new wheels question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**bigmac73** · 06-12-2020, 07:49 PM

guys,
I installed a set of American Racing AR91029050800 20" x 9" AR910 0mm Offset Chrome 4 Rims 5x127
on my 72C-10 , how do i know if i need longer wheel studs? and have any of your guys had to change the stud when upgrading to a 18 or 20 inch wheel??

gmc684x4 · 06-12-2020, 08:03 PM

Put on a open standard lug nut on 1 stud does it have full thread contact through it
Quick easy way to see

**special-K** · 06-13-2020, 07:03 AM

Why would wheel diameter make any difference? It's a matter of the material thickness at the wheel lug area. Good advice on using an open lug nut to check depth of contact

**bigmac73** · 06-13-2020, 08:53 AM

In regards to the wheel diameter, is the mounting flange looks a little thicker than the A/R 15inch wheels i took off. I will see if i can even get a standard lug nut to fit in the hole and see what type of thread protrusion i have

**bigmac73** · 06-13-2020, 10:23 AM

So i went out and put on an old stock lug nut, which is 5/8 tall(or thick) and i was less than one thread from being flush ,and i did not torque it to 90ft/lbs.

So i think that the rule of thumb that i found was the diameter of the stud should be that same measurement for total thread engagement.
I have a 1/2in diameter stud and at least 1/2 in of thread engagement i think it should be fine after i fully torque them in place

Unless someone disagrees????

**Steeveedee** · 06-13-2020, 11:47 AM

From an engineering standpoint, there should be ~three threads protruding beyond the nut threads, since the beginning threads may not have as much thread diameter.

**bigmac73** · 06-14-2020, 08:29 AM

https://www.amazon.com/dp/B01A9LGP4Y...osi&th=1&psc=1

I think i might go with these for added insurance

06-12-2020, 07:49 PM	#1
bigmac73 Senior Member Join Date: Mar 2012 Location: Chesapeake, Va Posts: 1,275	new wheels question guys, I installed a set of American Racing AR91029050800 20" x 9" AR910 0mm Offset Chrome 4 Rims 5x127 on my 72C-10 , how do i know if i need longer wheel studs? and have any of your guys had to change the stud when upgrading to a 18 or 20 inch wheel?? __________________ Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks

06-12-2020, 08:03 PM	#2
gmc684x4 Registered User Join Date: Jul 2012 Location: Whitehorse yukon Posts: 1,218	Re: new wheels question Put on a open standard lug nut on 1 stud does it have full thread contact through it Quick easy way to see

06-13-2020, 07:03 AM	#3
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: new wheels question Why would wheel diameter make any difference? It's a matter of the material thickness at the wheel lug area. Good advice on using an open lug nut to check depth of contact __________________ "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 ~

06-13-2020, 08:53 AM	#4
bigmac73 Senior Member Join Date: Mar 2012 Location: Chesapeake, Va Posts: 1,275	Re: new wheels question In regards to the wheel diameter, is the mounting flange looks a little thicker than the A/R 15inch wheels i took off. I will see if i can even get a standard lug nut to fit in the hole and see what type of thread protrusion i have __________________ Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks

06-13-2020, 10:23 AM	#5
bigmac73 Senior Member Join Date: Mar 2012 Location: Chesapeake, Va Posts: 1,275	Re: new wheels question So i went out and put on an old stock lug nut, which is 5/8 tall(or thick) and i was less than one thread from being flush ,and i did not torque it to 90ft/lbs. So i think that the rule of thumb that i found was the diameter of the stud should be that same measurement for total thread engagement. I have a 1/2in diameter stud and at least 1/2 in of thread engagement i think it should be fine after i fully torque them in place Unless someone disagrees???? __________________ Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks Last edited by bigmac73; 06-13-2020 at 10:23 AM. Reason: more info

06-13-2020, 11:47 AM	#6
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,990	Re: new wheels question From an engineering standpoint, there should be ~three threads protruding beyond the nut threads, since the beginning threads may not have as much thread diameter. __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

06-14-2020, 08:29 AM	#7
bigmac73 Senior Member Join Date: Mar 2012 Location: Chesapeake, Va Posts: 1,275	Re: new wheels question https://www.amazon.com/dp/B01A9LGP4Y...osi&th=1&psc=1 I think i might go with these for added insurance __________________ Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks



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