ForsakenRX7

Does anyone have the exact size and measurements for these wheels? I was thinking of having mine powdercoated black. But then I got to thinking about whether it was worth it or not cause I didnt know how wide a tire would fit the rim. Anyone have pics of these wheels on a car in black and the specs?

T24U

I am here to save the day. Trust me on this, I have the same rims, and a 1990 Turbo II also. The EXACT measurements (I measured it myself) are 16X7.5. Many specs for it say 16X7, but like I said I measured it myself with a wheel caliper. OK, so the size is 16X7.5. I mounted some 245-50-16's in the back, and that's the widest you are going to get on those rims, but they look GREAT from behind. I would suggest 245-45-16 as the optimum size for the 1990 TII rim. It's the closest in diameter to the stock 205-55-16's. The 245-50-16's are close but still about an inch larger in diameter, which only means that you'll be traveling at around 61 when your speedo says 60, I did the math. The 245-45-16s are only .3 inches or so larger in diameter and should not affect the speedo but maybe .25 of a mile per hour difference..

hope that helps, take it from me, I measured it and mounted and balanced the rims myself, I had people telling me I would need spacer, the ride would suck, etc.. it's all good..

My car is not lowered however, so my results may be different than a lowered car, but I don't think it would matter much especially if you went with the 245-45-16s.

Icemark

no they are 7 inch, not 7.5.

You need to measure the inside where the wheel fits for an accuarte width.

If you measure outside it will be 7.5" but wheels are not measured that way.

T24U

That's what I did, measure from the inside of the lip, you don't measure from the weight mounting point - to weight mounting point. You measure from the inside of the lip. If you have rims that you have to static balance because they don't have the standard lip for mounting AW or AIW weights, then you must measure the width from the outermost parts of the rim.

Icemark

????

if it doesn't have a standard sized lip then you use tape-a-weight.

You measured from the worng spots. The GTUs/T2 wheel is a standard 7 inch wide wheel.

And static balance??? Has anyone static balanced anything but a truck tire in the last 20 years??? High speed spin balance is used everywhere and doesn't require you to measure a wheel.

T24U

The machine that they have at work must be ancient then??

Turbonut

iTrader: (1)

One thing I might add is that the newest high speed balancers, do require input of rim width so as calculation/placement is of weights are correct. Where he may be confused is that the measurement device supplied by manufacturers measures the outside to outside. Something like a large caliper.

Icemark

ahh see Don, you learn something new everyday.

Maybe he has that, then.

TonyTurboII

I static balanced my S5 TII wheels.

Josepi

Isn't that were you stick them on the stand and the rim wobbles around?

T24U

No basically a static balance is for rims that don't have the lip on them, like chromes or something. Since you have no where to mount the weights, you have to static balance them, instead of putting weights on the inside, and the outside of the rim, they are placed sort of in the middle. Most people do a standard 2-plane balance, which is one on the outside, and one on the inside. The balance machine that I use you have to input the measurements for the inside of the outer diameter of the rims, the width of the rim, and the size in inches that the rim is.. then you spin it and it gives you the locations on the inside and the outside to mount the weights. When I measured the rim, I used a rim caliper somewhat similar to one that you use to measure the width of your rotors, for example.

I two plane balanced my rims, but since the 245s were so TIGHT in the back on the stock S5 rims, I had to use sticky weights on the inside (a standard weight would not pound in), on the outside I was able to use standard weights. Normally I don't use sticky weights unless I am static balancing a tire. This time I had to because the weights would not hammer in from the inside..

Hope that clears things up a bit.