Don't quote me, but 30 seconds of Google says that the factory Mazda spare is often a 4" wide wheel.

 

Too heavy?

 

Heavy and not rated for more than 65mph in the quarter.

 

Between this discussion, many internet searches, and some comments from Sonofthehill, I think wrinkle wall slicks, which I understand also means a driveshaft hoop, and my 195-50 Dunlops on the front. We're talking 105mph in a straight line. Slicks will be M&H 23 x 7.5, Part Number MHR-021.

 

So, say i have a 14x6 rear wheel. And the need for wrinkle wall slicks.

what size? Again, planning 325rwhp/325 torque.

and yes, both halfshafts and driveshaft need safety loops per nhra

 

Pick up a couple of 15 x 6 NB1 rims and use what I quoted above. I don't see anything available for 14's, except Mickey Thompson in a 26" diameter. 13's or 15's.

Where are you located?

Crap... and halfshafts? That might change my approach. No hop, no care.

 

my track never checked for a loop, but yeah you should have a driveshaft loop. I think If you just made a loop to enclose a section of the PPF it would be ok. 23x8x13 MH is what you want. the 13's will fit over stock 1.8l brakes.

 

The 15x6 will be have my sm7 autocross slicks.

im outside Charlotte nc

 

Someone needs to do a drag car with 15 x 6 6UL's in front and 15 x 12's in the rear. I'm not normally a "drag race" guy but when I do, I'd do 6UL's.......

15" wheels

 

This article is (slightly) relevant to this thread:
https://blog.caranddriver.com/how-mu...-ford-mustang/

 

That's unfortunate. You will fail.

 

Dead weight. 10's are enough for 1000 hp. Bp's don't make 1000 hp.

 

The key to success on a mildly built Miata is use the smallest slick money can buy. My best 60’ was 1.719 on a set of 20”x8”x14” on stock wheels way back in the day when I was running nitrous. At the time the car was mostly stock with an open diff. My car is a base model.

Those tires aren’t available anymore. Today I run 22x8x15.

 

Lots of local sources for the 15 x 6's for you. I have a pair here you could drive down for.

Is that for the extra sidewall height, more flex?

 

Yes I would run the 23’s over the 22’s personally for more side wall flex and to match a normal street tire diameter better

 

I don’t think the extra sidewalk is any benefit at all. If anything, for lower powered cars it may hurt. You get the benefit of less rolling resistance with less sidewall, and in my experience you can 60’ exceptionally well with a very small tire. I have very little wheel hop with the lower profile tires.

In a much higher powered car it’s another matter.

 

What qualifies as "much higher powered"?

Asking for a friend

 

In your ‘friends’ case, 24.5x8x15 Mickey Thompson and 4.10 gear

 

I did some more looking. Donut TIRES are not NHRA legal. Donut rims are not discussed, that I could find. They will fit Front Runners from about anyone.

In Australia, the rims are not legal.

I have ordered the Rule Book.

 

You also can't run a sub 13 second pass without a roll bar. I've been talked to about it.