wheel swap question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

doowopper · 07-10-2024, 01:09 AM

Kinda thinking out loud. I have a '69 C20 (8 hole wheels). If I were to put disc brakes on the front do you reckon that '74 wheels would fit properly?
Thanks in advance.

**67 twins** · 07-10-2024, 01:14 AM

Yes

**1970cstblazer** · 07-10-2024, 11:17 AM

The 3/4-1 ton wheel pattern didn't change until 2011 for the GM trucks

**chevmn** · 07-10-2024, 01:59 PM

One option I took was to go with 16x7 ford accuride wheels. Opens up a much better selection of tires.

**Stocker** · 07-10-2024, 04:27 PM

Quote:

Originally Posted by chevmn

One option I took was to go with 16x7 ford accuride wheels. Opens up a much better selection of tires.

Yep -- same.

doowopper · 07-10-2024, 04:53 PM

Thanks for the replies. I should have been a little clearer. I know the holes will line up. I'm concerned about any interference between the wheel and disc brakes. Again, thanks.

**Stocker** · 07-10-2024, 05:26 PM

Quote:

Originally Posted by doowopper

Thanks for the replies. I should have been a little clearer. I know the holes will line up. I'm concerned about any interference between the wheel and disc brakes. Again, thanks.

I think any (most? all?) 16" or larger-diameter wheel will clear disc brake calipers without any interference.

You don't say what size the '74 wheels are, but they were designed to work with disc brakes. You'll be okay.

Side note: Many years ago I bought a set of 15x8 wheels for my '72 K20. Had to do just a very minor bit of grinding on the calipers for them to fit.

**chevmn** · 07-10-2024, 09:05 PM

No issues with disc brakes on the Ford accuride wheels I run, and they originally came from an early 90s 3/4 4x4 with disks. I looked long and hard for an aftermarket wheel, and I could not find a newer 8 lug wheel that looked decent (to me). I do like some of the old slotted mag wheels, but very tough to find.

**mr48chev** · 07-10-2024, 10:03 PM

I have to go along with Chevmn in that you want 16 inch wheels rather than 16.5.

Decent 16.5 tires are getting hard to find and expensive when you find them.

doowopper · 07-11-2024, 02:22 AM

Yup, they're 16". The stock rims are 16.5 and I agree, tires are hard to find.

07-10-2024, 01:09 AM	#1
doowopper Registered User Join Date: Nov 2020 Location: socal Posts: 62	wheel swap question Kinda thinking out loud. I have a '69 C20 (8 hole wheels). If I were to put disc brakes on the front do you reckon that '74 wheels would fit properly? Thanks in advance.

07-10-2024, 01:14 AM	#2
67 twins Senior Member Join Date: Mar 2019 Location: Herculaneum MO (20 minutes south of St. Louis Posts: 641	Re: wheel swap question Yes __________________ 67 C10 283 T5 swapped longbed fleetside = wife's daily driver 67 C20 292 (originally a 250)4speed longbed fleetside w/original wooden bed=my project truck 67 C10 283+.060 (so a 292 as well)T5 swapped longbed fleetside=my DD 72 C1500 Sierra Grande 350 TH350 longbed fleetside=wife's fair weather truck Can you tell we are fans of longbed fleetsides & 67s Chris

07-10-2024, 11:17 AM	#3
1970cstblazer All stock and staying that way Join Date: Jul 2003 Location: Elkland, PA Posts: 1,682	Re: wheel swap question The 3/4-1 ton wheel pattern didn't change until 2011 for the GM trucks __________________ 1970 K/5 Blazer CST 4WD, Medium Bronze, 93k ACT. miles, 350, 4 speed, rear positraction, 16.5" x 8.25" HD wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration finally getting close to completion.. 1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor... 2017 Sierra 1500 SLT 4WD, Black, 45k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2... 2019 Canyon SLT 4WD, White, 62k miles, 3.6, 8L45, 3.23 LS, 18" wheels

07-10-2024, 01:59 PM	#4
chevmn Senior Member Join Date: Dec 2017 Location: Central MO Posts: 895	Re: wheel swap question One option I took was to go with 16x7 ford accuride wheels. Opens up a much better selection of tires. Attached Images

07-10-2024, 04:53 PM	#6
doowopper Registered User Join Date: Nov 2020 Location: socal Posts: 62	Re: wheel swap question Thanks for the replies. I should have been a little clearer. I know the holes will line up. I'm concerned about any interference between the wheel and disc brakes. Again, thanks.

07-10-2024, 09:05 PM	#8
chevmn Senior Member Join Date: Dec 2017 Location: Central MO Posts: 895	Re: wheel swap question No issues with disc brakes on the Ford accuride wheels I run, and they originally came from an early 90s 3/4 4x4 with disks. I looked long and hard for an aftermarket wheel, and I could not find a newer 8 lug wheel that looked decent (to me). I do like some of the old slotted mag wheels, but very tough to find.

07-10-2024, 10:03 PM	#9
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,639	Re: wheel swap question I have to go along with Chevmn in that you want 16 inch wheels rather than 16.5. Decent 16.5 tires are getting hard to find and expensive when you find them. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.

07-11-2024, 02:22 AM	#10
doowopper Registered User Join Date: Nov 2020 Location: socal Posts: 62	Re: wheel swap question Yup, they're 16". The stock rims are 16.5 and I agree, tires are hard to find.



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