rear brakes larger than front

[YukonXL04]

Hey guys, so looking at my Yukon today and I noticed my rear brake rotors seem to be atleast 1-2" larger in diameter than my front brakes, I was under the impression it was supposed to be larger in front and equal or smaller in the rear... is everyone's else like this or the PO screw something up lol.

 

[Big Buttons]

I believe thay are the same diameter but deeper than the front because of the parking brake

 

[YukonXL04]

Yea they are definitely deeper with the parking brake, but they are atleast 1" larger diameter. It's noticeable when looking.

 

[yates ™]

Post pics of both.

 

[Ben]

^ what he said. It should not be bigger.

 

[bottomline2000]

rear brake disc are larger than the front on NBS trucks, however the front disc on NNBS are larger than the front on NBS.

 

[livingez_123]

Fronts are 305mm
Rears are 330.2mm

 

[YukonXL04]

Cool, thanks alot guys. So when I do the gmt 900 front upgrade I don't need to do the rears right? That's weird the fronts are smaller though lol

 

[livingez_123]

The only reason they had to make the rear brake rotor a bit bigger was for the emergency brake drum. if they went smaller it wouldn't be as effective.

 

[bottomline2000]

Cool, thanks alot guys. So when I do the gmt 900 front upgrade I don't need to do the rears right? That's weird the fronts are smaller though lol

Correct. Gmt900 has smaller rear rotors than gmt800


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