotts300

iTrader: (46)

I don't really like a 40-series 18" front wheel, hence 19s all around on the street for the wife's ZR (and 18s all-around for all 3 of my Zs set-ups).

terrasmak

iTrader: (8)

NO, I SAID SIDEWALL HEIGHT.

The normal 245/40-18 has a sidewall height of 3.9 inch, then the rear tire you would run on this setup is a 275/35-19 has a sidewall height of 3.8 inches. Nearly identical, compaired to a normal 275/40-18 with a sidewall height of 4.3 inches.

srsairbags

thanks dave and sry110

"staggeerd" is not a good choice of word . . . i know that it has to do with wheel width and not the OD . . .

for y setup i was thinking of the 18F / 19R enkei rpf01s

FRONT: 18x9 (dunno offsets yet) weighs around 18.5 lbs with 40 profile tire (dunno what size yet)


REAR: 19x10 weighs around 21 lbs with 35 profile tire

enkei says : every pound of unsprung weight savings has the effect of reducing overall vehicle weight by 20lbs.

do you guys think thats true ?

srsairbags

ooohhhhh . . i get it now


oowww wait im confused now . . is tirewall height and section height the same thing ?

http://www.tirerack.com/tires/tirete...e.jsp?techid=7

scotts300

iTrader: (46)

Other sources have said each pound is the same as 4 pounds. The net effect is also a function of the weight and HP of the car. A low HP car like a Miata will benefit more from 2# lost per rear wheel then a high HP car like a Corvette.

srsairbags

cant trust enkei . . .

here is what they say about their manufacturing technology

" MAT Technology
Enkei developed a new manufacturing process to produce the next aluminum wheel generation. The Most Advanced Technology (M.A.T) "

sry110

iTrader: (17)

Haha well, there is definitely a separation between the engineers and the marketing guys. If they actually had the "Most Advanced Technology" I'm pretty sure they wouldn't be in the automotive wheel business.

I wouldn't worry about their quality too much....plenty of people on here use Enkei wheels and I haven't read about too many issues.

davidv

iTrader: (2)

Never in the course of human history has anyone attempted something of the magnitude.

srsairbags

http://www.enkei.com/rpf1.html

srsairbags

i know theyre good . . . its just the marketing folks trying to be too creative . . . . . . .

sry110

iTrader: (17)

And they are doing their job to the fullest!