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Old 09-17-2018, 02:18 PM   #1
Mr_Rich
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S-10/ Blazer rear rotors

Does anyone have the dimensions on the rear rotors for the late '90's Blazers? I have a set of rotors that were part of a Baer Brakes kit for a full-size truck that they put together. Yeah, I know, two different vehicles, but supposedly this kit was put together with those particular rotors and I want to verify that fact. I used a different kit on my K1500 and I've had this one on the shelf. It's time to sell the parts and I need to identify them. (These were five lug rotors also...)
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1989 K1500 Chev. EC
Original owner; some of the aftermarket parts I've installed are Borla headers, Hypertech chip, Edelbrock water pump, and a Stillen rear disc brake conversion kit.
2009 Hummer H3T 3.7L 5M.
1997 K2500 Chev. EC 7.4L/ 4L80E
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Old 09-17-2018, 09:35 PM   #2
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Re: S-10/ Blazer rear rotors

I took pics of these rotors I have. They are 11 5/8" or 295mm in dia. Thickness is 20mm and the height of the hat is 60mm. Depth of the hat is 54mm. The lug holes were drilled by Baer.
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1989 K1500 Chev. EC
Original owner; some of the aftermarket parts I've installed are Borla headers, Hypertech chip, Edelbrock water pump, and a Stillen rear disc brake conversion kit.
2009 Hummer H3T 3.7L 5M.
1997 K2500 Chev. EC 7.4L/ 4L80E
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Old 09-17-2018, 09:38 PM   #3
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Re: S-10/ Blazer rear rotors

These may also fit '94-'96 Chevrolet Impalas (?).
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1989 K1500 Chev. EC
Original owner; some of the aftermarket parts I've installed are Borla headers, Hypertech chip, Edelbrock water pump, and a Stillen rear disc brake conversion kit.
2009 Hummer H3T 3.7L 5M.
1997 K2500 Chev. EC 7.4L/ 4L80E
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Old 09-19-2018, 08:46 AM   #4
95 S_Trucker
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Re: S-10/ Blazer rear rotors

Disc brakes came out in 98 for the blazer. 97 and earlier were drum.

98-05 2wd rear rotor: 296mm diameter, 20,mm thick, 72.8mm total height(so the hat would be 62.8mm tall)

98-05 4wd rear rotor: 295 mm diameter, 20mm thick, 95.3 mm total height(so the hat would be 75.3 mm tall)

From the measurements you gave, they are close, but not a direct fit for a blazer.




94-96 Impala SS rear rotor: 295mm diameter, 20mm thick, 59.1 total height(so the hat would be 39.1mm)

That's not a direct fit either
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Old 09-19-2018, 12:47 PM   #5
Mr_Rich
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Re: S-10/ Blazer rear rotors

Quote:
Originally Posted by 95 S_Trucker View Post
Disc brakes came out in 98 for the blazer. 97 and earlier were drum.

98-05 2wd rear rotor: 296mm diameter, 20,mm thick, 72.8mm total height(so the hat would be 62.8mm tall)

98-05 4wd rear rotor: 295 mm diameter, 20mm thick, 95.3 mm total height(so the hat would be 75.3 mm tall)

From the measurements you gave, they are close, but not a direct fit for a blazer.




94-96 Impala SS rear rotor: 295mm diameter, 20mm thick, 59.1 total height(so the hat would be 39.1mm)

That's not a direct fit either

Thanks for that info. I think I "ballparked" that height measurement and I need to take that measurement again on a flat surface with my digital caliper.
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1989 K1500 Chev. EC
Original owner; some of the aftermarket parts I've installed are Borla headers, Hypertech chip, Edelbrock water pump, and a Stillen rear disc brake conversion kit.
2009 Hummer H3T 3.7L 5M.
1997 K2500 Chev. EC 7.4L/ 4L80E
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Old 09-20-2018, 04:18 AM   #6
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Re: S-10/ Blazer rear rotors

I think these are Impala rear disk rotors. Total height is approx. 60mm and thickness of the rotor is 20mm (39.1mm + 20mm). That math is close enough for me.
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1989 K1500 Chev. EC
Original owner; some of the aftermarket parts I've installed are Borla headers, Hypertech chip, Edelbrock water pump, and a Stillen rear disc brake conversion kit.
2009 Hummer H3T 3.7L 5M.
1997 K2500 Chev. EC 7.4L/ 4L80E
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