Kent Auto Developments Ltd - Mini Braking Systems

Mini 4 pot billet alloy calipers:

The calipers are CNC machined from HE30 (6082) extruded billets, which has improved the caliper body stiffness over our previous sand cast caliper. Hard anodised alloy pistons are fitted with dust seals fitted with fluid feed from a single 3/8UNF fluid feed port Stainless steel bolts and bleed screws are used throughout . Weight less pads 1.26kg

Pads available in the following compounds: EBC Green (road), Mintex M1144 (road), Carbon Metallic 83 compound (race only), Ferodo DS3000 (race only)

1012000 7.9" solid disc
1012001 8.4" solid disc
1012004 7.5/7.75" solid disc
1012002 7.9" vented disc
1012003 8.4" vented disc
1012005 7.5/7.75" vented disc

Which calipers do I need?

Wheel clearance templates:

These PDF (Adobe Acrobat) files can be downloaded, printed out full size and glued to card backing. The profile can then be cut out and tried into the wheels to ascertain if there is sufficient caliper to wheel clearance

10" vented disc template

12" vented disc template

KAD Mini Brake Discs

KAD offers a range of performance brake discs for the Mini in three diameters and three face styles on solid or ventilated disc castings. For 12” and 13” wheels, standard diameter 8.4” discs are used. For most 10” wheels, 7.9” diameter solid or vented discs can be fitted and where the 10” wheel has a more restrictive inner profile, 7.75” discs and the smaller diameter 4 pot caliper can be used. Face options are plain, grooved or cross drilled and grooved. KAD brake discs should be fitted to the 12” wheel drive flanges and can be used with either the four pot or six pot calipers for 7.9” and 8.4” diameters and the four pot calipers for 7.75” discs.

1012070 KAD Mini Rear disc conversion

This has been developed in 2001 to fill the need for a lightweight rear disc brake conversion with an effective mechanical handbrake to replace the standard drum brakes at the rear. The rationale was never to increase braking effort at the rear of the car but to reduce weight. Even with alloy wheel hubs and alloy wheel cylinders, drum brakes cannot be reduced below 4.6kgs on a cost effective basis due to the weight of steel in items such as the brake shoes, mechanism and backplates.

The calipers are a single piston sliding type, fully dust sealed, machined from billet aluminium. The hubs, carrying a lightweight steel drilled disc are CNC machined from billet aluminium and accept standard Mini wheel bearings. The kits are supplied complete with all of the parts to convert from drum to disc brake and use the standard handbrake cables. The kit will fit under 10" wheels and has been designed with both road and competition usage in mind.

Weight 2.8kg (the lightest drum brake assembly weighs 4.64kgs)

Fitting instructions

KAD Adjustable bias pedal box

Horizontally mounted, fabricated pedal box which bolts to existing brake master cylinder mounting studs, facing forward into engine bay. Enables the use of independent front and rear master cylinders with a balance bar assembly to adjust front to rear bias.

Length, forwards into engine bay (to end of master cylinders) 255mm, width across 125mm, height to reservoir cap 145mm.

1012280 pedal box

1012281 2 integral reservoir master cylinders

1012282 cable adjuster

1012100 KAD Mini 6 pot calipers: Type A

The type A calipers are CNC machined from single billet of 2014A T6 aluminium alloy, the one piece design minimises caliper body deflection and the thin section bridging the disc allow bigger disc to be fitted under given wheel rim size. The calipers are radial mounting which allows one caliper version to fit discs from 7.9-8.4" diameter, widths 10-20mm. Differentially sized thin wall stainless steel pistons are used to reduce uneven wear of the brake pads

These calipers are not fitted with dust seals as they are primarily intended for race use. If used on road cars, the area around the pistons must be kept free of a build up of brake dust and road salt. Weight less pads and mountings 1.17kg

Pad compounds: EBC Green, Mintex M1144, Ferodo DS3000

1012140 KAD Mini 6 pot Big Disc kit

For 13” wheels where a no compromise front brake setup is required our big disc conversion can be used. This combines our one piece Type B 6 pot caliper with a 265x18mm vented disc with separate alloy mounting bell. This is a competition oriented brake upgrade as the calipers are not fitted with dust seals.

1019178 'K4' Caliper Kit

With the demand for more powerful brakes to be used under 13" wheels on the road we have developed the K4 Caliper. It is a hybrid between the 10.4" disc used in our Mini Big Disc 6 Pot caliper kit and the tried and tested 4 Pot caliper.

This means that the massive breaking tourque gained from the bigger disc can be combined with a caliper with dust seals fitted, giving you the best of both worlds: Making the kit ideal for road use but also suitable for the track.

The kit is supplied with calipers discs, bells and 'budget' (EBC Greenstuff) fast road pads -Pad upgrades available.

download PDF catalogue page