My 72 has 14mm Wheel studs has anyone ever seen this? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Bulldog88 · 10-31-2016, 12:35 PM

So I replaced the front rotors on my 72 and find out that the lug nuts don't work anymore because it had 14mm 1.5 thread size studs, my new rotors have 1/2 20 standard that was weird to me anyone else seen this before

Orange Crate · 10-31-2016, 01:13 PM

The Dorman catalogs are available here:

http://www.dormanproducts.com/Pages/...gs/dorman.aspx

Choose automotive hardware, scroll down to section 10 and match your old wheel studs with the correct P/N new stud. You can also remove the old studs and reuse them. I would recommend installing any stud with a press but it can be done without also.

**special-K** · 10-31-2016, 10:51 PM

You are saying your truck has had 14mm studs and lug nuts up until you replaced the rotors/ if so, someone changed all the studs to 14mm at some point. Is your truck a K/10 or K/20? 14mm is closest to 9/16",which is what K/20s had.

**Steeveedee** · 10-31-2016, 11:55 PM

At some point the rotors were replaced, and came from a year where metric was used. I used to have an '82 Regal that had one rotor with metric fasteners, and the other was the same as the rear studs, with US threads.

Mike C · 11-01-2016, 10:04 AM

What rear axle is under the truck? I would guess somebody did a rear swap to get a more highway compatible gear ratio and then swapped rotors on the front so lugs would match.

Truck doesn't have the late model 8 lug aluminum wheels does it?

Bulldog88 · 11-01-2016, 11:35 AM

What's weird is that the rotors appear to be 72 because it had the Grove going thru the rotor, I think someone changed the studs, the rear end still has a 71 72 style rear end but uses 14mm lug nuts that's weird

10-31-2016, 12:35 PM	#1
Bulldog88 Registered User Join Date: Nov 2009 Location: DFW,TX Posts: 233	My 72 has 14mm Wheel studs has anyone ever seen this? So I replaced the front rotors on my 72 and find out that the lug nuts don't work anymore because it had 14mm 1.5 thread size studs, my new rotors have 1/2 20 standard that was weird to me anyone else seen this before

10-31-2016, 01:13 PM	#2
Orange Crate Registered User Join Date: Feb 2011 Location: Under the Truck Dreaming Posts: 752	Re: My 72 has 14mm Wheel studs has anyone ever seen this? The Dorman catalogs are available here: http://www.dormanproducts.com/Pages/...gs/dorman.aspx Choose automotive hardware, scroll down to section 10 and match your old wheel studs with the correct P/N new stud. You can also remove the old studs and reuse them. I would recommend installing any stud with a press but it can be done without also. __________________ 72 K20 Custom Camper, D60, 14BFF, full roller 406 TPI w custom built ECU and yes..it has tow hooks...and a 5 speed

10-31-2016, 10:51 PM	#3
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: My 72 has 14mm Wheel studs has anyone ever seen this? You are saying your truck has had 14mm studs and lug nuts up until you replaced the rotors/ if so, someone changed all the studs to 14mm at some point. Is your truck a K/10 or K/20? 14mm is closest to 9/16",which is what K/20s had. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

10-31-2016, 11:55 PM	#4
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,677	Re: My 72 has 14mm Wheel studs has anyone ever seen this? At some point the rotors were replaced, and came from a year where metric was used. I used to have an '82 Regal that had one rotor with metric fasteners, and the other was the same as the rear studs, with US threads. __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

11-01-2016, 10:04 AM	#5
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,727	Re: My 72 has 14mm Wheel studs has anyone ever seen this? What rear axle is under the truck? I would guess somebody did a rear swap to get a more highway compatible gear ratio and then swapped rotors on the front so lugs would match. Truck doesn't have the late model 8 lug aluminum wheels does it? __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

11-01-2016, 11:35 AM	#6
Bulldog88 Registered User Join Date: Nov 2009 Location: DFW,TX Posts: 233	Re: My 72 has 14mm Wheel studs has anyone ever seen this? What's weird is that the rotors appear to be 72 because it had the Grove going thru the rotor, I think someone changed the studs, the rear end still has a 71 72 style rear end but uses 14mm lug nuts that's weird



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