Monoblock Forged Caliper
One-piece aluminum body for high rigidity and minimal flex under hard rear-axle load.
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Mono Series · Rear Axle · Monoblock Forged BBK
The Mono EMB4 is a rear-axle big brake kit engineered to balance a front upgrade with stable bias, clean pedal modulation, and repeatable stopping power. A 4-piston monoblock forged aluminum caliper drives 30 mm pistons against 28 mm two-piece rotors sized 345, 355, or 380 mm — with steel or carbon-ceramic options to match your build.
One-piece aluminum body for high rigidity and minimal flex under hard rear-axle load.
30 mm × 4 pistons, 28.3 cm² total piston area per caliper for even pad loading.
Two-piece pistons reduce heat transfer from pad to fluid, helping pedal feel during repeated stops.
Sized to pair with a larger front BBK without overpowering the rear axle.
Three rotor diameters and 18 in+ wheel clearance for a wide range of fitments.
| Brake Caliper | ||
|---|---|---|
| Series | Mono Series | |
| Model / Application | EMB4 | |
| Axle Position | Rear | |
| Piston Count | 4-piston | |
| Piston Type | Two-piece heat-insulated pistons, no dust boots | |
| Piston Diameter | 30 mm × 4 | |
| Total Piston Area | 28.3 cm² per caliper | |
| Caliper Dimensions | L 268 × W 164 × H 68 mm | |
| Manufacturing Process | Monoblock forged aluminum body | |
| Net Weight | 2.55 kg per caliper, without pads | |
| Surface Finish | Nickel-plated | |
| Recommended Wheel Size | 18 in or larger | |
| Recommended Rotor Size | Ø345–380 mm × 28 mm | |
| Brake Rotor Options | ||
| Rotor Option | Steel (Option A) | Carbon-Ceramic (Option B) |
| Rotor Material | Heat-treated high-carbon cast iron | Carbon-ceramic composite |
| Axle Position | Rear | Rear |
| Rotor Dimensions | Ø345 / 355 / 380 mm × 28 mm | Ø380 mm × 28 mm |
| Construction | Two-piece assembly | Two-piece assembly |
| Ventilation | Internally vented | Internally vented |
| Rotor Mounting | Fixed or floating, by rotor size & application | Floating |
| Directional Design | Yes — left/right specific | Yes — left/right specific |
| Rotor Face Pattern | Curved slot / Grain slot / Wave slot / Drilled & slotted | Cross-drilled |
| Brake Pad Options | ||
| Pad Option | For Steel Rotors | For Carbon-Ceramic Rotors |
| Compatible Rotor Material | Iron / steel rotors only | Carbon-ceramic rotors only |
| Operating Temperature Range | 0–600 °C | 0–700 °C |
| Average Friction Coefficient | μ ≈ 0.38 | μ ≈ 0.45 |
| Lines | ||
| Brake Line Construction | Three-layer construction | |
| Brake Line Material | PTFE inner liner / SUS304 stainless braid / PVC outer sheath | |
| Brake Line Function | Reduces line expansion for a firmer pedal | |
| Brake Line Fittings | Vehicle-specific on caliper and chassis sides | |
| Brackets | ||
| Rotor Hat Manufacturing Process | CNC-machined | |
| Rotor Hat Material | High-strength aluminum alloy | |
| Caliper Bracket Manufacturing Process | CNC-machined | |
| Caliper Bracket Material | Carbon steel | |
| Caliper Mounting Type | Radial mount with vehicle-specific brackets | |
| Fitment & Installation | ||
| Minimum Spoke Clearance | 101 mm | |
| Recommended Wheel Size | 18 in or larger | |
| Rotor Diameter Selection | 345, 355, or 380 mm, selected according to vehicle application and wheel clearance | |
| Bedding-In Procedure | Required before aggressive driving | |
Friction varies with temperature, line pressure, and rotor condition. Always match pads to rotor material.
Two EMB4 rear calipers.
Matched pads for both rear calipers.
Two-piece rotors in your selected size and material.
CNC carbon-steel vehicle-specific brackets.
CNC aluminum hats.
Stainless braided lines.
Confirm wheel inner-barrel clearance, rotor diameter, and vehicle application before ordering. Use the included template or contact us with your wheel and vehicle details.
18 in or larger wheels are required.
The EMB4 requires at least 101 mm spoke clearance. Larger rotors and certain wheel designs may require more clearance.
Confirm rotor size, bracket availability, brake line fittings, and rear brake bias for your vehicle before ordering.
It is designed to balance a larger front BBK and deliver clean rear bias without overpowering the chassis.
Rear-axle only. It is designed to balance a larger front BBK and deliver clean rear bias without overpowering the chassis.
Steel rotors come in Ø345, 355, or 380 mm × 28 mm. Carbon-ceramic is offered in Ø380 mm × 28 mm. All are two-piece, internally vented, and directional.
18 in or larger, with at least 101 mm spoke clearance. Larger rotors and certain wheel designs may require more clearance — verify with a fitment template.
No. Pads are compound-specific. Use iron/steel pads on steel rotors and CCB-spec pads on carbon-ceramic rotors only.
Two EMB4 rear calipers, two-piece rotors in your selected size and material, matched pads, stainless braided lines, CNC aluminum hats, and CNC carbon-steel vehicle-specific brackets.
Yes. A proper bed-in transfers an even pad layer to the rotor face, which is critical for bite, modulation, and long-term rotor life.
Need help confirming wheel clearance, rotor size, or bracket availability for your vehicle?
Brake Kits · Fitment · Installation · 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.
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.
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.
Different TTSPORT brake kit series use different hardware layouts. Always confirm what the kit includes before purchase.
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.
Use separate friction rings and rotor hats. Hat offset, ring bolt pattern, hardware style, and rotor direction must be matched correctly.
May require bespoke brackets, rotor hats, brake lines, and engineering confirmation based on knuckle, hub, wheel, and competition use.
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.
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.
If any part is not listed in the final order or product page, do not assume it is included.
Inspect every component before installation. Do not modify, grind, drill, stretch, force, or space brake kit components to make them fit.
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.
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.
Verify caliper centering over the rotor and confirm even pad sweep across the friction surface.
Confirm left / right rotor direction if the rotor uses directional vanes or directional face pattern.
Check brake hose length and routing at full steering lock and full suspension travel. No twisting, rubbing, stretching, or kinking.
Check caliper-to-spoke and caliper-to-barrel clearance before road use. Wheel diameter alone is not enough.
Use the correct brake fluid type and bleed the system until pedal feel is firm and consistent.
Torque all brake hardware to the specified value. Do not reuse damaged, unknown, stretched, or corroded safety-critical fasteners.
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.
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.
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.
Brake kits need regular inspection, especially after track use, off-road use, towing, mountain driving, winter salt exposure, or any brake service.
Inspect pads, rotors, fluid level, and hose condition during normal service intervals. Prioritize quiet operation, smooth pedal feel, and even wear.
Check pad thickness, rotor surface condition, and fluid condition more often. Long descents create sustained heat even without track use.
Inspect for mud, sand, stone impact, hose abrasion, dust boot damage, and caliper contamination after trail use.
Inspect pads, rotors, fluid, and hardware before and after every event. Track heat shortens service intervals.
Check rear brake temperature, hydraulic handbrake behavior, pad wear, rotor cracking, and hardware condition frequently.
Use only compatible pads and approved bedding procedures. Inspect rotor surface condition carefully and avoid incompatible friction materials.
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.
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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