Rim Back space & disc brake - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ericpost · 10-19-2008, 09:15 PM

I'm planning on running 1 ton cucv axles front and rear (D60/14bff) with 38x13.50 TSL's on 15inch rims.

Anyone know what the right rim width/back space should be?

Will I have any problems with the brake calibers clearing 15" rims if I do a disc brake conversion?

Burt4x4 · 10-20-2008, 09:50 AM

I never personally ran 15" on a D60 but my buddy did and he had to grind down his front calipers a fair amount..a good grinding wheel and a six pack should do it hahhaa

As fo backspacing I hear 3.5" alot..but again never did it with 15" so....
.02c

*FormerMember* · 10-20-2008, 10:22 AM

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ericpost · 10-20-2008, 10:23 AM

Quote:

Originally Posted by Burt4x4

I never personally ran 15" on a D60 but my buddy did and he had to grind down his front calipers a fair amount..a good grinding wheel and a six pack should do it hahhaa

As fo backspacing I hear 3.5" alot..but again never did it with 15" so....
.02c

Would that be a 6 pack per side?

So for a long time 15's were the rim size to have for wheeling since the sneaker sizing was plentiful and you had lots of rubber between the nasty hidden rock and your rim. Now that 16 and 16.5 is becoming more standard (you can tell how long I've been out of this) is now a good time to go that route? I'm at the early stages of my build (picking up CUCV axles next week) and I get to pick my rim size since I only have 6 lug today.

*FormerMember* · 10-20-2008, 10:25 AM

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**Yukon Jack** · 10-20-2008, 10:34 AM

Yep, 17" are a good size, if I were looking at rims, that is likely what I would go with.

ericpost · 10-20-2008, 12:44 PM

So currently I'm up to 17" Rim with a "sort of" 3.5" back space...

*FormerMember* · 10-20-2008, 01:33 PM

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ericpost · 10-20-2008, 01:38 PM

Quote:

Originally Posted by grendel

Well, with the 17" rim you can run whatever back space you want.

What about rubbing to the inside?

*FormerMember* · 10-20-2008, 01:42 PM

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ericpost · 10-20-2008, 02:05 PM

Quote:

Originally Posted by grendel

That would be a matter of tire size.

I've had a stock hummer rim on my 1 ton. That's a 8" rim with 7" back space.

Agreed.

I'm thinking 38x12.5 (4" lift) or 39.5X13.5 (6" lift)

10-19-2008, 09:15 PM	#1
ericpost Registered User Join Date: Aug 2002 Location: New Hampshire Posts: 141	Rim Back space & disc brake I'm planning on running 1 ton cucv axles front and rear (D60/14bff) with 38x13.50 TSL's on 15inch rims. Anyone know what the right rim width/back space should be? Will I have any problems with the brake calibers clearing 15" rims if I do a disc brake conversion? __________________ 72 GMC Jimmy, 350, sm465 np205 (getting a face lift) 64 Nova SS, 327 SC & gassed, TH350. (blowed it up) 84 HD FX frame,80 FL tins, evo with 85hp/90tq (wifes bike) 96 HD FatBoy evo with 102hp/100tq (mine!) KEEP NOTHING STOCK!

10-20-2008, 09:50 AM	#2
Burt4x4 Registered User Join Date: Feb 2000 Location: Modesto, CA Posts: 1,842	Re: Rim Back space & disc brake I never personally ran 15" on a D60 but my buddy did and he had to grind down his front calipers a fair amount..a good grinding wheel and a six pack should do it hahhaa As fo backspacing I hear 3.5" alot..but again never did it with 15" so.... .02c __________________ 1972 K5 MPFI454/Sm465/Np205/D60/14FFd/Re-Centerd H1s w/Swamper Iroks

10-20-2008, 10:22 AM	#3
FormerMember Account Suspended Join Date: Feb 2004 Posts: 3,051	Re: Rim Back space & disc brake ... Last edited by FormerMember; 04-02-2009 at 04:37 PM.

10-20-2008, 10:25 AM	#5
FormerMember Account Suspended Join Date: Feb 2004 Posts: 3,051	Re: Rim Back space & disc brake ... Last edited by FormerMember; 04-02-2009 at 04:37 PM.

10-20-2008, 10:34 AM	#6
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,684	Re: Rim Back space & disc brake Yep, 17" are a good size, if I were looking at rims, that is likely what I would go with. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

10-20-2008, 12:44 PM	#7
ericpost Registered User Join Date: Aug 2002 Location: New Hampshire Posts: 141	Re: Rim Back space & disc brake So currently I'm up to 17" Rim with a "sort of" 3.5" back space... __________________ 72 GMC Jimmy, 350, sm465 np205 (getting a face lift) 64 Nova SS, 327 SC & gassed, TH350. (blowed it up) 84 HD FX frame,80 FL tins, evo with 85hp/90tq (wifes bike) 96 HD FatBoy evo with 102hp/100tq (mine!) KEEP NOTHING STOCK!

10-20-2008, 01:33 PM	#8
FormerMember Account Suspended Join Date: Feb 2004 Posts: 3,051	Re: Rim Back space & disc brake ... Last edited by FormerMember; 04-02-2009 at 04:37 PM.

10-20-2008, 01:42 PM	#10
FormerMember Account Suspended Join Date: Feb 2004 Posts: 3,051	Re: Rim Back space & disc brake ... Last edited by FormerMember; 04-02-2009 at 04:37 PM.



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