C5 325mm/305mm brakes with Year One cast 17x9 Snowflakes - Does it work?

[Henesian]

I have a 76 T/A with Year one 17x9 Snowflakes and was wondering if anyone has done these rims with the C5 brakes?

[wcharl]

this might help:
https://www.pro-touring.com/showthread.php?70960-C5-brakes-with-year-one-snowflakes

[Henesian]

Thanks. That partly helps. I still need to know if the wheels can clear 1/2-20 studs and what kind of lugnuts will fit.

[Apogee]

The Y/O wheels use standard 60 degree conical seat lug nuts AFAIK, so you should be able to run anything up to M14 or 9/16" wheel studs if it's like most other aftermarket wheels on the market today with .60" or larger through holes.

Edit: So after contacting Marty Thomas at Y/O, I stand corrected. These wheels are designed for their QJ39 shank type lug nuts and they only offer lug nuts for 7/16-20, although any similar 1/2-20 or M12x1.5 should work. If/when I get the hole diameter and length through the wheel, I'll post that up as well.

Tobin
KORE3

[Henesian]

Ok. Then, I need to measure the holes.

[jpgolf14]

If 1/2" studs don't fit, I'm not sure what will. 1/2" is only 0.03" larger than stock M12 studs. I'm sure they will fit just fine.

[Henesian]

I'm only asking, because the 17" snowflakes are meant to be used in direct replacement of the 15" snowflakes(if that's your style), and use the stock lugnuts and wheel studs, which are 7/16"-20 studs.

[Skip Fix]

The repro 15" snowflakes use the stock one piece with flange or mag style shank/washer lug nut I thought one of the guys on PY had to convert his 17" to conical for 1/2" studs for his hill climb car. But I have not personally looked at them. And talking to Year One tech is hopeless to get any real info.

With the 15"s and 1/2 studs mag lugnuts are 0.681 OD and the holes in wallowed out orignal wheels arounf 0.735 and Year One repros 0.750. So no big deal if you have a correct hub length to locate the wheel-after market axles with a rotor don't locate it.

[VCT-TA]

I am looking at the same set up from my 77 TA. I sent the Kore3 325mm fitment template to Year One and below is the reply I received yesterday from Marty Thomas.

"The template seems to clear. Closest point is the lower front corner of the caliper area but it did not actually touch the template. Since it is close I recommend you trial fit this before mounting tires. If it does not in fact clear it should clear with a small spacer.
Marty"

I did not inquire about the 305mm, I guess it should fit if the 325 fits. Hope this helps.

[VCT-TA]

Tobin
What are people doing for wheel studs and nuts? The YO 17" Snowflakes clear but they use special 7/16-20 lug nuts and your tall spindle 325mm brake kit only offers 1/2-20 or M12x1.5 studs. I am looking at this same set up for a 77 TA.

Is someone selling a 1/2-20 lug nut for the snowflake wheels?

Thanks
Dan

[VCT-TA]

I managed to find of three sources for the 12x1.5 lug nuts for Snowflake wheels. I don't know for sure that these will fit, but there is a good chance that they will.

I did not find any 1/2x20 lug nuts this style.

Please let me know if you find out anything from Year One, Marty Thomas.

Sources for M12x1.5 Snowflake Wheel Lug Nuts:
www.ezaccessory.com/Corvette_OEM_Style_Lug_Nuts_12x1_5_p/98-0001m.htm
www.tulipcitywheels.com/tcwstore/index.php?l=product_detail&p=1709
http://stores.ebay.com/lugsnstuff

6079360794

[Henesian]

What I'm running now is like this

http://www.summitracing.com/parts/GOR-74177/?rtype=10

I was just thinking of getting the 1/2-20 version.

http://www.summitracing.com/parts/GOR-74187/

This style works pretty damn well, and I get ALLOOTTTT more thread engagement than you do with the stock nuts. I honestly hate the stock style nuts. Not enough thread.

[Skip Fix]

I agree the stock ones don't have enough engagement. Again you need to look at hubcentric vs lugcentric with rotors and aftermarket lug nuts with the wheels.

