Will 15x8s clear disk brakes? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

joecaruso · 05-09-2017, 07:15 PM

I am currently looking at this conversion kit for my 70 c10. https://www.summitracing.com/parts/ssb-a126-71
Right now my truck has 15x8 steelies on it and was wondering if anyone has any experience with fitment with this type of disk brake. The description says it will not work with stock wheels but the stock wheels I took off my truck were 15x5.5 so I am unsure it the wider wheel would fit. I appreciate any help.

webfoot · 05-09-2017, 07:18 PM

Got pics of the inside of your wheels?

Most of the old stamped wheels are for drum brakes and will not work, the ones welded to the center section are later wheels made for disc brake clearance.

**jocko** · 05-09-2017, 08:17 PM

Do you know year or vehicle your steelies came from? If they are from a 71 or newer K10, then they should clear stock disk brake calipers. In 71, C10 wheels became 5 lug, so ya gotta be careful grabbing 6 luggers without knowing the lineage. This kit is 11.5" dia disks - factory 5 luggers are approx. 11.8", so this could be a good choice. The interference that a pre-71 6 lug wheel causes is because of the taper on the inside of the wheel disk - it's angled in and can rub a caliper.

chewychevy67 · 05-10-2017, 12:31 AM

I think what they mean is your drum brake wheels won't work. It states minimum wheel size is 15". Looks sweet. I might do this as well. Anyone know what calipers and pads this kit uses?

**68bowtie** · 05-10-2017, 12:59 AM

i have 15x8 w/ 4.25" bs with mcgaughy classic drop spindles. the tie rod arm of the spindle hit the wheel weights so i had to do a little trimming. otherwise no issues.

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67ChevyRedneck · 05-10-2017, 09:45 AM

Quote:

Originally Posted by chewychevy67

I think what they mean is your drum brake wheels won't work. It states minimum wheel size is 15". Looks sweet. I might do this as well. Anyone know what calipers and pads this kit uses?

Wow, not a fan of that rotor. That looks like a lot of slop around the lugs and it doesn't look to fit snug over the hub either??

**special-K** · 05-10-2017, 09:49 AM

Yes, 15 x 8 wheels clear factory disc brakes. Only early wheels from drum brakes won't. Those would be from 1970 or older.

**raggedjim** · 05-10-2017, 10:49 AM

Do your wheels have 3 nubs or 4 nubs? The 4 nub 8" will fit over discs, the 3 nub 8" will not.

I have to add, this is true for stock '71 up calipers and spindles, not sure about this kit...

Rg

GASoline71 · 05-10-2017, 10:59 AM

I have 15x8 ET slot mags on the front of my 1972 GMC C15 with stock front disc brakes. They fit just fine.

Gary

demian5 · 05-10-2017, 12:08 PM

Hmmm - like the impala adapters, I wonder if the scarebird c10 adapters are designed to clear factory steel wheels.

Pushrodjr · 05-10-2017, 12:11 PM

I would image you shouldn't have a problem. I did the same from CPP but I am running 15x10 upfront. I did have to use a little wheel space to clear the tie rod end and grind some on steering knuckle. I doubt you would run into the same problem I did.

http://67-72chevytrucks.com/vboard/s...d.php?t=737562

webfoot · 05-10-2017, 12:31 PM

Quote:

Originally Posted by demian5

Hmmm - like the impala adapters, I wonder if the scarebird c10 adapters are designed to clear factory steel wheels.

If it is a disc wheel then yes!

joecaruso · 05-10-2017, 04:20 PM

Thanks all for the replys. I check and my wheels appear to be the later welded style. I went forward with ordering the kit so we will see how the install goes.

chewychevy67 · 05-10-2017, 04:29 PM

Quote:

Originally Posted by joecaruso

Thanks all for the replys. I check and my wheels appear to be the later welded style. I went forward with ordering the kit so we will see how the install goes.

Please post back a review of the product as I am thinking about a purchase too and will be waiting for info. Thx.

FL71C10 · 05-26-2017, 01:19 PM

Since you guys are on the subject, do you think a 16" six lug wheel from a 68 would work on disc brakes?

I'm planning on running the CPP 6 lug disc conversion rotors with 71 calipers.

Thanks.

05-09-2017, 07:15 PM	#1
joecaruso Registered User Join Date: Sep 2014 Location: Gloucester Massachusetts Posts: 72	Will 15x8s clear disk brakes? I am currently looking at this conversion kit for my 70 c10. https://www.summitracing.com/parts/ssb-a126-71 Right now my truck has 15x8 steelies on it and was wondering if anyone has any experience with fitment with this type of disk brake. The description says it will not work with stock wheels but the stock wheels I took off my truck were 15x5.5 so I am unsure it the wider wheel would fit. I appreciate any help.

