Which wheel studs?
Thread Starter
Drifting
Joined: Sep 2005
Posts: 1,371
Likes: 2
From: Gilbert AZ
Which wheel studs?
ARP 070-100-7713
.509'' Knurl Wheel Studs
Late GM (F-body, Corvette)
12mm x 1.5
3.250" long
5 per package
ARP 070-100-7708
.509'' Knurl Wheel Studs
Most late GM (F-body, Vette)
12mm x 1.5
2.5" long
5 per package
Are those the right wheel studs for a C6, which ones do I want to get? Trying to mount wheels over my brembo brakes. Need to put on a 1/2" spacer on the front to make them work. Whats the stock length of the studs?
.509'' Knurl Wheel Studs
Late GM (F-body, Corvette)
12mm x 1.5
3.250" long
5 per package
ARP 070-100-7708
.509'' Knurl Wheel Studs
Most late GM (F-body, Vette)
12mm x 1.5
2.5" long
5 per package
Are those the right wheel studs for a C6, which ones do I want to get? Trying to mount wheels over my brembo brakes. Need to put on a 1/2" spacer on the front to make them work. Whats the stock length of the studs?
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
ARP 070-100-7713
.509'' Knurl Wheel Studs
Late GM (F-body, Corvette)
12mm x 1.5
3.250" long
5 per package
are the ones I used. Get some open ended HARDENED LUG nuts too. and forget those aluminum beauty covered lug nuts ( stock)
.509'' Knurl Wheel Studs
Late GM (F-body, Corvette)
12mm x 1.5
3.250" long
5 per package
are the ones I used. Get some open ended HARDENED LUG nuts too. and forget those aluminum beauty covered lug nuts ( stock)
Thread Starter
Drifting
Joined: Sep 2005
Posts: 1,371
Likes: 2
From: Gilbert AZ
Whats a good place to buy the lug nuts from?
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
NAPA I got mine for $1.10 each a few years ago. When you get the new ARP studs in take one over to a NAPA store and tell them you want hardened lug nuts. Open ended .
If you dont get hardened lug nuts, then those Stock lug nuts MAY lossen or strip on the ARP studs.
If you dont get hardened lug nuts, then those Stock lug nuts MAY lossen or strip on the ARP studs.
Last edited by AU N EGL; Feb 19, 2008 at 06:46 PM.
Thread Starter
Drifting
Joined: Sep 2005
Posts: 1,371
Likes: 2
From: Gilbert AZ
Ah great thats good to know, and I can get them local!
Intermediate
Joined: Sep 2009
Posts: 26
Likes: 0
From: Fairfield NJ
I have a slight variation of the same question. I have a StopTech 4-wheel Trophy BBK and I want to use stock "Gumby" wheels. With 1/8" Pfadt spacers in front, the wheels clear the brakes and there is plenty of engagement on the stock length studs to be safe. However, the rear kit requires 1/4" spacers and that does NOT work with the stock studs.
So, can anyone tell me the length of the stock studs and if anyone makes aftermarket studs that are 1/4" longer. (Or 6-7mm longer, if the stud market speaks metric.)
So, this works in front:
but this does not work in back unless I install longer studs:
If only the 1/8" spacers had worked in the rear, I would be such a happy camper right now! But no such luck.
By the way, nobody should assume that a "regular" StopTech 14" ST-60 front kit will work with Gumby wheels and 1/8" spacers. The StopTech Trophy calipers have extra material removed, and some of it is in exactly the right place to help with Gumby wheel fitment.
Here is the reason I want to keep using the stock acorn wheel nuts:
Dave Zeckhausen
So, can anyone tell me the length of the stock studs and if anyone makes aftermarket studs that are 1/4" longer. (Or 6-7mm longer, if the stud market speaks metric.)
So, this works in front:
but this does not work in back unless I install longer studs:
If only the 1/8" spacers had worked in the rear, I would be such a happy camper right now! But no such luck.
By the way, nobody should assume that a "regular" StopTech 14" ST-60 front kit will work with Gumby wheels and 1/8" spacers. The StopTech Trophy calipers have extra material removed, and some of it is in exactly the right place to help with Gumby wheel fitment.
Here is the reason I want to keep using the stock acorn wheel nuts:
Dave Zeckhausen
Former Vendor
Joined: Feb 2004
Posts: 9,615
Likes: 13
From: Burlington NC
Intermediate
Joined: Sep 2009
Posts: 26
Likes: 0
From: Fairfield NJ
Thanks!
Dave Zeckhausen
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Intermediate
Joined: Sep 2009
Posts: 26
Likes: 0
From: Fairfield NJ
Confirmed that stock is M12 x 1.5mm. The dealer said the part description stated 46mm length, which is 4mm less than the 50mm I measured. So that means they must not be counting the head, which is approximately 4mm thick. But they ARE counting the unthreaded 6mm portion at the tip. Interesting.
Now I just need to find a replacement that's about 57mm long (end to end), which will work with my 1/4" thick Pfadt spacers and allow me to continue using my stock acorn nuts. I'm not sure how much extra room is under the cap of the acorn nut. It's possible a 1/2" longer bolt may work, but it's also possible the acorn nut will bottom out.
CF Senior Member
Joined: Feb 2006
Posts: 23,313
Likes: 25
From: Tucson Arizona
I recently installed AP Racing Brakes (thanks to Randy at DRM). I was using the 2.5" studs but I'm changing to the longer 3.25" studs. Others tell me as long as you have 6 or 7 full revolutions of the lug nut on the stud you're fine (which I've done for years without a problem), however, after shearing a stud trying to budge a frozen lug nut this past week I went ahead and ordered the longer studs. The longer studs may look a little funky with my street wheels but I don't drive on the street much anyway. Besides, I feel better with the lug nuts fully threaded onto the studs.
Intermediate
Joined: Sep 2009
Posts: 26
Likes: 0
From: Fairfield NJ
I recently installed AP Racing Brakes (thanks to Randy at DRM). I was using the 2.5" studs but I'm changing to the longer 3.25" studs. Others tell me as long as you have 6 or 7 full revolutions of the lug nut on the stud you're fine (which I've done for years without a problem), however, after shearing a stud trying to budge a frozen lug nut this past week I went ahead and ordered the longer studs. The longer studs may look a little funky with my street wheels but I don't drive on the street much anyway. Besides, I feel better with the lug nuts fully threaded onto the studs.
Drifting
Joined: Nov 2005
Posts: 1,745
Likes: 35
From: Turlock CA
Intermediate
Joined: Sep 2009
Posts: 26
Likes: 0
From: Fairfield NJ
I installed the longer studs in the rear and today finished up the StopTech BBK installation. Brakes are all bedded in and everything works like a champ. Here are some pictures:
1/2" longer studs installed
StopTech brakes and spacer installed
All done!
Close-up of the front BBK
Close-up of the rear BBK
The brakes feel great. I'm a happy camper. Thanks all for the help with the studs.
Dave Zeckhausen
