Disc brake upgrade bearing question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Boydc10 · 06-20-2017, 06:29 PM

Trying to finish up my brake upgrade on my 64. I have a crossmember from a 85 C10. Using the stock spindles (1.25 shaft) and 6 lug rotors from cpp. My question is which bearings to use. The A5 set fit the rotor but too big on the spindle shaft. The A6 set fit he spindle shaft but too small for the rotor. Thanks for any help.

**Captainfab** · 06-20-2017, 11:35 PM

Did those spindles originally have 1" thick rotors or the 1.250" thick rotors?

chevy_mike · 06-21-2017, 10:36 AM

I agree with Captainfab, those years have two different spindles. A light duty and heavy duty. I think that started around '81 or so. Everything earlier would be the heavy duty ones and most of the companies making stuff are using the heavy duty versions.

You need to figure out what spindle you have.

Boydc10 · 06-22-2017, 09:30 PM

Thanks for the replies. I found out the donor truck had 1 inch rotors so I got some different spindles ordered. Thanks again.

06-20-2017, 06:29 PM	#1
Boydc10 Registered User Join Date: Jun 2016 Location: Fort Mill, SC Posts: 3	Disc brake upgrade bearing question Trying to finish up my brake upgrade on my 64. I have a crossmember from a 85 C10. Using the stock spindles (1.25 shaft) and 6 lug rotors from cpp. My question is which bearings to use. The A5 set fit the rotor but too big on the spindle shaft. The A6 set fit he spindle shaft but too small for the rotor. Thanks for any help.

06-20-2017, 11:35 PM	#2
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,251	Re: Disc brake upgrade bearing question Did those spindles originally have 1" thick rotors or the 1.250" thick rotors? __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

06-21-2017, 10:36 AM	#3
chevy_mike Never Ending Projects Join Date: Jul 2006 Location: San Diego, CA Posts: 3,836	Re: Disc brake upgrade bearing question I agree with Captainfab, those years have two different spindles. A light duty and heavy duty. I think that started around '81 or so. Everything earlier would be the heavy duty ones and most of the companies making stuff are using the heavy duty versions. You need to figure out what spindle you have. __________________ . 1965 C10 Panel, Tiki Express http://www.67-72chevytrucks.com/vboa...d.php?t=506580 SOLD 1968 Chevy C10, Long, Fleetside, Hot Rod Hauler http://67-72chevytrucks.com/vboard/s...d.php?t=313233 SOLD 1965 Chevy C10, Long, Fleetside, Hot Rod C10 http://67-72chevytrucks.com/vboard/s...d.php?t=415702 SOLD We were given two ears and one mouth for a reason... listen twice as much and speak half as often...

06-22-2017, 09:30 PM	#4
Boydc10 Registered User Join Date: Jun 2016 Location: Fort Mill, SC Posts: 3	Re: Disc brake upgrade bearing question Thanks for the replies. I found out the donor truck had 1 inch rotors so I got some different spindles ordered. Thanks again.



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