How to measure brakes for parts? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

MylilBowTie · 06-26-2007, 06:13 PM

My 84 has hd 1 1/4 brakes. But I cant find out what rpo my 86 C20 has for brakes? Its been awhile since Ive had to mess with brakes. For the front I guess it would be the whole diameter of the rotor and width. Im not sure what to measure for the rear?

I have 7001-8000 GVW Range & Brake System from my Vin # according to LMC.

PorkchopBurnside · 06-26-2007, 06:38 PM

I had the same problem....measure width of the shoes on the rear. But be very accurate b/c the differences in the three different rear brakes were very minute. The 11" brakes have 2" wide shoes, 11-5/32" brakes have 2-3/4" wide shoes and the 13" brakes have 2-1/2" wide shoes. Hope this helps

06-26-2007, 06:13 PM	#1
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	How to measure brakes for parts? My 84 has hd 1 1/4 brakes. But I cant find out what rpo my 86 C20 has for brakes? Its been awhile since Ive had to mess with brakes. For the front I guess it would be the whole diameter of the rotor and width. Im not sure what to measure for the rear? I have 7001-8000 GVW Range & Brake System from my Vin # according to LMC. __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI

06-26-2007, 06:38 PM	#2
PorkchopBurnside Registered User Join Date: Apr 2007 Location: Huntington, WV Posts: 10	Re: How to measure brakes for parts? I had the same problem....measure width of the shoes on the rear. But be very accurate b/c the differences in the three different rear brakes were very minute. The 11" brakes have 2" wide shoes, 11-5/32" brakes have 2-3/4" wide shoes and the 13" brakes have 2-1/2" wide shoes. Hope this helps

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