MASTERCRAFT COURSER MXT
Mastercraft Courser Mxt LT305/55R20 E 121 Q Tire User Manual
Model: COURSER MXT | Brand: MASTERCRAFT
1. Introduction
This manual provides essential information for the safe and effective use of your Mastercraft Courser Mxt LT305/55R20 E 121 Q Tire. Please read it thoroughly before installation and use.
The Mastercraft Courser MXT is engineered as a mud terrain tire, featuring an aggressive tread design, functional side biter shoulders, and robust 2-ply carcass construction. This design ensures durable and dependable off-road traction. Its wide-groove pattern effectively clears mud, dirt, and debris, maximizing grip. The “zig zag” shape of the center channel enhances off-road traction while maintaining good on-road contact for stability and handling. Full-depth siping improves wet traction by providing biting edges on wet surfaces.
2. Key Features
- Large Surface Area Tread Blocks: Designed to provide increased grip on both on-road and off-road surfaces.
- Aggressive Upper Sidewall Design: Features deep “side biter” elements to enhance off-road traction and improve sidewall abrasion resistance.
- Angled Shoulder Scallops: These scallops contribute to mud traction by creating a “mud-scoop” effect, aiding in self-cleaning.
- Proven 2-Ply Carcass Construction: The MXT carcass design utilizes established technology known for its durability and performance.
- Stone Ejector Ribs: Integrated ribs at the base of the grooves help prevent stone capture and drilling, protecting the tire casing.
3. Setup and Installation
Proper installation is crucial for tire performance and safety. It is highly recommended that tire mounting and balancing be performed by a qualified professional using appropriate equipment.
3.1. Pre-Installation Check
- Verify that the tire size (LT305/55R20) matches your vehicle's specifications and rim size (9.5 Inches).
- Inspect the tire for any visible damage or defects before mounting.
- Ensure the rim is clean, free from rust, and undamaged.
3.2. Mounting
Mount the tire onto the rim according to industry standards, ensuring proper bead seating. Use appropriate lubrication to prevent damage during mounting.
3.3. Inflation
Inflate the tire to the vehicle manufacturer's recommended pressure, typically found on a placard inside the driver's side door jamb or in the vehicle owner's manual. The maximum pressure for this tire is 65 PSI (Pound per Square Inch).

Figure 1: Mastercraft Courser Mxt tire mounted on a wheel, showcasing its aggressive tread pattern and sidewall design.
4. Operating Guidelines
Adhering to proper operating practices will maximize tire life and ensure safety.
4.1. Driving Conditions
- Off-Road: The aggressive tread and side biters are designed for mud and uneven terrain. Reduce speed and engage appropriate vehicle settings for off-road driving.
- On-Road: While optimized for off-road, the tire provides good contact for on-road stability. Maintain safe driving speeds and distances.
- Wet Weather: Full-depth siping enhances wet traction. Drive cautiously in wet conditions.
4.2. Load and Speed
- Do not exceed the tire's maximum load capacity of 3195 pounds per tire.
- The tire has a speed rating of 'Q', indicating a maximum safe speed of 99 mph (160 km/h). Always adhere to local speed limits and drive according to road conditions.

Figure 2: A top-down view highlighting the intricate and aggressive tread pattern of the Mastercraft Courser Mxt tire, designed for optimal grip.
5. Maintenance
Regular maintenance extends tire life and ensures consistent performance.
5.1. Tire Pressure
- Check tire pressure monthly, or before long trips, using a reliable gauge. Adjust to the vehicle manufacturer's recommended PSI.
- Under-inflation or over-inflation can lead to premature wear and unsafe driving conditions.
5.2. Tire Rotation
Rotate tires every 5,000 to 7,500 miles (8,000 to 12,000 km) to promote even wear and maximize tread life. Consult your vehicle's owner's manual for the recommended rotation pattern.
5.3. Tread Depth
Regularly inspect tread depth using a tread depth gauge or the built-in tread wear indicators. The original tread depth is 19.5 32nds. Replace tires when tread depth reaches 2/32 inch (1.6 mm).
5.4. Cleaning
The tire features good self-cleaning properties. However, after heavy off-road use, inspect and clean any remaining mud or debris from the tread and sidewalls to prevent imbalance or damage.

Figure 3: A detailed view of the robust tread blocks on the Mastercraft Courser Mxt tire, designed for aggressive traction.
6. Troubleshooting Common Issues
| Issue | Possible Cause | Solution |
|---|---|---|
| Uneven Tread Wear | Improper inflation, misalignment, lack of rotation. | Check and adjust tire pressure, perform wheel alignment, rotate tires regularly. |
| Vibration or Shimmy | Unbalanced tires, bent rim, loose suspension components. | Have tires balanced, inspect rims and suspension. |
| Loss of Air Pressure | Puncture, faulty valve stem, bead leak. | Inspect tire for punctures, check valve stem, have tire professionally inspected and repaired. |
| Reduced Traction | Worn tread, improper tire pressure, unsuitable driving conditions. | Check tread depth, adjust tire pressure, adapt driving to conditions. |
7. Product Specifications
| Specification | Value |
|---|---|
| Brand | MASTERCRAFT |
| Model | COURSER MXT |
| Size | LT305/55R20 |
| Section Width | 305 Millimeters |
| Load Capacity | 3195 Pounds |
| Tread Depth | 19.5 32nds |
| Tread Type | Directional |
| Maximum Pressure | 65 Pound per Square Inch |
| Rim Width | 9.5 Inches |
| Tire Diameter | 33.31 inches |
| Item Weight | 57.7 pounds |
| Construction Type | Radial |
| Automotive Fit Type | Universal Fit |
| Special Features | tread_wear_indicator |
| Manufacturer Part Number | 246396 |
| Date First Available | August 21, 2014 |

Figure 4: A complete view of the Mastercraft Courser Mxt tire, highlighting its overall design and robust construction.
8. Warranty Information
The Mastercraft Courser Mxt tire is backed by the manufacturer's warranty. For specific details regarding warranty coverage, terms, and conditions, please refer to the official Mastercraft website or contact their customer service directly. Keep your purchase receipt as proof of purchase.
9. Customer Support
For further assistance, technical inquiries, or support, please contact Mastercraft customer service. You can find contact information on the official Mastercraft website or through your authorized dealer.
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