In Reply to: C900 brake upgrade using 9000 calipers, Landjet [Profile/Gallery] , Mon, 12 Mar 2007 20:21:52

"Thirdly, are the 9000 brakes installed on the rears as well?"

No, they're the same rear brakes on both 88+ c900s and all 9000s.

In my experience, "upgrading" to 9000 calipers is not worth the effort.

Here is some other info on 9000 brakes:


* 9000 calipers are 3.6 pounds heavier per corner -- that is, caliper and rotor. (This can vary a bit depending on which rotors you have.) This is all unsprung weight.

* 9000 calipers and Aero/Super Aero rims add 43 pounds to your car, all of it unsprung and a lot of it rotating mass.

* The heaviest 9000 rotors, by Balo and Brembo, weigh 14.95 and 14.88 pounds, respectively; meanwhile, the lightest rotors, by Zimmerman, weigh 14.5 (their kick-ass cross-drilled rotors weigh 14.0 pounds). The heaviest 900 rotors, by Brembo (which is OEM, I believe), weigh 14.2 pounds, whereas the lightest, by ATE, weigh 13.44 pounds.

* The stock donut spare tire does not fit over 9000 brakes: if you get a flat up front, you'll have to swap a good rim from the rear to the front, then put the donut on the rear.

* Installing 9000 calipers requires an adjustment to the master cylinder to compensate for the longer pedal travel. This travel is due to the larger piston size in the 9000 calipers.

* Installing 9000 calipers and rotors requires the use of washers on the caliper bolts; without them, the bolts will rub against the rotors. (900 rotors are 278mm x 23.5mm thick, while 9000 rotors are 280 x 25mm thick. If you purchased "9000" rotors that are 23.5mm thick, then you were sold 900 rotors being sold as 9000 rotors.)

Here's some more info on brakes: http://saabhippo.blogspot.com/2005/08/brakes.html


posted by 67.183.141...

• C900 brake upgrade using 9000 calipers, Landjet , Mon, 12 Mar 2007 20:21:52
  • Re: C900 brake upgrade using 9000 calipers, Hans, Mon, 12 Mar 2007 23:27:51 <-- Viewing This Message
    • Hans you make great points, snipes, Tue, 13 Mar 2007 11:06:49
    • Re: C900 brake upgrade using 9000 calipers, Justin VanAbrahams , Tue, 13 Mar 2007 11:02:50
      • Re: C900 brake upgrade using 9000 calipers, Justin VanAbrahams , Tue, 13 Mar 2007 11:22:01
  • Re: C900 brake upgrade using 9000 calipers, Justin VanAbrahams , Mon, 12 Mar 2007 20:30:16
    • Re: C900 brake upgrade using 9000 calipers, Saabu , Mon, 12 Mar 2007 21:59:02
    • Re: C900 brake upgrade using 9000 calipers, Carl, Mon, 12 Mar 2007 20:49:04
      • Thanks for the detailed responses..........., Landjet , Tue, 13 Mar 2007 11:03:12
        • Re: Thanks for the detailed responses..........., Justin VanAbrahams , Tue, 13 Mar 2007 11:24:33
          • 16 inch Aeros weigh 16 pounds..........., Landjet , Tue, 13 Mar 2007 13:25:31
            • Weight info, Hans, Tue, 13 Mar 2007 19:01:41
              • Aero 16 in wheel weight, Landjet , Wed, 14 Mar 2007 13:54:01
                • I'll have to revisit, Hans, Wed, 14 Mar 2007 22:50:08
                • wow, that's a big surprise, Brownie, Wed, 14 Mar 2007 17:54:45
                  • Re: wow, that's a big surprise, Landjet , Wed, 14 Mar 2007 18:10:05

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