DBA DBA52386.1S Series slotted Brake Disc Ring - 5000 T3

The DBA DBA52386.1S is a 5000 Series T3 slotted replacement brake disc ring designed for use in two-piece composite rotor assemblies. This is the replacement outer ring only, allowing drivers to swap out a worn friction ring while retaining their existing DBA 5000 Series aluminum hat — an economical and performance-smart upgrade solution.

Built on the same platform as the highly regarded 4000 Series, the 5000 Series takes performance a step further with a two-piece composite construction featuring a high-carbon cast iron rotor ring paired with an aerospace-grade T6061-T6 aluminum hat, secured by National Aerospace Standards (NAS) bolts and crimp nuts. The aluminum hat reduces unsprung weight, allows uniform radial disc expansion through the cast iron ring, and minimizes heat transfer from the disc to the wheel hub.

T3 Slotting Technology: DBA's patented T3 bi-directional slot design features symmetrical slots that facilitate the evacuation of friction dust and gases from the pad-to-rotor interface, delivering a quieter, more responsive brake pedal feel. The symmetrical pattern also allows universal left/right fitment.

Thermal Stability Profiling (TSP): All DBA 5000 Series rings undergo DBA's proprietary TSP heat treatment process, where XG-150 grey iron is subjected to controlled, prolonged heat cycles to relieve internal manufacturing stresses. This results in improved thermal stability, reduced metal fatigue, and better resistance to surface cracking during heavy or sustained braking.

CBN Machine Finish: The friction surface is finished using Cubic Boron Nitride (CBN) precision turning, which minimizes disc thickness variation (DTV) and reduces the potential for pad knock and premature wear.

Key Features:

• Replacement outer disc ring for DBA 5000 Series two-piece rotor assemblies
• High-carbon cast iron construction with T3 bi-directional slot pattern
• Symmetrical slotting for universal left/right installation
• Slots evacuate friction dust and gases for improved pedal response
• Thermal Stability Profiling (TSP) for maximum rotor durability and fatigue resistance
• CBN machine-turned finish minimizes disc thickness variation
• Thermo-Graphic Heat Paint (TGHP) indicators included as standard
• Compatible with existing DBA 5000 Series aluminum hats — no need to replace the full assembly
• Recommended for high-performance street, track day, club racing, and rally use

The DBA DBA52386.1S disc ring is engineered by Disc Brakes Australia (DBA), a globally recognized brake manufacturer with over four decades of experience in performance rotor design and manufacturing.