RIDEX Rear Brake Discs Pair – MX-5 Mk1 NA 1.8 / Mk2 NB Standard Brakes • 82B0408

RIDEX Rear Brake Discs Pair – 82B0408

Replacement solid rear brake discs for Mazda MX-5 Mk1 / NA 1.8 and Mk2 / NB / NB-FL 1.6 and 1.8 petrol models (1994–2005) equipped with the corresponding standard 250mm rear braking system. Supplied as a complete pair for both rear wheels.

RIDEX 82B0408 rear brake discs provide replacement braking surfaces for the rear axle, helping restore the braking system's performance when the original discs have become worn, damaged or excessively corroded.

Brake discs are essential components of the vehicle's hydraulic braking system. When the brake pedal is pressed, the rear brake calipers apply the brake pads against the rotating discs, generating friction to reduce wheel speed and help bring the vehicle to a controlled stop.

During normal driving, brake discs are subjected to repeated heating and cooling, frictional wear, moisture and road contamination. Over time, the braking surfaces can become worn, scored, corroded or uneven.

Excessively worn or damaged discs may contribute to braking noise, vibration, reduced friction contact and deterioration in overall braking performance.

These RIDEX discs feature a solid cast-iron construction with a nominal diameter of 250mm and a thickness of 9mm. Their design corresponds to the standard rear braking system used on compatible Mazda MX-5 NA and NB models.

Each disc has a 55mm centre bore, 34.5mm overall height and 4 × 100mm wheel stud pattern, matching the corresponding Mazda rear hub and brake assembly.

The cast-iron braking surfaces provide the friction interface required for consistent operation with compatible rear brake pads.

Replacing rear brake discs in pairs helps maintain balanced braking characteristics across the axle and ensures that both rear wheels receive matching replacement components.

For the best servicing results, worn rear brake pads should be replaced at the same time as the discs, allowing fresh friction surfaces to bed in together.

This pair of RIDEX rear discs is suitable for Mazda MX-5 Mk1 1.8 and Mk2 / Mk2.5 1.6 and 1.8 vehicles equipped with the standard rear disc braking system.

Key Features & Benefits

• Replacement solid rear brake disc pair
• Suitable for Mazda MX-5 Mk1 / NA 1.8 and selected Mk2 / NB / NB-FL 1.6 and 1.8 models
• Designed for the standard 250mm rear braking system
• Durable cast-iron construction
• 250mm nominal disc diameter
• 9mm nominal disc thickness
• 8mm minimum permitted disc thickness
• 55mm centre bore
• 4 × 100mm wheel mounting pattern
• Uncoated brake disc surfaces
• Supplied as a matching pair for both rear wheels
• Suitable for routine brake servicing and replacement of worn rear discs

Product Specifications

• Product type: Rear brake disc pair
• Fitting position: Rear axle, left and right
• Brake disc design: Solid
• Material: Cast iron
• Diameter: 250mm
• Nominal thickness: 9mm
• Minimum thickness: 8mm
• Overall height: 34.5mm
• Centre bore: 55mm
• Pitch circle diameter: 100mm
• Wheel stud pattern: 4 × 100mm
• Mounting hole arrangement: 4/7
• Wheel bolt bore diameter: 13.1mm
• Surface finish: Uncoated
• Disc construction: Plain / non-drilled
• Vehicle application: Mazda MX-5 NA 1.8 and NB / NB-FL standard rear brakes
• Quantity supplied: 2 rear brake discs
• Condition: New
• Brand: RIDEX
• Manufacturer Part Number: 82B0408
• EAN: 4059191125593

Fitment Advice: Suitable for the standard 250mm rear disc braking system fitted to Mazda MX-5 Mk1 / NA 1.8 and selected Mk2 / NB and Mk2.5 / NB-FL 1.6 and 1.8 models. Early Mk1 1.6 vehicles use smaller rear brake discs, while Mk2.5 Sport models fitted with the larger brake package require a different rear disc. Vehicles with replacement or upgraded brake systems should use discs corresponding to the fitted calipers and brake configuration.

Signs of Worn Brake Discs: Scored or uneven braking surfaces, excessive corrosion, a pronounced wear lip, brake judder, unusual noise during braking or disc thickness below the specified minimum of 8mm.

Other Items to Consider: Rear brake pads, caliper slider pins, brake pad fitting hardware, brake caliper servicing components, brake fluid and brake cleaning products.

Useful Tools / Consumables: Vehicle lifting equipment, axle stands, wheel nut socket, brake caliper tools, socket and spanner set, calibrated torque wrench, brake cleaner, wire brush or suitable hub cleaning equipment and appropriate brake assembly lubricant.

Difficulty Guide: Moderate. Replacement requires removal of the rear wheels and brake calipers, inspection and cleaning of the rear hub mounting surfaces, fitting the replacement discs and correctly reassembling the rear braking system.

Why RIDEX? RIDEX supplies aftermarket braking and vehicle servicing components designed for routine maintenance and replacement of worn parts. The 82B0408 rear brake discs provide a practical replacement solution for the corresponding standard rear braking system fitted to Mazda MX-5 NA and NB models.

What's in the Box: 2x RIDEX 82B0408 Solid Rear Brake Discs, supplied as a matching pair for both rear wheels.

Installation / Service Notes: Follow the applicable Mazda rear brake servicing procedure. Safely raise and support the vehicle before removing the rear wheels. Release the parking brake and remove the rear brake calipers, supporting them without placing strain on the flexible brake hoses. Remove the original brake discs and inspect the rear hub faces, caliper mountings and associated braking components for damage or corrosion. Thoroughly clean the hub mounting surfaces to ensure the replacement discs seat correctly. Remove any protective manufacturing residue from the new disc friction surfaces using suitable brake cleaner. Fit the replacement RIDEX discs, ensuring that they sit flush against the hubs. Inspect the existing brake pads and replace them if worn, contaminated or unsuitable for reuse. Refit the calipers and associated hardware using the specified tightening torques. Check that the brake discs rotate correctly and that the pads and parking brake mechanisms operate as intended. Refit the wheels and tighten the wheel nuts to the specified torque. Restore normal brake pedal operation before moving the vehicle, then carry out a controlled road test and bed in the braking components according to the applicable manufacturer recommendations.