R888's are not exactly a rapid wear tire. I ran R888's this year on 3 track days, one hill climb and approx 5000KM and they were not even near the wear bars yet. I know one guy who ran R888's on his BMW M3 for over 20,000KMS of street use only. Have fun in the rain though...

 

Depends on the compound maybe..I've had 15" SG compounds that lasted 3 trackdays under an underpowered boatanchor.

 

15x10 6UL, 245/580R15 Hoosier R80, Autokonexion +30mm fender. I also cut the lip off the fender (what you would normally roll on a steel fender) to make sure I still had 90* of wheel input at full bump.

It fits

 

Those 10's with the extra concave compared to the 9's are beyond sexy. Its such a shame we will not see a street tire for them anytime soon. It almost makes me want to stretch 225 rs3's on there just to have that sexy rim on a daily basis.

 

I know its sacrilegious, but I am really contemplating running these daily with stretched tires....

 

You're right I forgot about the E-marking thing. A few years ago it was alittle bit different in Holland, as you didn't need an E-marking on your tyres.
Where did you get this info about other semi's becomeing illegal? I hope that's just a rumour, as that would eliminate avery wide tyre choice we have here for Miata's.

 

*

 

Regarding EU E-markings, there was a turmoil a few years back when the HA-oils were banned, but it was solvable (just purify the additives to go below the bar) and it will be the same thing whatever changes they make (unless they ban everything with TW<200 or similar (it must of course be a new measuring standard)).

I personally lack 225/45-15 in anything else than R888 (RS2 is not an option).
Kumho V70A have worked nicely for me in 205s (1% faster than R888 and don't overheat as badly), but it has been a long time since they produced 225/45. Order 100sets and they will make a batch (so I've been told by Kumho Motorsports)...
I don't like the feeling of 225/50, feels like off road tires.

 

You can get the R1R in 225/45/15 here, but I feel it's more of a street tyre than an actual racing tyre.

 

Looks great! I am really digging the nickel color rims.

 

Just noticed this. I promise you that the 235/50s will not fit, even if you flare the car. If you want 235/50s, and you expect to drive the car hard, you will need to tub the car front and rear and run a very low offset wheel. Flares only help with fender clearance - if you are driving a tall tire up into the top of the fenderwell, flares won't help.

The issue is the height. Because that's a 24.25" tall tire, you will need to run a taller bumpstop in order to keep the tire clear of the top of the fenderwell and shock tower. Because the bumpstop is taller, you lose bump travel if you maintain ride height, or you lose droop travel if you raise the car to compensate. The only way to maintain travel would be to run a custom shock that's sized to maximize travel at a 4.7-4.9" pinch weld height, and if you have that kind of coin, you should just be running R80 Hoosiers instead.

You will also rub the front bumper and the back of the fender when turning, both due to the height of the tire.

This is why you have to stick with a tire no taller than 23.0", regardless of how wide it is. The three popular Miata tire sizes are 205/50 (23.0"), 225/45 (22.9"), and 245/580 (22.9").

 

http://www.westermann-motorsport.com...245-40-15.html

There you go opgedronken
245
22.7"
Just a measly 1050$ before shipping, so not much more then the toyo 225 equivalents. And its a streetable tire too (kind off).

 

+1

I’m completely eliminating the stock fender wells just to run a 23.5" OD tire. 23.5X11 R16 to be exact.

23" OD is max you can run and have a proper working suspension in combination with the stock wheel wells regardless of what flares or fender lip mods you do.

Bob

 

Thanks for this elaborate reply!

I do not intend to track the car at all, there really are no feasable options in holland.
This setup would be purely street driven, and not intended to be the most "functional'.
I'm wondering then how do people drive on their 225/50/15, or a very commonly used size 215/40/17?
These are both about one centimeter less tall then 235/50/15.
The front fitment wouldn't trouble me that much as I wouldn't even think about using 235 there, more likely a 225/45/15.

As for the 245/40/15 Avon's they're actually pretty affordable down here, it's just that I'm shooting for a particular look .

 

no one really uses 225/50/15s. There were some previous attempts at fitment, but I think most gave up.

i don't know about 215/40R17, thats probably an NC fitment if anything.

 

That wheel looks bauce.

 

It's very commonly used on 17" tuner style wheels, atleast here in Holland it is.
I've dug up a quick pic of a reletively fat tyre in that size, and I have to say it looks pretty doable.

Edit-- 205/45/17 is slightly higher than 235/50/15 even!

 

This thread needs more pics of 15.10 6UL's installed on a miata with autokonexion full fenders. Pics like Sav's....just more of them.

 

that tire is likely to be 215/40R17. Try it if you want, but you have gotten our guidance already. I think 23" is a pretty clear and easy number to understand.

+1, yes please.

 

Stock size on the MSM is 205/40/17, 215/40/17 can be run without rubbing at stock height. I ran 615Ks in 215/40/17 before upgrading to a 6UL/RS3 combo. Never had any rubbing at stock height on street or the one track day it saw. Once the car was lowered rubbing was easily induced with dips in the road or mid turn bumps at silly speeds.

No rubbing on autox courses with 225/50/15 V710s on 6ULs.