# A1321MAX Mackay Deemax Disc Rotor 12" Ventilated MAAX Coated 6-Stud | Marine Trailer Part

🔧 Product Description

  

Genuine Mackay Marine Trailer Products DeeMaxx 12" Ventilated MAAX-Coated Slip-Over Rotor - Six Stud - Part Number: A1321MAX

  

A 12-inch ventilated DeeMaxx slip-over disc rotor with corrosion-resistant MAAX coating for compatible six-stud LandCruiser hubs. The ventilated construction improves heat dissipation during repeated braking.

  

⚙️ Key Features

  

• Galvanised or corrosion-resistant marine-trailer construction

• 6 stud × 139.7mm PCD wheel mounting pattern

• Uses the separate compatible hub bearing system bearing configuration

• Designed for compatible mechanical or hydraulic trailer braking where specified

• Serviceable bearings, seals, dust cap and wheel studs

  

📏 Specifications

  

• Wheel-size application: Heavy-duty LandCruiser-pattern wheels

• Stud pattern: 6 stud × 139.7mm PCD

• Bearing family: Uses the separate compatible hub bearing system

• Rotor/hub specification: 12-inch ventilated slip-over rotor; approximately 23mm thick, 93mm centre bore

• Published application rating: matching DeeMaxx heavy-duty brake system

• Brake application: Hydraulic or compatible mechanical DeeMaxx disc caliper

• Wheel studs, bearing preload, seal and caliper alignment must follow the component specification

• Rotor hat height, centre bore and caliper bracket must match the installed DeeMaxx system

  

📋 Supplied Components

  

• 1 × DeeMaxx MAAX-coated ventilated slip-over rotor

  

🔄 Cross Reference & Related Parts

  

• Stainless-steel version: DeeMaxx RTR-120-SS-6 family

• Compatible hub family: Mackay A1316G

  

🚤 Compatibility & Application

  

• Confirm wheel stud PCD, centre bore, bearing journals, seal surface and axle-nut thread

• Brake rotor thickness and offset must match the caliper and mounting bracket

• The complete running-gear capacity is limited by the lowest-rated axle, bearings, hub, wheel, tyre, brakes and suspension

• Set bearing preload and wheel-nut torque correctly after installation

• Flush and inspect regularly after saltwater immersion

  

🔌 Function

  

Supports the trailer wheel on tapered roller bearings and, on disc-hub versions, provides the friction rotor used by the brake caliper.

  

Common signs of wear, damage or replacement required:

  

• Bearing noise, heat or excessive wheel play

• Rotor is scored, cracked, warped or below minimum thickness

• Stud holes or wheel studs are damaged

• Seal leakage or water-contaminated grease

• Hub or rotor has excessive runout

  

📦 Condition

  

• Genuine Mackay Marine Trailer Products part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 192.6 AUD
- **Vendor:** Mackay
- **Tags:** Mackay Boat Trailers | Marine Trailer Parts & Accessories

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 192.60 AUD | In stock |

## Images

- A1321MAX Mackay Deemax Disc Rotor 12" Ventilated MAAX Coated 6-Stud | Marine Trailer Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/a1321max-mackay-deemax-disk-rotor-12-ventilated-maax-coated-6-stud-1)
> Updated: 2026-08-05