15x10 6UL @ 949 Racing
 

After several years of mulling it over, the 15x10 6UL is finally going into production. Demand is now sufficient to support a new LP cast tool and production run without the wheel costing too much.

Now Taking Orders for August 2011 shipment
15x10
13.5 lbs
4x100
+25, 6.45" back space
VIA certified
Clearance for 11.75" rotors and Wilwood DP6 calipers

There are no street tire sizes available to fit these and probably never will be.
These are a DIY, hacking fender open for flares, race slick only fitment.

Visit the website, email or call us for questions about ordering.

http://949racing.com/ProductImages/15x9_6ul_b_big.jpg

Yesssssssss....Will 225's fit? I see on the site they're not listed but I know tons of guys with a stretch with tires that technically shouldnt be on the rim. Hoping they will work considering I dont want to street slicks and I'd rather have these over the 15x9s

so anybody know if my wife would be pissed if i bought a second set of 15x10's hmmmmmmmmmmmmm :laugh:

Gonna try to get some ordered

Emilio, any thoughts on these being appreciably faster than the 15x9s? When I ordered my 15x8s you told me I should have gotten 15x9 for this reason. For a 225/45 R-comp is there a reason to run this over the 15x9, or is this to be considered more for the 275 crew?

What's needed for this to fit a first gen miata?

:werd:

Explain this:

FYI: Goodyear will likely have a 275/3515 in their new Eagle RS in RC (road race) and AC (autocross) compounds by the end of the year. We don't offer tires, just letting you all know you have a new option.

A street tire 275?

A sledgehammer is a good start. We will document the mods necessary to tuck a 15x10/245mm tire under a stock NA, but it's not going to be a quick fender roll. Expect to pull the fenders significantly front and rear or flare the car.

Once again I'm sorely tempted to get a set.

Have the options for tires gotten any better? As much as I WANT to run 275 Hoosiers... I have a hard time rationalizing the cost/benefit for an open trackday format.

Any nice street/track tires that are 245 or wider these days?

Crap... There goes all my beer money.

15x10 FAQ
 

I know of no 245/40 or 275/35 street tires planned or otherwise.

Two companies are developing a 245/40/15 R compound (racing only) DOT radial tire. I can not tell you any more about those tires.

Expect to have to do some surgery to your fenders to fit these. 949 Racing will not offer instructions or a fitment guide for the 15x10. It's 100% DIY.

The 15x10 is not recommended for tires less than 245 section width.

Assuming 245/40's or 275/35's the 10's will be measurably faster than the 9's. This has already been shown by the many CSP and Trackday cars that switched from our 9s to custom three piece 15x10's.

Will a 15x10 6UL with 275/35/15 A6/R6s or the other DOT-Rs in the same size clear XIDAs on the inside without the use of spacers on a NA? How about other shock assemblies? What will hit first, the spring perch? The outside fender looks like an easy problem to solve with the appropriate tool(s).

Ditto for the DOT-R 245/40/15. I hate spacers.

Dunno really. Will depend on camber too.

So when will there be more tires available for this wheel? I read other threads about the 245 becoming available but no as of yet.

My god. Awesome.

Finally...a set of wheels I can put my 195's on! I've been waiting years to one-up the CR people and this will be perfect!

Took me a second to understand the joke.

rofls haha

sad thing is I already read that comment there :eek:

You have got to be kidding me. When I got my 15x9"s they had 195's from the previous owner and the tire literally didn't seat on the outside of the beads on both sides of the rim, it was ridiculous. I dont think they would even hold air on a 15x10.

First post! My question is... clearance aside, what tire size would you need to keep the same outer diameter as the stock tires?

245

For DOT tires
Road Race and Autocross
275/35/15 Hoosier, and rumor has it that Goodyear is going to start making that size in road race and autocross compounds as well.

245/40/15 Avon makes a tire that size for Lotus I believe and it looks like a race tire that could be usable as a street tire similar to a Toyo R888 but difficult to get in the US. Rumor is a couple other tire manufacturers may be tooling that size as well. I think that size would stretch nicely on a 10" wheel.

Non DOT race tires
Hoosier and Goodyear I think both make tires that could work on a 15X10 with workable outside diameter I think.


Overall Diameter is key. Cutting and flaring for width is easy but much bigger overall diameter and your into tubbing the fender wells to retain sufficient suspension travel for a proper handling car. Probably want drop spindles as well.

Bob

I have done fairly extensive clearance and articulation studies on my car which is set up pretty well and determined I need an ET of 20mm for proper clearance on the inside both front and rear. So 5mm spacers for me with the 15X10 6UL’s.

On the front it hits the bump on the inner fender around the shock top. Peeled off significant chunks of the inside corner of the front tire in a high grip sweeper when I tried spacers to an ET26 with the 9” wheels. In the rear actually the sidewall of the tire hits the frame just above the shock top where there are two bolts heads sticking out at full bump with ET26.

Note: Using NB rear knuckles will have an eqivelent effect as adding 5mm spacers for the rear. The geometry of the knuckle pushes the wheels out 5mm more than the NA.

My suspension setup is -2.8 in the front -2.5 in the rear. And I use all the available bump travel the NA chassis has to offer with my currently tuned for maximum bump travel custom DIY shock tops. I also use the 2.25” springs like the XIDA and no problems there.

