ARK Round Brake Mounting Plate – Suits 9” Hydraulic Drum Brakes on 45mm Round Axle (SKU: MPR45R)

ARK MPR45R Round Mounting Plate is designed specifically for trailers running 45mm round axles and fitted with 9” hydraulic drum backing plates. This heavy-duty brake plate is the perfect fitment base when installing or replacing hydraulic drum brake systems.

Crafted from high-strength steel and precision-formed to suit round axles, this mounting plate provides a secure, stable, and vibration-resistant base for your trailer’s brake components. Whether you’re building a new trailer, converting from electric to hydraulic brakes, or simply refreshing old hardware, the MPR45R gives you reliable performance and an exact fit.

Key Features:

• Round brake mounting plate for 45mm round axles
• Compatible with standard 9” hydraulic drum brake backing plates
• Heavy-duty construction for long-term durability
• Perfect for hydraulic brake upgrades or replacements
• Ideal for boat trailers, campers, and heavy-duty box trailers

This mounting plate takes the guesswork out of brake installation by offering a clean, purpose-built fit for your braking hardware—no cutting, welding, or risky custom jobs required.

FAQ

Q: What axle size does this mounting plate fit?

A: It’s designed to fit standard 45mm round axles commonly used in Australian trailers.

Q: What type of brake does this suit?

A: It suits 9” hydraulic drum brake backing plates. It’s not compatible with electric brake systems.

Q: Do I need welding or drilling to install?

A: No. The plate is designed to be directly installed with your brake hardware—no custom fabrication needed if matched properly.

Q: Is this for boat trailers?

A: Yes, it’s ideal for boat trailers or any trailer running hydraulic drum brakes on 45mm round axles.

Evaluation & Recommendation

The ARK MPR45R mounting plate is ideal for trailers needing secure fitment of 9” hydraulic drum brakes. Its round design makes it a perfect match for 45mm round axles, commonly seen in medium to heavy-duty trailers.

Recommended for:

• Boat trailers using hydraulic drum brakes
• Builders converting from electric to hydraulic brakes
• Maintenance and replacement of worn or rusted mounting plates

Installation Tips:

• Confirm your axle is a 45mm round style
• Match brake backing plates to the 9” hydraulic format
• Clean mounting surfaces before installation to avoid misalignment

Still not sure if it fits your system? Send us your axle specs and we’ll help you lock in the right match.