GiroDisc GD355.35.52 355 mm x 35 mm Replacement Rotor Rings (D52)

Application Fitment Context

• Compatible with vehicles originally equipped with GiroDisc two-piece "D52" rotor setups using 355 mm diameter, 35 mm thickness rotors
• Intended for use with existing GiroDisc rotor hats (Brembo / StopTech or other aftermarket 2-piece conversions) - NOT compatible with OEM one-piece rotors or non-GiroDisc hats

Features

• High-carbon cast-iron rotor rings - engineered for durability, high thermal capacity, and track-capable braking performance
• Slotted & vented disc surface with internal curved-vane ventilation - helps purge pad gasses, dust and debris, and improves cooling under heavy or repeated braking
• Sold as a pair (left + right) including full replacement hardware (floating-mount pins, washers, bolts) for bolt-on installation
• Floating two-piece design - allows rotor ring to expand/contract independently from the hat under heat load, reducing risk of warping and improving pad contact consistency
• Re-uses existing aluminum hats - cost-effective refresh option compared to replacing full rotor assemblies
• Precision-machined in-house - tight tolerances and balanced rings for smooth, vibration-free braking behavior
• Direct replacement for compatible GiroDisc 355 x 35 mm rotor systems - no modifications required when matched correctly
• Suitable for street, track, or performance driving - restores braking surface at end-of-life without losing performance quality

Specifications

• Part Number: GD355.35.52
• Rotor Diameter: 355 mm
• Rotor Thickness: 35 mm (nominal ring thickness)
• Material: High-carbon cast-iron rotor rings
• Rotor Type: Slotted & vented, curved-vane internally ventilated disc rings
• Mounting: Floating-mount system - includes alloy-steel drive pins / bolts / washers / clips for full re-assembly
• Sold As: Pair (front or rear set depending on original setup), includes both rotor rings + hardware kit
• Hat Requirement: Must reuse existing GiroDisc 355 x 35 mm "D52" rotor hats - hats are *not* included in kit

Included Components

• 2x Cast-iron rotor rings (left & right), 355 mm x 35 mm, slotted & vented
• Floating-mount hardware kit (drive pins / bolts, washers / spring-clip hardware) for both sides

Product Description

The GiroDisc GD355.35.52 replacement rotor-ring set is a maintenance-oriented solution for cars equipped with GiroDisc 355 mm x 35 mm two-piece rotors. Instead of replacing the entire rotor assembly once the rings wear past service limit, GD355.35.52 lets you reuse your existing aluminum hats and install fresh, high-carbon cast-iron rings - restoring optimal braking surface, heat capacity, and pad contact precision.

Each ring is slotted, vented, and internally curved-vane ventilated - a design derived from racing to maximize airflow, promote rapid heat dissipation, and purge pad gasses or debris. The included floating-mount hardware ensures the rotor ring stays centered relative to the hat, allows thermal expansion under heavy use, and reduces warping or vibration risk. Because this is a direct-bolt kit when matched to the correct hat, installation is straightforward and reversible. For owners who value performance braking, long-term serviceability, and maintenance cost-efficiency - GD355.35.52 offers a robust way to refresh your rotor setup without replacing the whole assembly.