Cummins introduces service-friendly air disc brakes for heavy single rear axles
At FDIC International 2026, Cummins unveiled the QuikDisc rotor for U-Series wheel ends, targeting fire apparatus with rear axle ratings up to 33,500 lbs. The system applies its Meritor EX+ H air disc brake, already used on front axles, to the rear, addressing a long-standing gap where heavier single rear axles relied on drum brakes despite growing demand for improved stopping performance and fade resistance.
Beyond braking performance, the biggest change is in serviceability. Traditional rotor replacement on heavy axles requires removing the full wheel end assembly: hub, bearings, seals, and all. This process can take three to four hours and often requires multiple technicians.
The QuikDisc’s patented two-piece hub design eliminates that step. The hub remains in place while technicians remove only the rotor and mounting flange, cutting service time to under an hour and reducing the job to a one-person task. No bearing adjustments or seal replacements are required.
The system also simplifies parts management. An interchangeable flange supports both 11.25" and 335 mm bolt patterns, while shared components between front and rear axles reduce inventory complexity and streamline maintenance procedures.
“The fire and rescue industry has been asking for disc brakes on heavy single rear-drive axles for years and until now, the answer has been no. QuikDisc changes that. For the first time, heavy fire apparatus OEMs can spec disc brakes across the full vehicle, front and rear, and at the 33,500 lb rear rating the heavy market actually needs. And because rotor replacement no longer means pulling the wheel end, departments get the performance of disc brakes while also reducing service time,” said Perumal Rengasamy, senior product manager of specialty axles at Cummins.
Currently undergoing field validation with a Michigan fire department, the QuikDisc rotor is expected to be available through OEMs for new vehicles in late 2027.