1. Introduction
This manual provides essential information for the proper installation, use, and maintenance of your Duro DM1154 80/100-12 Rear Tire. Adhering to these instructions will help ensure optimal performance and longevity of the tire. Please read this manual thoroughly before installation and use.
2. Product Overview
The Duro DM1154 is a rear off-road tire designed for motorcycles and powersports vehicles. It features a bias construction and a tread pattern optimized for maximum grip on soft to intermediate terrain, enhancing traction, stability, and braking performance.

Figure 2.1: The Duro DM1154 80/100-12 Rear Tire, showcasing its aggressive, block-style tread pattern designed for off-road performance. The tire is black with visible sidewall markings.
- Position: Rear
- Rim Size: 12 inches
- Tire Application: Intermediate Off-road
- Tire Construction: Bias
- Tire Size: 80/100-12
- Tread Type: Non-Directional
3. Installation
Proper tire installation is crucial for safety and performance. It is highly recommended that tire installation be performed by a qualified professional using appropriate tools and techniques.
3.1 Pre-Installation Checks
- Verify that the tire size (80/100-12) matches the vehicle's specifications and the rim size (12 inches).
- Inspect the tire for any manufacturing defects or damage prior to mounting.
- Ensure the rim is clean, free from damage, and compatible with the tire.
3.2 Mounting Procedure (General Guidelines)
- Lubricate the tire beads and rim flanges with a suitable tire mounting lubricant.
- Carefully mount one bead of the tire onto the rim.
- Insert the inner tube (if applicable) and partially inflate it to prevent pinching.
- Mount the second bead onto the rim, ensuring the inner tube is not pinched.
- Inflate the tire to the recommended pressure, ensuring both beads seat properly on the rim. Listen for two distinct pops as the beads seat.
- Check for leaks using a soapy water solution around the bead area.
- Install the wheel onto the vehicle, ensuring all fasteners are torqued to the manufacturer's specifications.
Important: Always refer to your vehicle's owner's manual and the tire manufacturer's guidelines for specific installation procedures and recommended tire pressures.
4. Operating Guidelines
Proper operation and maintenance are essential for tire performance and safety.
4.1 Tire Pressure
- Maintain correct tire pressure as specified by your vehicle manufacturer. This information is typically found on a placard (e.g., inside a door panel) or in the owner's manual.
- Check tire pressure regularly, preferably when tires are cold.
- Incorrect tire pressure can lead to premature wear, reduced handling, and increased risk of tire failure.
4.2 Terrain Suitability
This tire is designed for soft to intermediate off-road terrain. Using it on unsuitable surfaces (e.g., hard pavement for extended periods) may accelerate wear and reduce performance.
5. Maintenance
Regular inspection and maintenance will extend the life of your tire and ensure safe operation.
- Regular Inspection: Periodically inspect the tire for cuts, punctures, bulges, or uneven wear. Remove any embedded objects.
- Tread Depth: Monitor tread depth. Replace the tire when the tread wears down to the minimum legal or recommended depth indicators.
- Cleaning: Clean the tire with mild soap and water. Avoid harsh chemicals that can degrade rubber.
- Storage: When not in use, store tires in a cool, dry place away from direct sunlight, heat sources, and ozone-producing equipment (e.g., electric motors).
6. Troubleshooting
This section addresses common issues related to off-road tires.
- Loss of Air Pressure: Check for punctures, valve stem leaks, or improper bead seating. Repair or replace as necessary.
- Uneven Wear: Can be caused by incorrect tire pressure, suspension issues, or aggressive riding styles. Ensure proper inflation and inspect vehicle suspension.
- Reduced Grip: May indicate worn tread, incorrect tire pressure for conditions, or unsuitable terrain. Inspect tread, adjust pressure, or change riding surface.
- Vibrations: Could be due to an unbalanced wheel, damaged tire, or bent rim. Have the wheel and tire inspected by a professional.
For persistent or severe issues, consult a qualified tire professional.
7. Specifications
| Feature | Specification |
|---|---|
| Brand | DURO |
| Model Number | 25-115412-80-TT |
| Tire Size | 80/100-12 |
| Position | Rear |
| Rim Size | 12 Inches |
| Section Width | 80 Inches |
| Tread Type | Non-Directional |
| Construction Type | Bias |
| Item Weight | 6.4 Pounds (approx.) |
| UPC | 779423045720 |
8. Safety Information
- Professional Installation: Always have tires installed by trained professionals.
- Inflation: Never exceed the maximum inflation pressure indicated on the tire sidewall or the vehicle manufacturer's recommendations.
- Compatibility: Ensure the tire is compatible with your vehicle and rim.
- Proposition 65 Warning: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
- Vehicle Data: The use of tire and vehicle data accessible through this webpage is limited to persons located in the United States of America and Canada. Always verify data with a tire professional, the vehicle placard, and/or the vehicle owner's manual.
9. Warranty and Support
For warranty information, please refer to the documentation provided with your purchase or contact the manufacturer directly. Support for this product is typically provided by the retailer or the manufacturer, DURO.





