TR68 Front 6-Piston Big Brake Kit

Q: What rotor size should I choose?

Ø355 mm for tighter tracks and lighter cars, Ø378 mm as the all-round track-day choice, and Ø390 mm for high-speed circuits, heavier platforms, or endurance use. All three are 36 mm thick.

Product Detail
Care Guide

Racing Series · Circuit · Front Axle · 6-Piston

The TR68 is a front-axle, 6-piston monoblock big brake kit built for circuit work — repeat lap pace, predictable pedal feel deep into a session, and a service window that holds up to real track abuse. Forged aluminum body, staggered piston bores, and a two-piece rotor package sized from Ø355 to Ø390 mm give you the thermal headroom and bite balance circuit drivers actually need.

Why Builders Choose the TR68

The TR68 is built for circuit drivers who need thermal repeatability, tunable brake balance, and serviceable hardware across long sessions. A monoblock forged body, staggered 6-piston bore layout, 36 mm-thick two-piece rotors, and PTFE / SUS304 braided lines work together to deliver a firm, linear pedal under sustained load.

Monoblock Forged Caliper

One-piece forged aluminum body resists flex under high line pressure, keeping piston alignment honest lap after lap. Caliper weighs 3.19 kg without pads.

Staggered 6-Piston Bore

27 / 32 / 38 mm differential bores load the pad evenly front-to-rear, fighting taper wear and keeping the friction surface flat through long stints. Total piston area: 50.10 cm² per caliper.

Two-Piece Race Rotors

Ø355, 378, or 390 mm × 36 mm two-piece assemblies with directional vanes. Choose curved slot, grain slot, wave slot, or drilled-and-slotted faces.

Pad Window You Can Tune

Standard compound 0–600 °C, μ ~0.38. Optional racing compound 0–750 °C, μ ~0.45 for higher-energy circuits and heavier cars.

Thermal Repeatability

36 mm-thick vented two-piece rotors and a forged caliper shed heat across long sessions without pedal fade.

Serviceable Track Platform

Two-piece rotor design lets you replace friction rings only — hats, bobbins, and hardware stay in service.

Technical Specifications & Kit Options

Brake Caliper
Series	Racing Series — Circuit
Model / Application	TR68
Axle Position	Front
Piston Count	6-piston
Piston Type	Racing pistons without dust boots
Piston Diameter	27 mm × 2 / 32 mm × 2 / 38 mm × 2
Caliper Dimensions	299 mm × 191 mm × 79.4 mm
Total Piston Area	50.10 cm² per caliper
Manufacturing Process	Monoblock forged aluminum body
Net Weight	3.19 kg per caliper, without pads
Surface Finish	Nickel-plated
Recommended Wheel Size	18 in or larger
Recommended Rotor Size	Ø355–390 mm × 36 mm
Brake Rotor Options
Rotor Option	355 mm	378 mm	390 mm
Rotor Material	Heat-treated high-carbon cast iron or Option B racing-grade heat-treated high-carbon cast iron	Heat-treated high-carbon cast iron or Option B racing-grade heat-treated high-carbon cast iron	Heat-treated high-carbon cast iron or Option B racing-grade heat-treated high-carbon cast iron
Axle Position	Front	Front	Front
Rotor Dimensions	Ø355 mm × 36 mm	Ø378 mm × 36 mm	Ø390 mm × 36 mm
Construction	Two-piece rotor assembly	Two-piece rotor assembly	Two-piece rotor assembly
Ventilation	Internally vented	Internally vented	Internally vented
Rotor Hats	Application-specific alloy rotor hats	Application-specific alloy rotor hats	Application-specific alloy rotor hats
Rotor Mounting	Fixed or floating, depending on rotor size and vehicle	Fixed or floating, depending on rotor size and vehicle	Fixed or floating, depending on rotor size and vehicle
Directional Design	Yes — left/right specific	Yes — left/right specific	Yes — left/right specific
Rotor Face Pattern	Curved slot / Grain slot / Wave slot / Drilled & slotted; Option B: Wave slot	Curved slot / Grain slot / Wave slot / Drilled & slotted; Option B: Wave slot	Curved slot / Grain slot / Wave slot / Drilled & slotted; Option B: Wave slot
Recommended Use	Lightest rotor option for tighter circuits, lower-mass cars, or wheel-clearance-limited builds	Balanced choice for most track-day and time-attack builds	Maximum leverage and heat capacity for high-speed circuits, heavier platforms, and endurance use
Brake Pad Options
Pad Option	Standard		Option B Racing
Compatible Rotor Material	Iron / steel rotors only		Iron / steel rotors only
Operating Temperature	0–600 °C		0–750 °C
Average Friction Coefficient	μ ~0.38, varies with temperature, pressure, and rotor condition		μ ~0.45, varies with temperature, pressure, and rotor condition
Recommended Use	HPDE and club-level track use		Endurance, heavy cars, and sustained high-energy stops
Lines, Brackets & Service
Brake Line Construction	Three-layer reinforced
Brake Line Material	PTFE inner liner / SUS304 stainless-steel braid / PVC protective outer sheath
Caliper Mounting	Radial mount with vehicle-specific caliper brackets
Caliper Brackets	Vehicle-specific radial caliper brackets
Brake Line Fittings	Vehicle-specific; caliper-side and chassis-side fittings vary by application
Wheel Clearance	18 in or larger wheel recommended; final clearance depends on wheel design, spoke shape, barrel offset, rotor size, and bracket package
Rotor Service	Two-piece rotor design allows friction ring replacement while retaining the alloy hat, bobbins, and hardware when serviceable
Bedding-In Procedure	Required before track use

