Alliance 381 Flotmaster Flotation Radial Agricultural Implement Tire

The Alliance 381 Flotmaster (also known as the Flotation Radial) is a steel-belted radial flotation implement tire engineered for demanding agricultural applications on sensitive surfaces. Developed specifically for field operations where soil and plant protection are critical — including grasslands, forage areas, and cover crop fields — the 381 series delivers a proven combination of low ground pressure, gentle tread disturbance, and reliable load-carrying performance across a wide range of towed implement types.

At the core of the 381's design is a unique zig-zag rib tread pattern with rounded shoulders that maximizes the tire's footprint across the soil surface, spreading load over the largest possible contact patch to minimize ruts, compaction, and crop damage. Shoulder lugs with excellent self-cleaning capabilities provide consistent grip, preventing excessive tire slippage and protecting sensitive turf and forage surfaces from unnecessary disturbance.

Key Features:

• Steel-belted radial construction — provides enhanced durability, improved ground contact, and better heat dissipation compared to bias-ply designs, especially beneficial during high-speed road transport
• Zig-zag rib tread pattern with rounded shoulders — engineered to protect turf, forage, and cover crops while minimizing soil disturbance and reducing fuel loss from slippage
• Wide flotation profile — distributes weight evenly to reduce ground pressure and soil compaction on the most sensitive surfaces
• Stubble-resistant rubber compound — reduces the risk of puncture damage in no-till and post-harvest field conditions while minimizing road wear
• Specially engineered bead area — ensures superior load-carrying capacity across demanding implement applications
• Available in standard Radial, IF (Increased Flexion), and VF/AgriFlex+ (Very High Flexion) constructions — IF variants carry 20% greater load than a standard radial at the same inflation pressure; VF variants carry up to 40% more load or can operate at significantly reduced inflation pressures for maximum compaction reduction
• High-speed capable — steel belts aid heat dissipation, supporting road travel at higher speeds with reduced tire wear
• Broad implement compatibility — suited for planters, wagons, grain carts, trailers, spreaders, balers, cultivators, liquid manure spreaders, tankers, and other towed farm equipment
• One of the widest size ranges in the industry — available across an extensive range of sizes to fit virtually any implement application

Alliance, a brand under Yokohama Off-Highway Tires, has been a pioneer in flotation tire technology since the early 1990s — developing one of the first bias-ply flotation tires, then introducing the industry's first radial flotation tire, and later becoming the first manufacturer to produce a Very High Flexion (VF) flotation tire. The 381 series reflects that legacy of innovation and is backed by Alliance's 10-year warranty.