CASE Study #3

Independent Front Suspension and Rear Inverted Portal Axle
for Low Floor Midibus

Market Context

Urban transport is increasingly moving toward compact midibus platforms (8–10 m) as an alternative to traditional 12-meter buses. These vehicles require low-floor layouts, fast passenger flow, and high maneuverability, especially in dense city centers. Conventional rear axles limit floor height and interior flexibility, making third-door integration impossible.

The BRIST Solution

BRIST developed a dedicated inverted portal axle specifically engineered for low-floor midibus applications. The architecture is optimized for compact packaging, reduced mass, and urban duty cycles.

Key features:

  • Over 70 kg weight reduction versus conventional solutions

  • Portal gear design enabling low-floor layout and third door

  • Compatibility with diesel engine, CNG powertrain and electric drivetrains via three input angles (75°, 80°, 90°)

Value for Urban Mobility

The BRIST inverted portal axle enables low-floor midibus architectures with improved accessibility, faster passenger loading and unloading, and greater interior layout flexibility, including multi-door configurations.

Optimized weight distribution and reduced system mass contribute to higher vehicle efficiency and maneuverability, supporting the global shift toward shorter, more agile urban buses as an effective alternative to the traditional 12-meter city bus.

Application Example

BMC Neocity Bus with BRIST Axles
Independent Front Suspension and Inverted Portal Axles
BMC Neocity was awarded with Busworld Best Design Label