Tank 300 Big Brake Kit Upgrade / TTSPORT Classic 5440
The Tank 300 has become one of the hottest names in China's off-road scene, but its stock brakes are sized for daily driving, not the weight and speed this SUV is capable of carrying off-road or on the highway. This case study covers a Tank 300 fitted with a TTSPORT 5440 forged four-piston big brake kit, matched to the vehicle's stock 17-inch wheels.
The upgrade package for this build: TT5440 forged four-piston calipers, 330x28mm high-carbon heat-treated curved rotors, and TTSPORT stainless steel brake lines — all installed behind the factory 17-inch wheels.
Vehicle & Kit Specs
| Item | Specification |
|---|---|
| Vehicle | Tank 300, stock 17-inch wheels |
| Front caliper | TTSPORT 5440 forged four-piston caliper |
| Front rotor | 330x28mm high-carbon heat-treated curved rotor |
| Lines | TTSPORT stainless steel brake lines |
The table below is TTSPORT's official spec sheet for the 5440 caliper used in this build.
| Brake Caliper | |
|---|---|
| Series | Classic Series |
| Model / Application | 5440 |
| Axle Position | Front |
| Piston Count | 4-piston |
| Piston Type | Star-profile racing pistons without dust boots |
| Piston Diameter | 38 mm × 2 / 41 mm × 2 |
| Caliper Dimensions | L 276 mm × W 138 mm × H 80 mm |
| Total Piston Area | 49.1 cm² per caliper, all pistons combined |
| Manufacturing Process | Two-piece forged aluminum body |
| Net Weight | 2.65 kg per caliper, without pads |
| Surface Finish | High-temperature gloss coating |
| Recommended Wheel Size | 17 in or larger |
| Recommended Rotor Size | Ø330–345 mm × 28 mm |
| Fitment & Installation | |
| Minimum Spoke Clearance (mm) | 86 |
| Caliper Mounting Type | Radial mount with vehicle-specific caliper brackets |
| Brake Line Fitting Type | Vehicle-specific fittings; caliper-side and chassis-side fittings vary by application |
Why It Works
The 5440 is a two-piece forged caliper built with a 3,000-ton forging process rather than cast aluminum. A forged, split-body caliper flexes less under clamping load than a factory single-piston sliding caliper, which is a big part of why the pedal feels firmer and more predictable once it's installed. The competition-style star-profile pistons and 49.1 cm² of combined piston area also spread clamping force more evenly across the pad.
The 330x28mm high-carbon heat-treated rotor adds mass and surface area over the stock disc, which means more thermal capacity for repeated hard stops. According to TTSPORT, the heat-treated construction resists warping and cracking, runs quieter, and holds up to wear better than a standard rotor over time.
- No wheel swap needed — the 5440's slim caliper profile clears the Tank 300's stock 17-inch wheels
- Larger rotor and forged caliper together improve stopping feel under sustained braking
- Stainless steel lines replace rubber lines to cut down on pedal sponginess from line expansion
Installation Gallery
Frequently Asked Questions
What wheel size does the TTSPORT 5440 kit fit on the Tank 300?
What's included in this Tank 300 big brake kit?
What makes the TT5440 caliper different from the stock caliper?
Need fitment confirmation? Choose the closest TTSPORT series or send your vehicle, wheel size, and intended use before ordering.