Track-use product. Racing pistons run without dust boots and racing pads have higher cold-bite thresholds. Bedding-in is required. Confirm wheel clearance, 18 in minimum, and final fitment with TTSPORT before installation.

Package List

Calipers ×2

2 × TR68 front monoblock forged 6-piston calipers with nickel-plated finish.

Brake Pads

Brake pads for both front calipers, selected from Standard 0–600 °C or Option B Racing 0–750 °C package.

Brake Rotors ×2

2 × two-piece internally vented front rotors, selected from Ø355 / 378 / 390 mm × 36 mm, left/right specific.

Caliper Brackets ×2

Vehicle-specific radial-mount caliper brackets for correct front caliper alignment.

Rotor Hats ×2

Application-specific alloy rotor hats matched to front hub geometry and rotor offset.

Brake Hoses ×2

Three-layer stainless-steel braided brake lines with PTFE inner liner, SUS304 braid, and PVC protective outer sheath.

The Bespoke Engineering Process

Every TR68 front circuit racing system is engineered around the vehicle’s front knuckle, hub location, rotor hat offset, wheel barrel, spoke clearance, brake line routing, front brake bias target, rear brake pairing, tire package, and intended motorsport use. The goal is not a generic universal fit; the goal is a front brake package that works with your chassis geometry and delivers repeatable pedal behavior under sustained circuit heat.

1. Technical Consultation

We review the chassis, front suspension and knuckle setup, motorsport use, target front brake behavior, rear brake pairing, wheel package, tire compound, vehicle weight, power level, and whether the car uses OEM or custom front uprights.

2. Data Submission

For OEM knuckles, provide vehicle information, wheel specs, hub geometry, and intended use. For custom uprights, motorsport hub conversions, or non-OE rotor offsets, provide CAD files, technical drawings, hub-face data, rotor mounting dimensions, or accurate bracket mounting-point measurements.

3. Engineering Review & Approval

TTSPORT confirms rotor diameter, vehicle-specific caliper bracket geometry, rotor hat offset, wheel clearance, brake line fittings, pad compound, and pad-to-rotor alignment before production begins.

If you are unsure whether your wheel, front knuckle, hub geometry, rotor offset, rear brake pairing, or brake line routing is suitable, Contact us before ordering so the engineering team can review the build details.

Installation & Break-In

Every TR68 kit ships with vehicle-specific radial-mount brackets and matched braided lines.
If your chassis is not already in the TTSPORT database, send hub geometry, wheel spec, and photos so the engineering team can model the bracket, confirm rotor offset, and validate pad-to-rotor alignment before production.
Choose Ø355 mm for tighter tracks, lower-mass cars, or wheel-clearance-limited builds.
Choose Ø378 mm as the balanced choice for most track-day and time-attack builds.
Choose Ø390 mm for high-speed circuits, heavier platforms, and endurance use.
Standard 0–600 °C / μ 0.38 pad covers HPDE and club-level track use.
Racing 0–750 °C / μ 0.45 pad is the call for sustained high-energy stops.
Bedding-in is required before track use to transfer pad material evenly to the rotor face and stabilize the friction surface.

Frequently Asked Questions

Is the TR68 a front or rear kit?

Front axle. It's a 6-piston front big brake kit. Pair with a matched TTSPORT rear kit to maintain brake balance.

What rotor size should I choose?

Ø355 mm is suited to tighter tracks, lighter cars, or wheel-clearance-limited builds. Ø378 mm is the all-round track-day choice. Ø390 mm gives maximum leverage and heat capacity for high-speed circuits, heavier platforms, or endurance use. All three are 36 mm thick.

What's the difference between the standard and Option B Racing package?

