Modern agriculture demands more than just rolling wheels. The SUNDOM 420/70R28 R-1W tire is specifically designed for medium to high-horsepower tractors, delivering lasting traction and reliable durability under complex field conditions.
1. Size Interpretation: Wide Section & Optimized Diameter
In "420/70R28," "420" refers to a section width of 420mm, "70" is the aspect ratio, paired with a 28-inch rim diameter. This design increases ground contact while maintaining road transport stability. Compared to traditional bias tires, the radial construction (marked "R") reduces casing deformation and ensures even pressure distribution, effectively minimizing soil compaction — critical for soil health.
2. R-1W Tread: Designed for Wet & Heavy-Duty Conditions
The key highlight is the R-1W tread pattern. "R-1" stands for standard agricultural traction, while the "W" suffix indicates "Wet" or "Mud" reinforcement.
· Deeper tread depth: Significantly deeper than standard R-1 tires, extending wear life.
· Large-angle, open design: The aggressive lugs and open shoulders enable excellent self-cleaning in muddy, sticky soil or snowy conditions, maintaining grip and reducing slippage. Tests show a 15%-20% improvement in traction efficiency in wet, cohesive soils.
3. SUNDOM Technical Backing
SUNDOM specializes in agricultural and off-road tires. This 420/70R28 features:
· High-strength casing ply: Superior puncture resistance against straw and stones in the field.
· Ozone-resistant sidewall compound: Slows aging caused by sun exposure and chemical fertilizer contact.
· Regroovable design (on select sizes): Allows secondary grooving to extend total lifecycle cost (TLC).
4. Application Recommendations
This tire is ideal for:
· Drive axles (front/rear): Providing final propulsion for tractors in the 100–180 HP range.
· Combine harvesters: Used on steering or drive axles.
· Challenging conditions: Especially recommended for wet-field farming, plowing, and heavy tillage.
5. Maintenance Tips
1. Inflation pressure: Radial tires are pressure-sensitive. For heavy field work, inflate to standard pressure (typically 20% lower than road pressure) to maximize footprint. For road transport, add pressure to reduce heat buildup.
2. Rotation direction: Check for directional arrows on the sidewall — R-1W patterns are often directional.
The SUNDOM 420/70R28 R-1W tire delivers wide footprint, deep lugs, and strong self-cleaning — making it a reliable partner to boost your agricultural equipment's efficiency. Especially recommended for rainy-season harvests or sticky soil conditions.
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