1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your Yokohama Geolandar AT G015 All-Terrain Tire. Designed for light trucks and SUVs, this tire offers a balance of on-road comfort and off-road capability, with durable construction for long tread life and reliable year-round traction, including in snow conditions. Please read this manual thoroughly to ensure safe and optimal performance.
2. Product Overview
The Yokohama Geolandar AT G015 is an On-/Off-Road All-Terrain tire engineered for versatility and durability. Key features include:
- All-Terrain Performance: Capable of handling diverse driving conditions, from paved roads to challenging off-road environments.
- Enhanced Durability: Constructed to withstand rigorous use and provide extended tread life.
- Year-Round Traction: Optimized tread design ensures reliable grip in various weather conditions, including light snow.
- Universal Fit: Designed for broad compatibility with light trucks and SUVs.
- Load Capacity: Each tire has a load capacity of 828 pounds.
Figure 2.1: Front view of the Yokohama Geolandar AT G015 tire, showcasing its tread pattern and sidewall lettering.
3. Installation (Setup)
Proper installation is crucial for tire safety and performance. It is highly recommended that tire installation be performed by a qualified professional using appropriate equipment.
3.1 Pre-Installation Checks
- Vehicle Compatibility: Ensure the tire size (LT235/75R15 104S C) matches your vehicle's specifications as recommended by the vehicle manufacturer.
- Wheel Condition: Inspect wheels for damage, corrosion, or deformation. Do not mount tires on damaged wheels.
- Valve Stems: Always install new valve stems when replacing tires.
3.2 Mounting and Balancing
- Tires must be mounted on approved rims by trained personnel.
- Use proper lubrication during mounting to prevent bead damage.
- Ensure tires are correctly balanced to prevent vibrations and uneven wear.
3.3 Inflation
- Inflate tires to the pressure recommended by your vehicle manufacturer, typically found on a placard inside the driver's side door jamb, glove compartment, or owner's manual. Do not exceed the maximum pressure indicated on the tire sidewall (51 PSI for this model).
- Check tire pressure when tires are cold (driven less than one mile).
Figure 3.1: Side view of the Yokohama Geolandar AT G015 tire, showing the sidewall markings and overall profile.
4. Operation (Usage)
Adhering to proper operating practices will maximize tire life and ensure driving safety.
4.1 Driving Conditions
- On-Road: Maintain recommended tire pressure for optimal handling and fuel efficiency. Avoid sudden braking or acceleration.
- Off-Road: The Geolandar AT G015 is designed for off-road use. Adjust tire pressure as appropriate for specific terrain (e.g., lower pressure for sand or rocks, but re-inflate to recommended levels for highway driving). Be mindful of sharp objects and obstacles.
- Snow/Wet Conditions: The tire offers year-round traction. Drive cautiously, reduce speed, and increase following distance in adverse weather.
4.2 Load and Speed
- Do not exceed the tire's maximum load capacity (828 pounds per tire) or the vehicle's Gross Vehicle Weight Rating (GVWR).
- Adhere to the tire's speed rating (S, indicating a maximum speed of 112 mph or 180 km/h), but always drive within legal speed limits and conditions.
5. Maintenance
Regular maintenance extends tire life and ensures safety.
5.1 Tire Pressure
- Check tire pressure monthly, or before long trips, using a reliable gauge.
- Under-inflation or over-inflation can lead to premature wear, reduced fuel efficiency, and compromised handling.
5.2 Tire Rotation
- Rotate tires every 5,000 to 7,500 miles (8,000 to 12,000 km) or as recommended by your vehicle manufacturer to promote even wear.
5.3 Tread Inspection
- Regularly inspect the tire tread for signs of uneven wear, cuts, punctures, or embedded objects.
- Check tread depth. Tires should be replaced when the tread wears down to 2/32 inch (1.6 mm), indicated by tread wear indicators.
Figure 5.1: Close-up view of the Yokohama Geolandar AT G015 tire tread, highlighting the siping and block design for traction.
5.4 Cleaning
- Clean tires with mild soap and water. Avoid harsh chemicals that can damage rubber.
6. Troubleshooting
This section addresses common tire-related issues.
| Issue | Possible Cause | Solution |
|---|---|---|
| Uneven Tread Wear | Improper inflation, misalignment, unbalanced wheels, lack of rotation. | Check and adjust tire pressure. Have vehicle alignment checked. Balance wheels. Implement regular tire rotation. |
| Vibrations or Shaking | Unbalanced wheels, bent rim, loose wheel nuts, worn suspension components. | Have wheels balanced. Inspect rims and suspension. Tighten wheel nuts to specified torque. |
| Frequent Air Loss | Puncture, faulty valve stem, bead leak, porous wheel. | Inspect tire for punctures and repair if possible. Replace valve stem. Have tire re-seated on rim. Inspect wheel for damage. |
| Reduced Traction | Worn tread, improper inflation, unsuitable driving conditions. | Check tread depth and replace if worn. Adjust tire pressure. Drive cautiously and adjust speed to conditions. |
If you experience any persistent issues or concerns, consult a professional tire technician immediately.
7. Specifications
Detailed specifications for the Yokohama Geolandar AT G015 LT235/75R15 104S C tire:
| Attribute | Value |
|---|---|
| Brand | Yokohama |
| Model | Geolandar A/T G015 |
| Part Number | 01510 |
| Size | LT235/75R15 104S C |
| Section Width | 235 Millimeters |
| Load Capacity | 828 Pounds |
| Tread Depth | 13 32nds |
| Tread Type | Non-Directional |
| Maximum Pressure | 51 Pound per Square Inch |
| Rim Width | 10.6 Inches |
| Tire Diameter | 29.33 Inches |
| Item Weight | 26.7 Pounds |
| Automotive Fit Type | Universal Fit |
| UPC | 721506015106 |
| Construction Type | R (Radial) |
| UTQG | 600AB |
| Made In | United States |
8. Warranty and Support
For information regarding the warranty coverage for your Yokohama Geolandar AT G015 tires, please refer to the official Yokohama website or contact Yokohama customer service directly. Warranty terms and conditions typically cover manufacturing defects and may vary. Keep your purchase receipt as proof of purchase.
For technical support or further inquiries, please visit the official Yokohama website or consult with an authorized Yokohama tire dealer.
Important: Always ensure that any tire service or repair is performed by a certified professional.