Option B uses a racing-grade heat-treated high-carbon iron ring with a wave-slot face and the higher-temperature pad, 0–750 °C with μ ~0.45. It's built for sustained high-energy braking. The standard package is suited to club track and HPDE use.

Will it fit under my wheels?

Recommended wheel size is 18 in or larger, but final clearance depends on wheel design, spoke shape, and barrel offset. Send your wheel spec and TTSPORT will confirm before shipping.

Are the rotors serviceable?

Yes. The two-piece design lets you replace just the friction ring when it is worn or cracked, reusing the aluminum hat and hardware. This is a major cost saving over consecutive track seasons.

Does the kit include brake lines and brackets?

Yes. Each kit ships with vehicle-specific radial-mount caliper brackets and three-layer PTFE / SUS304 / PVC braided lines with application-correct fittings.

Ready to Spec Your TR68?

Tell us your chassis, wheel size, and intended use — track day, time attack, or endurance — and we'll confirm rotor diameter, pad compound, rotor hat offset, bracket availability, and brake line fittings.

Brake Kits · Fitment · Installation · Care Guide

Brake Kit Care Guide

A brake kit is not just a pair of larger calipers. Calipers, rotors, pads, hoses, brackets, rotor hats, mounting hardware, brake fluid, wheel clearance, and bedding procedure all work together as one system.

This guide explains how to confirm the right TTSPORT brake kit before ordering, what to check before installation, and how to care for the system after installation.

1. Before Ordering: Confirm the Full Vehicle Setup

Do not order a brake kit by vehicle name alone. The correct kit depends on the vehicle, axle position, wheel package, driving use, and brake system layout.

Vehicle year, make, model, trim, market version, and chassis code if available
Front or rear axle position
Current brake rotor diameter, thickness, and caliper type if known
Wheel diameter, width, offset, spoke shape, and inner barrel clearance
Tire size and vehicle weight changes from armor, cargo, towing equipment, or track setup
Driving use: daily street, towing, mountain driving, off-road, HPDE, rally, drift, track, or competition
Whether the vehicle uses electronic parking brake, brake pad wear sensors, ABS / ESC systems, or special hydraulic routing

Brake kits are application-specific. A visually similar kit can still have the wrong rotor offset, bracket geometry, hose fitting, caliper position, or wheel clearance requirement.

2. Understand What Type of Brake Kit You Are Ordering

Different TTSPORT brake kit series use different hardware layouts. Always confirm what the kit includes before purchase.

Direct-Mount Kits

Use direct-mount calipers and one-piece rotors where specified. These kits do not use rotor hats or caliper brackets unless the final product page clearly states otherwise.

Two-Piece Rotor Kits

Use separate friction rings and rotor hats. Hat offset, ring bolt pattern, hardware style, and rotor direction must be matched correctly.

Racing / Custom Kits

May require bespoke brackets, rotor hats, brake lines, and engineering confirmation based on knuckle, hub, wheel, and competition use.

Off-Road / Heavy Vehicle Kits

Require extra attention to wheel clearance, tire size, vehicle load, descent control, hose routing, and dust / water exposure.

Do not assume every brake kit includes the same parts. Package contents vary by product series, vehicle application, and final order configuration.

3. Confirm the Kit Specification Before Payment

Before finalizing the order, review the kit specification carefully. Confirm the brake kit is matched to your vehicle and wheel setup, not only to the model name.

Confirm vehicle application and axle position
Confirm caliper model, piston count, and caliper color if applicable
Confirm rotor diameter, rotor thickness, rotor construction, and left / right direction if applicable
Confirm brake pad compound and intended use
Confirm brake hose fitting type and routing compatibility
Confirm whether caliper brackets, rotor hats, mounting hardware, wear sensors, or brake fluid are included
Confirm minimum wheel diameter and spoke clearance requirement
Confirm lead time, shipping method, and final invoice details

If any part is not listed in the final order or product page, do not assume it is included.

4. Before Installation: Inspect the Complete Kit

Inspect every component before installation. Do not modify, grind, drill, stretch, force, or space brake kit components to make them fit.

Check all received parts against the order confirmation
Inspect calipers, rotors, brackets, hats, hoses, pads, and hardware for shipping damage
Confirm left / right caliper and rotor orientation where applicable
Confirm rotor size, pad shape, hose fittings, bracket layout, and hardware style before installation
Clean all mounting faces before assembly
Confirm torque values, bedding procedure, fluid type, and bleeding procedure before starting work
Use a qualified brake technician for installation

Safety: Brake kits affect braking force, hydraulic sealing, heat control, wheel clearance, and vehicle stability. Do not install the kit if fitment, torque, direction, clearance, or compatibility is unclear.

