Larger Front Rotor Mass
Larger Ø290 mm rotor mass adds thermal capacity for repeated stops on descents and trails.
Email: sales@ttsport-racing.com
Currency
Direct-Mount Series · Front Axle · 4-Piston
The TTSPORT Suzuki Jimny Front Big Brake Kit is a Direct-Mount Series upgrade built around the WD4 forged 4-piston caliper, a Ø290 mm × 22 mm internally vented rotor, and vehicle-specific stainless braided lines. It is engineered to restore front-axle braking authority on Jimnys running heavier wheels, tires, bumpers, and trail gear that the factory brake was never sized for.
Larger Ø290 mm rotor mass adds thermal capacity for repeated stops on descents and trails.
WD4 forged 4-piston caliper with 38 mm pistons and 45.4 cm² total piston area per caliper.
Direct-mount design bolts to the factory front knuckle with no adapter stack.
Stainless braided lines reduce hose expansion for a firmer pedal.
Designed to clear 15 in or larger wheels with proper spoke geometry and 71 mm minimum spoke clearance.
Configured for Suzuki Jimny JB23 / JB33 / JB43 / JB53 / JB64W / JB74W / JC74W front-axle applications.
| Brake Caliper | |
|---|---|
| Series | Direct-Mount Series |
| Model / Application | WD4 |
| Axle Position | Front |
| Piston Count | 4-piston |
| Piston Type | Aluminum-alloy pistons without dust boots |
| Piston Diameter | 38 mm × 4 |
| Caliper Dimensions | L 213 mm × W 117 mm × H 92 mm |
| Total Piston Area | 45.4 cm² per caliper, all pistons combined |
| Manufacturing Process | Two-piece forged aluminum body |
| Net Weight | 2.15 kg per caliper, without pads |
| Surface Finish | High-temperature gloss coating |
| Recommended Wheel Size | 15 in or larger |
| Recommended Rotor Size | Ø290 mm × 22 mm |
| Brake Rotor | |
| Rotor Material | Heat-treated high-carbon cast iron |
| Axle Position | Front |
| Rotor Dimensions | Ø290 mm × 22 mm |
| Construction | One-piece rotor |
| Ventilation | Internally vented |
| Rotor Mounting | Fixed |
| Directional Design | Yes — left/right specific |
| Rotor Face Pattern | Curved slot / Grain Slot |
| Brake Pads | |
| Compatible Rotor Material | Iron / steel rotors only |
| Operating Temperature Range | 0–600 °C |
| Average Friction Coefficient | Average μ: 0.38; variation depends on temperature, line pressure, and rotor condition |
| Lines | |
| Brake Line Construction | Three-layer reinforced construction |
| Brake Line Material | PTFE inner liner / SUS304 stainless-steel braid / PVC protective outer sheath |
| Brake Line Fittings | Vehicle-specific fittings; caliper-side and chassis-side fittings vary by application |
| Vehicle Application & Rotor Mapping | |
| 1998-2018 Suzuki Jimny (JB23 / JB33 / JB43 / JB53) | Front · Ø290 mm × 22 mm |
| 2018-2026 Suzuki Jimny (JB64W / JB74W) | Front · Ø290 mm × 22 mm |
| 2023-2026 Suzuki Jimny 5-Door (JC74W) | Front · Ø290 mm × 22 mm |
| Fitment & Installation | |
| Primary Vehicle Application | Suzuki Jimny |
| Model Years & Chassis Codes | 1998-2018 JB23 / JB33 / JB43 / JB53 · 2018-2026 JB64W / JB74W · 2023-2026 JC74W |
| Axle | Front |
| Caliper Mounting Type | Direct mount |
| Minimum Wheel Size | 15 in or larger |
| Minimum Spoke Clearance | 71 mm |
| Brake Line Fitting Type | Vehicle-specific fittings; caliper-side and chassis-side fittings vary by application |
| Order Verification | Confirm chassis code, wheel clearance, current front hub, ABS sensor configuration, and brake-line fitting style before ordering |
| Bedding-In Procedure | Required |
Minimum spoke clearance: 71 mm. Wheel fitment depends on spoke shape, offset, and hub-face geometry — not just wheel diameter. Confirm clearance before ordering.
2 × WD4 forged 4-piston front calipers, left/right specific.
Brake pads for both front calipers, rated 0–600 °C and intended for iron / steel rotors.
2 × Ø290 mm × 22 mm one-piece internally vented front rotors, curved slot / Grain Slot, and left/right specific.
2 × three-layer stainless-steel braided front brake lines with vehicle-specific fittings.
Vehicle-specific mounting hardware for direct-mount Suzuki Jimny front-axle installation.
WD4 is a Direct-Mount front kit. Caliper brackets and rotor hats are not used on this configuration.
To avoid fitment issues, confirm chassis code, wheel diameter, spoke clearance, current front hub, ABS sensor configuration, and brake-line fitting style before purchase.
15 in or larger wheels are required.
Minimum spoke clearance: 71 mm.
Confirm Suzuki Jimny chassis code: JB23 / JB33 / JB43 / JB53 / JB64W / JB74W / JC74W.
Wheel fitment depends on spoke shape, offset, and hub-face geometry — not just wheel diameter. Confirm clearance before ordering.
Yes. This WD4 Direct-Mount front kit is configured for Suzuki Jimny chassis codes JB23, JB33, JB43, JB53, JB64W, JB74W, and JC74W. Confirm your exact chassis code, front hub, ABS sensor configuration, wheel size, and brake-line fitting style before ordering.
15 in or larger wheels are required, with at least 71 mm minimum spoke clearance to the front caliper. Wheel diameter alone is not enough; spoke shape, offset, hub-face geometry, and inner barrel profile must be checked before ordering.
Supported front applications include 1998-2018 Suzuki Jimny JB23, JB33, JB43, and JB53; 2018-2026 Suzuki Jimny JB64W and JB74W; and 2023-2026 Suzuki Jimny 5-Door JC74W.
This is a front-axle kit using Ø290 mm × 22 mm one-piece, internally vented, fixed, left/right directional front rotors with a Curved slot / Grain Slot face pattern.
No. This is a Direct-Mount Series WD4 application with direct-mount front calipers and one-piece front rotors. Caliper brackets and rotor hats are not used on this configuration.
No. The WD4 front calipers use aluminum-alloy pistons without dust boots. Inspect and clean the piston area during regular service, especially after mud, dust, water crossings, off-road use, or salted-road driving.
The kit includes two WD4 forged 4-piston front calipers, brake pads for both front calipers, two Ø290 mm × 22 mm one-piece vented directional front rotors, stainless-steel braided brake hoses, and vehicle-specific mounting hardware for direct-mount installation.
Yes. A proper bedding-in procedure is required to transfer pad material evenly to the rotor face and reach stable braking performance before aggressive use.
Need fitment confirmation, custom caliper color, or a quote?
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.
Thanks for subscribing!
This email has been registered!