One pad, four calipers: the MFLEX4™ air disc brake pad

By Cummins Inc., Global Power Technology Leader

Mar 26, 2026

When it comes to heavy-duty truck maintenance, simplicity matters. That’s why Cummins Inc. has developed the Meritor® MFLEX4™ air disc brake pad, a patent-pending solution designed with technicians in mind.

What is the MFLEX4 air disc brake pad?

Engineered for the Class 8 commercial vehicle segment, the MFLEX4 pad delivers durability and performance while helping fleets and service providers simplify brake maintenance. For aftermarket customers looking for both quality and convenience, this new product raises the bar.

MFLEX4 FITS

Which calipers does the MFLEX4 air disc brake pad fit?

The Meritor MFLEX4 air disc brake pad is Cummins’ latest aftermarket innovation for North America. This single pad is designed to fit four commonly used caliper models in North America, covering 70% of the Class 8 truck and trailer market:

Bendix® ADB22X®
Hendrickson MAXX22T™
WABCO MAXXUS™
WABCO PAN22™

Supporting multiple caliper platforms means fewer pad types to stock, easier inventory management, and more efficient service operations for fleets, distributors, and technicians.

How does the MFLEX4 simplify inventory for technicians?

Fitment uncertainty is one of the biggest frustrations for maintenance managers and technicians. Ordering the wrong part leads to downtime, added cost, and missed schedules. MFLEX4™ solves this by working across multiple air disc brake systems, giving fleets and repair shops flexibility and peace of mind.

With one pad covering four caliper models, fleets can reduce SKUs, minimize ordering errors, and lower overhead costs. This is especially important in on-highway applications, where uptime is critical. The MFLEX4™ pad helps ensure trucks get back on the road quickly with a high-quality pad ready to go.

What are additional benefits of the MFLEX4?

The MFLEX4 pad offers more than versatility. It includes features that improve performance, reduce operating costs and extend component life.

Meritor Positive Pad Retraction (PPR) Springs: These springs pull the pad away from the rotor when the brake is released, reducing drag. Less drag means better fuel economy and longer life for pads and rotors, lowering cost per mile over time.
OE-Quality Friction Material: Two friction mixes – linehaul and severe service – are engineered to meet or exceed applicable original equipment (OE) pad performance standards.
Uniform Pricing: MFLEX4 is priced consistently, regardless of the caliper it fits. This helps fleet managers predict and control maintenance costs, which is especially helpful in large or mixed-fleet operations.
Warranty Peace of Mind: MFLEX4 includes a limited one-year warranty, along with continued Bendix® ADB22X® caliper

Where can you get the MFLEX4 air disc brake pad?

The MFLEX4 air disc brake pad is now available through Meritor aftermarket parts distributors across North America. For more information, product support, or ordering tools, visit MeritorPartsXpress.com.

Author Profiles

Cummins Inc., a global power leader, is committed to powering a more prosperous world. Since 1919, we have delivered innovative solutions that move people, goods and economies forward. Our five business segments—Engine, Components, Distribution, Power Systems and Accelera™ by Cummins—offer a broad portfolio, including advanced diesel, electric and hybrid powertrains; integrated power generation systems; critical components such as aftertreatment, turbochargers, fuel systems, controls, transmissions, axles and brakes; and zero-emissions technologies like battery and electric powertrain systems. With a global footprint, deep technical expertise and an extensive service network, we deliver dependable, cutting-edge solutions tailored to our customers’ needs, supporting them through the energy transition with our Destination Zero strategy. We create value for customers, investors and employees and strengthen communities through our corporate responsibility global priorities: education, equity and environment. Headquartered in Columbus, Indiana, Cummins employs approximately 67,400 people worldwide and earned $2.8 billion on $33.7 billion in sales in 2025.

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