Following the great furore experienced by the first generation of four pot alloy calipers, we have not been idle.  To meet the demand, greater manufacturing control was needed, necessitating in the production of new moulds.  This gave us a chance to further improve the design, and widen the range of fitments to include the 12” and 13” wheeled cars, using the full 8.4” diameter discs for both solid (latest Mini) and vented discs.  This means that the Mini Spares caliper will fit:- 10” wheels with the 7½” S disc, machined down 8.4” solid disc, even if a vented disc is the owners choice.

A broad variety of options that minimise outlay to install are possible, as the alloy calipers can be supplied to bolt directly to the swivel hub to cover all these set-ups.  There is a direct replacement for the original S/1275GT set up which can also be used on the later disc and the drive flange assembly with only the disc diameter to be reduced.  Purchasing the relevant spacer kit allows this same caliper to be used when the Metro drive flange and disc are used, again with a reduction in the disc diameter.  It is worth mentioning here that should the Metro disc and drive flange be used, the wheel locating lugs in the centre of the drive flange should be machined off. Not all wheels will clear them.  These will fit almost ALL 10” wheels.  Another caliper can be supplied to fit as direct replacement to all Mini’s using the 8.4” disc and drive flange set up as used on all new Mini’s since 1984.  Once again utilising the spacer kit will allow the Metro vented disc and drive flange to be installed.  These will fit in all 12” wheels with no other modifications.

Other improvements were to the actual castings themselves.  Using a CAD/CAM system, it was possible to reduce the weight of the caliper further by careful sculpturing the bodies, producing the minimum thicknesses commensurate with optimum strength.  Superior channelling around the pad location areas has greatly improved the dissipation of heat and of pad dust, with obvious gains in braking efficiency.  An external link pipe has been used to minimise problems when servicing the calipers, doing away with internal cross ports and their associated seals.  A problem doubled when spacers are used for vented discs.  The calipers are also symmetrical, so are universal – not handed. Imperial size bleed valves and unions are used, and the single line feed is retained to considerably ease fitting.