Alliance 30407601 304 Bias R-1 18.4-28 D TT 138A8 Agricultural R-1 Tire

The Alliance 304 Bias R-1 in size 18.4-28 is an agricultural drive wheel tire engineered for rear tractor applications. Built on a strong nylon bias carcass with an 8-ply rating, this R-1 tread-pattern tire is recommended for hillside operations and is capable of occasional short on-road drives. Its tubetype (TT) construction and robust build make it a dependable choice for demanding field conditions across a wide range of soil types.

Key Features:

• Knife-like lugs with a double-angle design and wide spacing for aggressive soil penetration and efficient self-cleaning in any soil condition
• 45° angle bar with center studs for improved traction, better resistance to side slip, and continuous rolling stability
• Strong nylon bias carcass — 8-ply rated — guards against mechanical failures and moisture deterioration
• R-1 agricultural tread pattern optimized for rear drive wheel tractor use and hillside operations
• Load Index 138 / Speed Rating A8 — rated at 5,200 lbs maximum load (single) at 25 mph
• Maximum inflation pressure: 20 PSI
• Overall diameter: 59.1 in | Overall width: 18.4 in | Rim diameter: 28 in
• Tread depth: 50/32 in
• Tubetype (TT) construction

The Alliance 304 Bias R-1 18.4-28 delivers reliable drive wheel performance for tractors operating on hillsides and in varied field conditions, combining deep-penetrating lug geometry with self-cleaning capability to maintain consistent traction and reduce slippage across diverse agricultural environments.