ノルリル加工ダクロメット高炭素鋼ブレーキローター

Brake Rotors · Fitment · Installation · Bedding · Care Guide

Brake Rotor Care Guide

Brake rotors are not just round discs that bolt behind the wheel. Rotor diameter, thickness, offset, vane direction, surface pattern, material, coating, hat design, pad compound, and driving use all affect fitment and performance.

This guide explains how to choose, install, bed in, inspect, and care for TTSPORT brake rotors so the rotor and pad system works as intended.

1. Before Ordering: Confirm the Rotor Specification

Do not order rotors by appearance or diameter alone. Two rotors can look similar but use different offsets, hub registers, vane directions, bolt patterns, thicknesses, or hat designs.

• Vehicle year, make, model, trim, market version, and chassis code if available
• Front or rear axle position
• Current rotor diameter, thickness, center bore, and bolt pattern if known
• Current caliper model and brake pad shape if known
• Wheel diameter, wheel offset, and spoke / barrel clearance if rotor size changes
• Rotor construction: one-piece, two-piece, floating, fixed, iron, steel, or carbon ceramic
• Driving use: daily street, mountain road, towing, HPDE, rally, track, drift, or competition

Brake rotors are application-specific. A wrong rotor offset or thickness can misalign the caliper, create pad overhang, cause vibration, or prevent wheel clearance.

2. Choose the Rotor Type by Use Case

The best rotor is the one matched to the vehicle and driving use. Surface pattern alone does not make a rotor better.

3. Before Installation: Inspect and Prepare

Rotor installation quality directly affects pedal feel, vibration, pad wear, and service life. A premium rotor installed on a dirty hub can still develop brake judder.

• Inspect the new rotor for shipping damage, coating damage, cracks, burrs, or incorrect machining.
• Confirm rotor diameter, thickness, center bore, bolt pattern, offset, and left / right orientation where applicable.
• Clean the wheel hub mounting face until it is flat and free of rust, scale, dirt, paint buildup, and debris.
• Clean the rotor mounting face and friction surfaces with brake cleaner where required.
• Confirm wheel bearing condition and hub runout if vibration existed before the rotor replacement.
• Use fresh or correctly prepared brake pads when installing new rotors.
• Confirm caliper bracket, pad hardware, guide pins, pistons, and brake hoses are in safe working condition.

4. Installation Checks

5. Extra Checks for Two-Piece Rotors

Two-piece rotors need additional inspection because the friction ring, hat, and mounting hardware work together as a serviceable assembly.

• Confirm friction ring diameter, thickness, vane direction, and bolt pattern before assembly.
• Inspect rotor hats for cracks, fretting, corrosion, worn bolt holes, or damaged hub registers.
• Use the correct bolts, nuts, washers, bobbins, or floating hardware specified for the rotor assembly.
• Torque hat hardware in the required sequence and use the specified locking method.
• Do not mix old and new hardware unless TTSPORT specifically allows it for that rotor design.
• After the first heat cycle, inspect hardware security and ring-to-hat condition where required.

A two-piece rotor is not automatically floating. Floating behavior depends on the hat, friction ring, bobbins, fasteners, and assembly design.

6. Bedding and First Heat Cycle

Bedding is required for new rotors and pads. The goal is to create an even pad material transfer layer on the rotor surface and gradually heat-stabilize the rotor before full-load use.

• Follow the bedding procedure supplied with the exact pad and rotor combination.
• Start with controlled moderate stops unless the supplied procedure requires otherwise.
• Do not begin with emergency stops on fresh rotors and pads.
• Avoid coming to a full stop and holding the brake pedal while the pads and rotors are very hot.
• Allow a cool-down period after bedding before parking the vehicle.
• After bedding, inspect pedal feel, rotor surface, pad contact, abnormal vibration, and fluid leaks.

Street pads, race pads, carbon ceramic pads, iron rotors, two-piece rotors, and CCB rotors may require different bedding procedures. Use the supplied TTSPORT procedure for the specific system.

7. First 500–1,000 km (300–600 mi)

After the initial bedding cycle, give the rotor and pad pair time to settle. Avoid treating a fresh brake setup like a fully heat-cycled race system on day one.

• Avoid repeated emergency stops unless required for safety.
• Avoid dragging the brakes downhill for long periods.
• Use progressive braking instead of sudden last-second pedal input.
• Monitor for vibration, steering-wheel shake, grinding, or abnormal smell.
• Recheck wheel torque and brake hardware where the installation procedure requires it.
• Inspect rotor surface appearance after the first few drives.

8. On-Road Care

• Do not shock hot rotors: after spirited driving, track use, towing, or mountain descents, do not spray hot rotors with cold water.
• Do not hold the car on hot brakes: after heavy braking, avoid sitting still with heavy pedal pressure when possible.
• Use engine braking on long descents: reduce continuous brake heat where appropriate and safe.
• Watch surface rust: light surface rust after rain or washing is normal on iron rotors and usually clears during the first few stops.
• Investigate pitting: deep rust pitting, heavy scoring, grooves, or material transfer patches should be inspected.

9. Routine Rotor Inspection

Rotors are wear items. Inspect them more often if the vehicle sees track use, mountain roads, towing, winter salt, off-road use, or aggressive pad compounds.

• Measure rotor thickness and compare it with the minimum thickness specification.
• Check both inner and outer friction faces for scoring, cracks, grooves, heat spots, and uneven deposits.
• Inspect the outer edge for a large wear lip.
• Check for vibration, pedal pulsing, or steering-wheel shake under braking.
• Inspect drilled holes or slot ends for cracks where applicable.
• Inspect two-piece rotor hats and hardware for loosening, fretting, corrosion, or damaged bolt holes.
• Check pad wear at the same time; uneven pad wear can point to caliper or rotor alignment issues.

10. When to Replace Rotors

• Rotor thickness is at or below the minimum specification.
• Cracks are deep, growing, or extending from drilled holes, slots, or edges.
• Severe scoring, pitting, or hot spots cannot be corrected safely.
• Brake judder remains after proper bedding, pad inspection, and hub / runout checks.
• The rotor has heavy corrosion on the friction face or vane structure.
• The rotor hat, hardware, or mounting interface is damaged on a two-piece rotor.
• The rotor has been overheated beyond the service limit for the compound and use case.

Do not run rotors below minimum thickness. Thin rotors have reduced heat capacity and can compromise braking safety.

11. Stop Driving If You Notice These Symptoms

• Grinding, scraping, or metal-on-metal brake noise
• Severe vibration, brake judder, or steering-wheel shake
• Visible rotor cracks, missing material, or severe heat damage
• Heavy scoring or grooves that appear suddenly
• Vehicle pulling strongly to one side under braking
• Soft pedal, sinking pedal, or sudden increase in stopping distance
• Loose rotor, caliper, bracket, rotor hat, or hardware noise