ECO air disk brake axle
The ECO air disc axle is one of the advanced products of RST Axles, designed to enhance efficiency, safety, and reduce maintenance costs for heavy-duty trucks and trailers. With a load capacity of 9,000 kilograms and a disc brake system with a diameter of 430 mm, this axle provides high reliability and stability under demanding working conditions.
The ECO design increases durability and service life while simultaneously reducing energy consumption and operational costs. In terms of technical specifications, this axle is available under product codes 81510320001 and 81510320002. It features BM distances of 2040 and 2095 mm, and a kingpin distance of 1300 mm. The axle is compatible with a 10-bolt wheel pattern (M22×1.5) and standard tire size 385/65 R 22.5. These features make the ECO axle suitable for a wide range of trailers and heavy transportation systems.
Axle Technical Data Table
| Product code | Axle Load | Brake system | BM | FM | SP | OH/K | Tyres Recommended |
|---|---|---|---|---|---|---|---|
| 81510320001 | 9000kg | Disk Brake Ø430 | 1260 | 1300 | 2040 | 280/335 10Bolts M22 x 1.5 |
385/65R 22.5 |
| 81510320002 | 2095 |
Suspension System Specifications
| E | C | F | D | G | Empty without air X(mm) | Loaded without air X(mm) | Air Spring Bracket(mm) | ST | FH |
|---|---|---|---|---|---|---|---|---|---|
| 205 | 90 | 35 | 80 | 140 | 240 | 225 | - | 205 | 340 |
| 270 | 255 | 50 | 370 | ||||||
| 300 | 285 | 100 | 400 | ||||||
| 205 | 90 | 67 | 85 | 140 | 330 | 315 | - | 290 | 430 |
| 355 | 340 | 50 | 455 | ||||||
| 390 | 375 | 100 | 490 |
Axle Technical Data Table
Suspension System Specifications
The suspension system of this axle is designed to maintain balance and stability in both unloaded and loaded conditions. Precise adjustments for the air spring bracket, X distances, and ST and FH dimensions allow for even force distribution and reduce excessive stress on chassis components.
The main advantages of the ECO kingpin disc axle include shorter braking distance, improved road safety, greater component durability, and reduced maintenance and repair costs. These features make it an ideal choice for transportation companies and trailer manufacturers seeking a high-quality, efficient, and high-performance product.