5. Installation Checks

Correct installation is as important as the brake kit itself. A properly engineered kit can still perform poorly if installed with dirty mounting faces, incorrect torque, poor hose routing, or trapped air in the hydraulic system.

Caliper Position

Verify caliper centering over the rotor and confirm even pad sweep across the friction surface.

Rotor Orientation

Confirm left / right rotor direction if the rotor uses directional vanes or directional face pattern.

Brake Hose Routing

Check brake hose length and routing at full steering lock and full suspension travel. No twisting, rubbing, stretching, or kinking.

Wheel Clearance

Check caliper-to-spoke and caliper-to-barrel clearance before road use. Wheel diameter alone is not enough.

Brake Fluid & Bleeding

Use the correct brake fluid type and bleed the system until pedal feel is firm and consistent.

Hardware Security

Torque all brake hardware to the specified value. Do not reuse damaged, unknown, stretched, or corroded safety-critical fasteners.

6. Bedding and First Heat Cycle

Brake pads and rotors need a controlled bedding process before full performance is available. Bedding helps create an even transfer layer on the rotor surface, improving bite, pedal consistency, and vibration resistance.

Follow the bedding procedure supplied with the exact pad and rotor compound
Use moderate heat first unless the supplied procedure requires otherwise
Do not start with emergency stops on a fresh pad / rotor setup
Avoid holding the brake pedal while stopped on very hot pads and rotors
Allow the brakes to cool after bedding
After the first heat cycle, inspect pad contact, rotor surface, hose routing, hardware security, and fluid leaks

Street pads, race pads, iron rotors, two-piece rotors, and carbon ceramic rotors may require different bedding procedures. Use the procedure supplied with the specific kit.

7. Initial Break-In Period

After installation and bedding, give the system a short break-in period before aggressive use. Pedal feel, pad contact, dust output, and noise may continue to settle after the first drives.

Avoid repeated emergency stops unless required for safety
Avoid hard track use until bedding and inspection are complete
Monitor pedal feel, vibration, noise, smell, and rotor surface appearance
Recheck for fluid leaks after the first road test
Recheck torque where the kit instructions require post-heat-cycle inspection
Contact TTSPORT if brake feel changes suddenly after installation

8. Routine Care and Inspection

Brake kits need regular inspection, especially after track use, off-road use, towing, mountain driving, winter salt exposure, or any brake service.

Inspect brake pads for uneven wear, taper, glazing, cracking, or backing-plate damage
Inspect rotors for cracks, heavy scoring, hot spots, minimum thickness, and runout
Inspect calipers for fluid seepage, piston movement, dust boot damage, and uneven pad retraction
Inspect brake hoses for rubbing, cuts, swelling, leaks, and fitting corrosion
Inspect brackets, rotor hats, and mounting hardware for cracks, fretting, corrosion, or loosening
Check brake fluid level, color, service age, and boiling-point suitability for your driving use
Clean brake dust from wheels and calipers regularly, especially after wet, salty, or track conditions

9. Care by Use Case

Daily Street

Inspect pads, rotors, fluid level, and hose condition during normal service intervals. Prioritize quiet operation, smooth pedal feel, and even wear.

Towing & Mountain Roads

Check pad thickness, rotor surface condition, and fluid condition more often. Long descents create sustained heat even without track use.

Off-Road

Inspect for mud, sand, stone impact, hose abrasion, dust boot damage, and caliper contamination after trail use.

Track / HPDE

Inspect pads, rotors, fluid, and hardware before and after every event. Track heat shortens service intervals.

Drift / Competition

Check rear brake temperature, hydraulic handbrake behavior, pad wear, rotor cracking, and hardware condition frequently.

Carbon Ceramic

Use only compatible pads and approved bedding procedures. Inspect rotor surface condition carefully and avoid incompatible friction materials.

10. Stop Driving If You Notice These Symptoms

Do not continue driving if the brake system shows any of the following symptoms. Inspect the system or contact a qualified brake technician before using the vehicle again.

Soft pedal, sinking pedal, or sudden increase in pedal travel
Brake fluid leak or wetness near a line, caliper, fitting, or master cylinder
Grinding, scraping, severe vibration, or heavy brake judder
Vehicle pulling strongly to one side under braking
Burning smell after light driving
Loose wheel, rotor, caliper, bracket, or hardware noise
Brake warning light, ABS warning light, or traction-control fault after brake work

Need help confirming brake kit setup or care?

Send your vehicle details, brake kit series, wheel specs, driving use, photos, and any symptoms you notice. TTSPORT will help confirm fitment, installation checks, and the correct care path for your brake kit.

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