15mm: Stock 2002’s use a 15mm bore wheel cylinder for the rear brakes. Does not fit E21.
17mm: Stock replacement 17mm wheel cylinder for Tii’s. You can also use these on a standard 2002 for a little more rear bias using the stock 230mm drums. Does not fit E21.
19mm: These 19mm wheel cylinders are stock replacement for E21 320i USA 250mm rear brakes. These are also used as replacement cylinders for our 250mm rear drum brake upgrade kit for the 2002. These wheel cylinders are commonly used for racing vehicles using stock 230mm rear brakes in combination with a brake bias valve, but require slight modification of the 230mm brake backing plates.
22mm: We have 22mm bore wheel cylinders. We use these to get maximum rear braking on our race cars. You must install a bias valve to control front/rear brake balance and prevent rear wheel lockup. (You must select your backing plate type.) Installation Note: These are not a direct fit, you will need to open up the hole on the backing plate and drill a couple new mounting holes. This applies for the 2002 and E21 backing plates.