The R-1W tread of SUNDOM tires is specifically designed for certain agricultural operation requirements. The specification 380/85R28 is typically used for the steering wheels of medium and large tractors or some harvesters. Here is a detailed introduction from technical features to practical applications:
I. Pattern Design and Positioning
· R-1W tread grade: In
agricultural tire standards, R-1 represents deep tread traction patterns, while the "W" in R-1W usually stands for"Wet" (an enhanced version for wet conditions). Compared to the standard R-1, R-1W has deeper tread depth and larger gaps between the gripping tee
th.
· Self-cleaning ability: This deep and open design is particularly advantageous in wet and heavy clay or paddy fields. It can effectively remove the adhered soil through the rotation of the tire, ensuring continuous traction.
II. Specification Explanation: 380/85R28
· Tire width (380mm): Approximately 38 centimeters, it is a medium-width tire. It ensures buoyancy while minimizing resistance in water fields as much as possible.
· Flattening ratio (85%): It belongs to the high-width ratio series, which means the sidewall of the tire is higher, and the tire body is thicker. The high sidewall can provide a buffering effect, reduce vibrations on uneven field roads, and protect the wheel rim.
SIZE
380/85R28
LOAD INDEX
133/130
SOEED SYMBOLS
A8/B
OD(MM)
1357
SW(MM)
380
RIM
W12
INFLATED PRESSURE(KPA)
160
MAX LOAD (KG)
2060
III. Structure and Performance Characteristics
ylon or steel cord structure. With a width of 380mm and a deep rubber layer, the tire has strong protection
when it is punctured by sharp objects such as stubble and gravel.
· Traction and braking: The R-1W pattern provides better grip than ordinary patterns when climbing slopes, starting with heavy loads, or braking on slippery surfaces, reducing fuel consumption and time wasted caused by skidding.
IV. Applicable Scenarios
· Dual-purpose for water and land: Although the R-1W is mainly designed for wetland use, it also has good adaptability in dry land tillage and transportation operations. However, if you mainly conduct long-distance transfer on hard surfaces, be aware that the deep tread pattern may generate significant driving noise on the paved road surface.
· Suggested accessories: This specification is commonly found on the front wheels of tractors (paired with large-sized ground tires on the rear wheels) or the front steering wheels of four-wheel drive tractors. When installing, pay attention to the rolling direction marking of the tires (if any) to achieve the best self-cleaning effect.
V. Maintenance Tips
· Air pressure control: When performing heavy-duty operations in the field, it is recommended to inflate to the lower limit of the standard air pressure to increase the contact area and reduce sinking; during road transportation, the air pressure can be appropriately increased to reduce wear.
· Wear observation: The tread depth of R-1W is relatively deep. When the remaining depth of the tread grooves is less than one-third of the original depth, the traction in wet conditions will significantly decrease. It is recommended to replace the tire at this time.
VI. RELATED TYRE
IF320/90R46 420/85R38 420/85R30
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