My Double adjustable XIDA’s show up next week. Happy birthday to me.

Bob

CAD rendering from a few months ago. Color is off a bit but you can see the slightly concave face of the 10.

http://949racing.com/15x10/15X10_6UL_590px.jpg

Wheels still scheduled to arrive in August? If so, any idea on early or late? :bowrofl:

Hoping so. We'll see.

Oh and thanks for quoting the pic. I dig that.

Hmmm....I'm gonna need a sarcasm meter on that one. I hope they come in my car should be finishing up by then. BTW I actually like that color on the pic above:makeout:

Dear God I can just see the clubroadster post.

"Can I haz 195/50/15 on the 15x10 6ul"

"Bro you'll have Mad stance yo."

*

Damn. Nice job Emilio.

Updates on delivery status?

delivery status? they havent been produced yet as far as I'm aware.

suppose to be here in August. I would think still two months out.

Assuming you didnt read the first post..."August delivery" Why put that if they haven't been produced yet?:jerkit:

Some last minute design tweaks delayed things a bit. Sometimes the FEA tells you its perfect but a weakness is uncovered in destructive testing. Microscopic suff you need dye penetrant and x rays to detect. Still made our weight target and the wheels will be bombproof. I'm happy. At the beginning of the year, we embarked on a project to make all the 6UL's stiffer, more bend and crack resistant. Raised the max load rating, updated the certification. The 15x10 is the first of what you might call gen 3.

Best guess is wheels arriving in my warehouse mid September sometime. The OGK is gonna look pretty intense with the 10's and 245's.

Care to share what the weakness was. Just curious. If you cant that is understandable.

hurry up I cant wait to replace my spinwerks wheels!

That I even share that we found a weakness is more than any wheel manufacturer will ever publish. That's enough info.

Getting world class strength to weight ratios for the 6UL is an iterative process. Designing and manufacturing a heavy wheel to pass is easy. The 8 and 9" 6UL variants were no different. Several iterations before we reached the targets we set for those Gen 2 sizes back in 2008. The 15x10 is effectively a gen 3 design. The things we experimented with and learned here will gradually be incorporated into the 7,7.5,8 and 9" variants.

Once upon a time I remember you saying that the Avon 245s were only good for a couple of track days at the most. Do I remember this correctly, or have things changed?

I only tested one set 5 years ago. It's a super soft tired intended for a 1300 lb car, no steel belts. I doubt they'll be any faster than a 225/45 Hoosier A6 on a 9. Tread life wise, you'd be better off with 225/45 NT01's on 9's.

When the new 245/40 DOT race compound radial hits the market early next year, it will be the tire to have for those that don't want to run 275 R6's but need more grip that 225/45 NT01's on 9's.

I'm sure RSR Motorsports would be appreciative of that, THEY know how to kill a 6UL - when buying their take-offs in the spring, they said they go through them like candy with such a stiff sprung car, like 900# rears or something crazy like that...

In for new porn when they arrive.

can't wait to see this on a miata!

What inside info do you have on these 245's coming out next year? Will the NT01 be available in that size? Will it be replaced by a better tire?

Nothing to share at this time.

The inner lip of my 9's make contact at full-lock w/o spacers. Since the offset on the 10's gives 2mm less inner clearance than the 9's, I assume this will have the same full-lock clearance issue and need small 3-5mm spacers to correct? Or has this issue been taken care of for Gen 3 wheels?

It's not a flaw. There just isn't enough room for a 9" wheel in a car designed for a 5.5" wheel. Expect some DIY fitting issues with 10's as well. They are nothing near PnP.

I agree it's not a flaw. Wasn't saying it is. Just wanting to know how it is on the backside to account for that extra space on the front.

You won't want the 10's, you obviously can't handle it.

Thanks for making the decision for me. I'll stick with my 9's then. My bank account thanks you.

If you're already crying like a bitch about the 9's, you don't want a 10".

My 9" fits perfect.

I don't know why you have an issue with me asking a legit question, but whatever.

10's are where it is at. i need some more.

I think my 9s have rubbed maybe two or three times. Just stop turning to full lock. Doesn’t take long to learn where the contact point is.

Yea, I was just wondering if anything changed on the 10's. Emilio answered.

Let's keep the bs to a minimum. smoke, you're asking a valid question, hustler apparently woke up on faeflora's side of the bed.

First production sample. 13.7 lbs. We did a pilot run of a handful of wheels that will be at Solo II Nationals in Lincoln, NE. To expedite getting this wheel here, we didn't machine the lip, which the production wheels will have.
https://www.miataturbo.net/attachmen...ine=1313438058

^ They look great - will be interested to see if any tire manufacturers follow suit and offer more choices to take full advantage of the wheel width. I've got three pairs of 6ULs - tempted now to order a fourth.

If they left Taiwan at the same time, what is the air speed velocity of an unladen swallow such that both it and my 15x10s arrive together?

An African or European swallow? or Asian swallow?

Pic I swiped from Scott''s facebook page, posted from nationals this week. These are 4 of the 12 pre-production samples I had flown in from Taiwan for a few drivers just in time for nationals. We didn't have time to get the lips machined, thus the solid painted silver.

Beautifully turned out car. Good luck to you guys!

https://www.miataturbo.net/attachmen...ine=1314809703