30mm offset?

Pistolmiller · Post by **Pistolmiller** » Tue Jan 09, 2007 8:27 am

If I am going to dedicate a set of wheels to racing, what is the disadvantage to going with a 30mm offset. Is thiis "too much" for a weekend racer?

ronbauer · Post by **ronbauer** » Tue Jan 09, 2007 8:38 am

If I recall correctly, 30mm is what we used on the Spec Miatas with the Pro Race wheel.

Definitely not too much for the car. I suppose in theory you would go through wheel bearings quicker, but that's a common part to replace regularly anyway when tracking a car.

BTW, I'm assuming you're asking this question for a NA/NB?

Ron

Pistolmiller · Post by **Pistolmiller** » Tue Jan 09, 2007 8:45 am

yes, it is a 2002 w/sports package. I have been making several choices since I recieved some money from Santa. New shocks and springs and wheels and tires. I am looking at the Kazera 15x7 w/ 30mm. The car never sees the road except for Sunday racing and the occasional track day.

ronbauer · Post by **ronbauer** » Tue Jan 09, 2007 8:52 am

Okay, I just verified that it was the 30mm offset that we used. Worked great and gave the car a wider track. We ran these on the NAs.

The only thing I'm unsure of is whether you'll have any rubbing issues on the NB. I wouldn't imagine that you would, but Brian should be able to answer that.

Ron

Pistolmiller · Post by **Pistolmiller** » Tue Jan 09, 2007 8:57 am

That is something I would really like to know before I make the deal!

Brian...

Post by **Brian** » Tue Jan 09, 2007 9:04 am

As Ron notes, the 30mm is the choice of most Spec Miata racers. That's because it proves a little faster than choices such as 35mm and 40mm. There is more room in the fenders on NB than NA so fitment is usually pretty easy on NB for a 205/50/15. Nonetheless, variables include how much negative camber you set and how low you set the car. And, if you later add a blower or turbo and want to run more tire (such as 225/45/15), then you would be better off with 35mm. And if you want a guarantee of no fender rub and no potential need to adjust fender lips then stick to 40mm.

Pistolmiller · Post by **Pistolmiller** » Tue Jan 09, 2007 9:25 am

That is something I would really like to know before I make the deal!

Brian...

Pistolmiller · Post by **Pistolmiller** » Tue Jan 09, 2007 9:30 am

I am not going to add a turbo at any time....

So, if I am going with the 30mm, and get an alignment for"typical auto x" cars, there will not be a problem with rubbing?!? We have a guy in our region that soecializes in miata alignments. I would assume that he would be able to "judge" this when he does it?

Post by **Brian** » Tue Jan 09, 2007 9:36 am

Yep, should be fine...

Pistolmiller · Post by **Pistolmiller** » Tue Jan 09, 2007 9:38 am

Last question....

...even if I have put shocks and springs on it that have lowered it an inch or so?

Thanks for the help Brian...I will be ordering today!