Knurled Dacromet High-Carbon Steel Brake Rotor

Brake Rotor Friction Ring · High-Carbon Cast Iron · Two-Piece Rotor Service

Knurled Dacromet High-Carbon Cast-Iron Brake Rotor Friction Ring

TTSPORT knurled Dacromet high-carbon cast-iron brake rotor friction rings are custom-machined rotor discs for compatible two-piece brake rotor assemblies. They are built for drivers who want stronger thermal stability, cleaner pad transfer, and better repeatability than a basic factory-style one-piece rotor can provide.

Heat-treated high-carbon cast iron, a knurled bedding surface, internal ventilation, and Dacromet anti-corrosion protection make these rings a strong upgrade for performance street driving, canyon roads, and weekend track use when paired with the correct rotor hat, mounting hardware, and pad compound.

Why a Two-Piece High-Carbon Ring

Designed for Heat Management

• Internally vented ring structure promotes airflow through the rotor for faster cool-down between braking events.
• High-carbon cast iron helps damp vibration and supports quieter braking behavior than a basic untreated gray-iron rotor.
• Two-piece compatibility allows the friction ring and hat to be matched around vehicle hub offset, caliper centerline, and hardware style.
• Floating-style mounting behavior depends on the matching hat and hardware design; confirm the correct hardware before assembly.
• Serviceable format allows worn friction rings to be replaced while reusing compatible aluminum hats when the hats remain undamaged and within specification.

Friction Ring Only

Specifications

Specs reflect the friction ring only. Final dimensions depend on the configuration selected at order.

This product page describes brake rotor friction rings only. Rotor hats, rotor hat bolts, bobbins, nuts, washers, brake pads, calipers, brake hoses, brake fluid, and complete two-piece rotor assemblies are not included unless separately specified on the final order.

Fitment Check Before Ordering

• Confirm friction ring outside diameter and overall thickness.
• Confirm left/right vane direction if the rotor uses directional ventilation.
• Confirm hat-to-ring bolt count, bolt-circle diameter, bolt diameter, and hardware style.
• Confirm whether the assembly uses fixed hardware, floating bobbins, or another TTSPORT-approved mounting format.
• Confirm rotor hat offset and caliper centerline before changing ring size or ring thickness.
• Confirm pad compound compatibility for performance street, canyon, or light track use.

Installation Notes

• Bed-in is required. Follow the pad manufacturer's bedding procedure to deposit a uniform transfer layer.
• Use new, matched hardware when assembling the ring to the hat unless the rotor manufacturer specifically approves hardware reuse.
• Torque mounting hardware to the specified value in the required sequence. Do not guess torque values.
• Clean the rotor hat mounting face, friction ring mounting face, and hardware contact areas before assembly.
• Inspect ring thickness, surface condition, heat checking, and runout periodically.
• Replace the ring before it reaches minimum thickness or shows unsafe cracking, heavy scoring, or abnormal wear.
• Pair with a pad compound suited to the use case: street, mixed-use, or light track.

Service Expectations

• High-carbon cast iron improves thermal stability, but it does not make the ring immune to cracking or wear.
• Light heat checking can occur in performance use; growth rate and crack depth must be inspected during service.
• Weekend track use requires more frequent thickness, runout, and surface-condition checks than street use.
• Dacromet coating protects non-friction areas; any coating or residue on the pad path will wear through during initial braking.
• If switching to a different pad compound, clean, resurface, or replace the rotor as needed to avoid incompatible transfer layers.

Frequently Asked Questions