Right now I have the extra '81 Turbos,lugnuts like the snowflakes, on Mosers with rear discs and 1/2" studs and open lug nuts. There is so much free play and no hub to locate I can easily get the wheel off center. No problem putting in and out of the garage. I also had to slightly cut down the length of the shank in a lathe so it would not bottom out in the wheel on the hub. I just need to make some bushings for the lugnuts to make it a better lugcentric or turn the axle pilot down and make a longer bushing for it to be hubcentric again.

I also wonder if you use those 12.5M lugnuts if the studs on the 1LE hubs or on the C5 kits will be too long and bottom out in them. Wonder if they just drilled and tapped some factory copy lugnuts?

[Henesian]

Yeah. With the stock 15x7 snowflakes, I ran a 7/32" spacer to get it to work with the long lug nuts, but it was so secure. They never started to loosen up, and they covered the whole stud in threads. On the 17x9 snowflakes, I took the spacer out, and the center of the wheel is so thick and heavy that the nuts bottom out no problem with no excess threads or any problems without any spacer. They have no problem centering and there is virtually no play, even with my original axles and rear end. I'll have to take a picture or a video or something.

[VCT-TA]

I was woundering if the shank on those GOR-74187 lug nuts were too long for the 17x9 Snowflakes, but it sounds like that they are just right.

Are you using washers with them?

Yes please, could you post a photo or two of how the snowflakes look with those style lug nuts?
Thanks

[Skip Fix]

Do you have a dial caliper to measure the lugnut hole OD on the snowflakes you have? My old factories measure around 0.735, I was wondering what the 17's measure, also their weight. I'm looking to put them on my 78 when it gets shifted to corners from 1/4 mile.

[Henesian]

Tobin
What are people doing for wheel studs and nuts? The YO 17" Snowflakes clear but they use special 7/16-20 lug nuts and your tall spindle 325mm brake kit only offers 1/2-20 or M12x1.5 studs. I am looking at this same set up for a 77 TA.

Is someone selling a 1/2-20 lug nut for the snowflake wheels?

Thanks
Dan

Yeah, I use washers with them. They came in a kit with washers, wheel locks, and valve stems. I just dont remember the part number for that whole kit.

[Henesian]

Do you have a dial caliper to measure the lugnut hole OD on the snowflakes you have? My old factories measure around 0.735, I was wondering what the 17's measure, also their weight. I'm looking to put them on my 78 when it gets shifted to corners from 1/4 mile.

I have calipers Yes.

[Henesian]

https://static1.pt-content.com/images/pt/2012/06/IMAG0397-1.jpg
https://static1.pt-content.com/images/pt/2012/06/IMAG03961-1.jpg

I couldn't get calipers on the lugnut hole with the tire on the car. We have a 30 year old set of Starrett Verneers.

[Skip Fix]

I had to measure from the back side to get pretty close. Also used a snap gauge in the hole then measured to get a better number.

[Henesian]

Alright I just got more measurements.

the Lug nut SHANK O.D. is this
https://static1.pt-content.com/images/pt/2012/06/IMAG03981-1.jpg
And the length of the shank is 3/4", and the length of the whole nut is like 1-2/3"

What we bought was this

http://www.summitracing.com/parts/GOR-73973/

http://www.summitracing.com/parts/GOR-73983/ - 1/2" version, but same measurements. The nuts in the picture look totally different though. That's weird.

[Henesian]

Alright I just got more measurements.

the Lug nut SHANK O.D. is this
https://static1.pt-content.com/images/pt/2012/06/IMAG03981-1.jpg
And the length of the shank is 3/4", and the length of the whole nut is like 1-2/3"

What we bought was this

http://www.summitracing.com/parts/GOR-73973/

http://www.summitracing.com/parts/GOR-73983/ - 1/2" version, but same measurements. The nuts in the picture look totally different though. That's weird.

I just realized while eating lunch today that those nuts wouldn't work, because the shank probably isn't long enough for the wheel studs on the Kore3 front hub.