05-09-2017, 07:18 PM	#2
webfoot Registered User Join Date: Nov 2007 Location: Hermiston, OR Posts: 947	Re: Will 15x8s clear disk brakes? Got pics of the inside of your wheels? Most of the old stamped wheels are for drum brakes and will not work, the ones welded to the center section are later wheels made for disc brake clearance. __________________ *Running in place gets you nowhere fast.* -me 1968 GTO 4-spd covnvertible 1970 K-20 4-speed, factory AC.

05-09-2017, 08:17 PM	#3
jocko Senior Member Join Date: Oct 2009 Location: Godley, TX Posts: 17,934	Re: Will 15x8s clear disk brakes? Do you know year or vehicle your steelies came from? If they are from a 71 or newer K10, then they should clear stock disk brake calipers. In 71, C10 wheels became 5 lug, so ya gotta be careful grabbing 6 luggers without knowing the lineage. This kit is 11.5" dia disks - factory 5 luggers are approx. 11.8", so this could be a good choice. The interference that a pre-71 6 lug wheel causes is because of the taper on the inside of the wheel disk - it's angled in and can rub a caliper. Last edited by jocko; 05-09-2017 at 08:38 PM.

05-10-2017, 12:31 AM	#4
chewychevy67 Registered User Join Date: Jan 2010 Location: Here Posts: 5,413	Re: Will 15x8s clear disk brakes? I think what they mean is your drum brake wheels won't work. It states minimum wheel size is 15". Looks sweet. I might do this as well. Anyone know what calipers and pads this kit uses? Attached Images

05-10-2017, 12:59 AM	#5
68bowtie Senior Member Join Date: Jan 2007 Location: Turlock, CA Posts: 8,343	Re: Will 15x8s clear disk brakes? i have 15x8 w/ 4.25" bs with mcgaughy classic drop spindles. the tie rod arm of the spindle hit the wheel weights so i had to do a little trimming. otherwise no issues. __________________ I live in California, but identify as a Texan "If a job's worth doing, it's worth doing well" Project "Little Sister" (70 c10 blue original paint refresh) Project "C10 Fever" (68 factory black 396 swb) Project "Blue Bomb" (70 c30 blue original paint refresh) Project "Vitamin C" (71 c10 orange original paint refresh)

05-10-2017, 09:49 AM	#7
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,863	Re: Will 15x8s clear disk brakes? Yes, 15 x 8 wheels clear factory disc brakes. Only early wheels from drum brakes won't. Those would be from 1970 or older. __________________ "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 ~

05-10-2017, 10:49 AM	#8
raggedjim Senior Member Join Date: Jun 2002 Location: Murray, Kentucky Posts: 3,373	Re: Will 15x8s clear disk brakes? Do your wheels have 3 nubs or 4 nubs? The 4 nub 8" will fit over discs, the 3 nub 8" will not. I have to add, this is true for stock '71 up calipers and spindles, not sure about this kit... Rg __________________ Roger '68 Short step - https://67-72chevytrucks.com/vboard/...d.php?t=849675 '69 ('70?) 2wd Blazer '70 GMC Jimmy 2wd

05-10-2017, 12:08 PM	#10
demian5 Registered User Join Date: Aug 2016 Location: Lake Forest, CA Posts: 2,177	Re: Will 15x8s clear disk brakes? Hmmm - like the impala adapters, I wonder if the scarebird c10 adapters are designed to clear factory steel wheels. __________________ "Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC

05-10-2017, 12:11 PM	#11
Pushrodjr Registered User Join Date: May 2017 Location: London, Kentucky Posts: 9	Re: Will 15x8s clear disk brakes? I would image you shouldn't have a problem. I did the same from CPP but I am running 15x10 upfront. I did have to use a little wheel space to clear the tie rod end and grind some on steering knuckle. I doubt you would run into the same problem I did. http://67-72chevytrucks.com/vboard/s...d.php?t=737562 Last edited by Pushrodjr; 05-10-2017 at 12:35 PM.

05-10-2017, 04:20 PM	#13
joecaruso Registered User Join Date: Sep 2014 Location: Gloucester Massachusetts Posts: 72	Re: Will 15x8s clear disk brakes? Thanks all for the replys. I check and my wheels appear to be the later welded style. I went forward with ordering the kit so we will see how the install goes.

05-26-2017, 01:19 PM	#15
FL71C10 Registered User Join Date: Jun 2010 Location: Orlando, Florida Posts: 2,506	Re: Will 15x8s clear disk brakes? Since you guys are on the subject, do you think a 16" six lug wheel from a 68 would work on disc brakes? I'm planning on running the CPP 6 lug disc conversion rotors with 71 calipers. Thanks. __________________ 71 Chevy C10 Shortbed Stepside. LT1 with 4l60E. Just got back from painter, in assembly now.



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