mini brake data

When working on your brakes, ensure that the brake pads, shoes and hydraulic cylinders used match the specifications given below.

Over the years, many changes were made to Mini brake configurations. The manufacturers tinkered with the master cylinders and rear brake balance valve, and rear shoes and cylinders on many occassions, and did not necessarily write these changes into the official service manuals. As specific data on change points is found it will be added to this page.

Hydraulic system layout diagrams will be added as time permits.

All disc-brake hubs are compatible with all disc-brake configurations, and both types of drum brakes share the same hubs.

Mini Mk1, pre-1964 (to Chassis Nos. 296256 and 638878)

Mini 1964-1985, except: Cooper and Cooper S, 1275GT 1974-on and Moke Californian

Mini Cooper 997 and 998cc

Cooper 997cc calipers from C-A2S7 382832 (RHD)/C-A2S7 382843 (LHD) and K-A2S4 382183 (RHD)/K-A2S4 379926, March 1963, were redesigned and use different brake pads; these calipers and pads are not interchangeable. Also at this time an uprated (330 psi) rear brake pressure limiter, and improved master cylinder, brake shoes, brake backplates and rear wheel cylinders were fitted, though no details have yet been found. The later calipers are often referred to as "Cooper 998cc" or "Cooper Mk2" type, despite being fitted to some 997cc Coopers.

Mini Cooper S Mk1-3,1275GT to 1974, Innocenti Cooper 998 and 1300

Mini 1275GT 1974-on, all Minis 1985-on, Moke Californian

Mini ERA Turbo

I am presently trying to find specific details. The ERA Turbo was fitted with the Metro vented 4-pot 8.4 inch front disc setup, possibly on Mini hubs. The hydraulic system was redesigned to make use of the dual fluid connections on the Metro calipers.