Is there a difference in stopping between... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Fastrucken · 10-25-2006, 10:25 AM

The 1" rotors or the heavy duty 1.25 rotors. Here is the situation... I’m upgrading to disc brakes on my 65 c-10 (we can upgrade to 73-87 brakes without modification) and about to start buying some parts and since I’m starting from scratch I thought I would ask. I seem to remember a friend of mine that had the h/d brakes that switched to the non h/d for a set of free lowering spindles and told me he noticed a big difference in stopping power. I tried a search but couldn't find the specifics on this.
Any help would be great.
Graham

**N2TRUX** · 10-25-2006, 10:37 AM

I don't think there will be a noticable difference in stopping since it is the same diameter rotor, and the caliper still using the same size piston. What will be improved is the ability for the rotor to dissapate heat without warping. If you can go either way, why not go for the HD option. When it comes to brakes, more is better...

72C203503ONTHETREE · 10-28-2006, 10:16 PM

What were the heavy duty brakes used on? I have a 73 half ton long bed. What option code should I tell the parts guy I have to get them? Can I use the non HD option brake calipers on the HD rotors?

**swervin ervin** · 10-28-2006, 10:33 PM

My 85 came stock with 1.25" rotors. It has the JB5 option code. It was an option you could get if wanted when buying the truck new. No you can't use calipers intended for 1.25" rotors on 1" rotors. You have to swap everything, spindles, rotors and calipers.

10-25-2006, 10:25 AM	#1
Fastrucken Junior Member Join Date: May 2006 Location: Peninsula, Oh Posts: 197	Is there a difference in stopping between... The 1" rotors or the heavy duty 1.25 rotors. Here is the situation... I’m upgrading to disc brakes on my 65 c-10 (we can upgrade to 73-87 brakes without modification) and about to start buying some parts and since I’m starting from scratch I thought I would ask. I seem to remember a friend of mine that had the h/d brakes that switched to the non h/d for a set of free lowering spindles and told me he noticed a big difference in stopping power. I tried a search but couldn't find the specifics on this. Any help would be great. Graham __________________ A good friend will come bail you out of jail, but a true friend will be sitting next to you saying, "That was ****ing awesome."

10-25-2006, 10:37 AM	#2
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,023	Re: Is there a difference in stopping between... I don't think there will be a noticable difference in stopping since it is the same diameter rotor, and the caliper still using the same size piston. What will be improved is the ability for the rotor to dissapate heat without warping. If you can go either way, why not go for the HD option. When it comes to brakes, more is better... __________________ Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra"

10-28-2006, 10:16 PM	#3
72C203503ONTHETREE Registered User Join Date: Apr 2004 Location: Grant, Alabama Posts: 504	Re: Is there a difference in stopping between... What were the heavy duty brakes used on? I have a 73 half ton long bed. What option code should I tell the parts guy I have to get them? Can I use the non HD option brake calipers on the HD rotors? __________________ 72 Chevy C20, SOLD (Dang it.) 09 Challanger RT six speed in all black. 74 Datsun 710 wagon, all 1.8 liters of screaming Datsun power. 73 C10 long bed, 350/350 combo, nice shape.

10-28-2006, 10:33 PM	#4
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	Re: Is there a difference in stopping between... My 85 came stock with 1.25" rotors. It has the JB5 option code. It was an option you could get if wanted when buying the truck new. No you can't use calipers intended for 1.25" rotors on 1" rotors. You have to swap everything, spindles, rotors and calipers. __________________ Mike 1985 Chevy C-10



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