These GiroDisc replacement rotor rings service the exact hat, diameter, thickness, annulus, and mounting interface identified below. Similar-looking rings are not interchangeable, so every dimension and the required hat system must be confirmed before ordering.

Key Features

• Replacement friction rings for the specified hat system
• Directional ring geometry and dimensions are part-number specific
• Replacement hardware is included only when stated for this exact part
• Existing hats are reused only when the manufacturer identifies them as compatible

Fitment

Specifications

What’s Included

The replacement ring set and only the mounting hardware GiroDisc states is supplied for this exact part number

About GiroDisc

GiroDisc designs and manufactures serviceable two-piece brake rotors, replacement rings, and related brake components in Bellingham, Washington. Selection remains exact-part-number and brake-configuration specific.

Related GiroDisc Products

• GiroDisc 2021+ BMW M2/M3/M4 G8X 370mm Slotted Rear Rotors
• GiroDisc 2021+ BMW M2/M3/M4 (G8X Excl CCM) Slotted Front Rings
• GiroDisc 2021+ BMW M2/M3/M4 (G8X Excl CCM) Slotted Front Rotors

Browse the GiroDisc collection for related brake components.

Frequently Asked Questions

Will this fit my 2023-2026 BMW M2?
That year, make, and model range is listed, but the exact trim, axle position, rotor dimensions, caliper, brake package, and every application note must also match.

Will these rings fit factory or another brand’,s hats?
Do not assume so. Most GiroDisc replacement rings are designed only for the specified GiroDisc hats unless the listing explicitly identifies a factory, Brembo, StopTech, or PFC interface.

Should the old mounting hardware be reused?
Use only the hardware method GiroDisc specifies for this exact ring. Some kits include new hardware, while factory-hat applications may require reuse or separately sourced hardware.

Installation Instructions

Replacement-ring service involves safety-critical brake hardware. Follow the current GiroDisc assembly instructions, confirm the exact hat interface and ring direction, use only approved hardware, torque fasteners in the required sequence, check runout and clearance, and complete the specified bedding process.