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07-08-2025, 12:28 PM
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#1 |
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Registered User
Join Date: May 2016
Location: northern CA
Posts: 26
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Front Disc Brake Question-are these the original rotors?
I'm the second owner of a 1971 C10. Both front rotors have this deep groove in the center (the brakes work fine, no noise, grabbing etc). I don't think the previous owner ever changed them (there is only 55 K miles on the truck). Does anyone know if the original rotors came with this groove in them?
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07-08-2025, 02:27 PM
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#2 |
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Senior Member
 
Join Date: Jul 2011
Location: Florence, MS.
Posts: 246
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Re: Front Disc Brake Question-are these the original rotors?
I've got original rotors just like that. I'd say they are originals.
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07-08-2025, 02:38 PM
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#3 |
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Registered User
Join Date: Oct 2016
Location: Dallas Texas
Posts: 3,850
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Re: Front Disc Brake Question-are these the original rotors?
.
Indeed, I too have a set with the groove in the middle. No doubt those things are better than what you buy new today if they're still thick enough. -Kevin
__________________
67 C10 fleet fuel injected '70 402, 700r4, 3.73 posi 07 335 sport turbo 6sp 94 Trans Am GT LT1 6sp posi -- sold after 22yrs 99 540 sport V8 6sp -- sold 73 240z L24 4sp -- given to friend 68 C10 step 350/350 3.73 open -- sold |
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07-08-2025, 02:44 PM
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#4 |
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Registered User
Join Date: Sep 2011
Location: Ark City, Kansas
Posts: 3,551
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Re: Front Disc Brake Question-are these the original rotors?
Another yes.
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07-08-2025, 02:53 PM
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#5 |
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Ram-A-Lam-A-Ding-Dong
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 11,903
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Re: Front Disc Brake Question-are these the original rotors?
Right, and iirc, that groove's bottom is the discard thickness.
__________________
~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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07-08-2025, 04:38 PM
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#6 |
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Registered User
Join Date: Dec 2005
Location: Kalifornia
Posts: 447
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Re: Front Disc Brake Question-are these the original rotors?
Same here. Original
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07-09-2025, 04:26 PM
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#7 |
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Registered User
Join Date: Nov 2024
Location: Henderson, NV
Posts: 25
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Re: Front Disc Brake Question-are these the original rotors?
Mine are like that on my '72. OG.
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07-09-2025, 09:29 PM
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#8 |
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Registered User
Join Date: May 2016
Location: northern CA
Posts: 26
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Re: Front Disc Brake Question-are these the original rotors?
Thank you all for replying... saved me from a brake job!
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07-10-2025, 10:23 AM
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#9 |
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Ram-A-Lam-A-Ding-Dong
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 11,903
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Re: Front Disc Brake Question-are these the original rotors?
FWIW, if there was a scratch running around a rotor and the rest of it was smooth, I wouldn't recommend a new rotor to a customer. The minimal "loss of performance" would go away once the pad wore into the groove. These weren't racers, just people driving their cars for daily needs.
__________________
~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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