Agricultural tyre types and tread classifications
- Rear drive tyres (R-1): Deep angled curved tread lugs (typically 45-degree angle) engineered to deliver self-cleaning traction in wet paddy mud and dry clay.
- Front steering tyres (F-2): Multi-rib longitudinal tread design providing precise steering direction, side-slip prevention, and minimal soil disruption.
- Trailer and implement tyres: Broad flotation tyres engineered with high ply ratings (8 PR to 16 PR) to support heavy haulage loads on farm roads and highways.
Ply rating, sizing, and load capacity
- Common rear tractor sizes: 12.4-28, 13.6-28, 14.9-28, and 16.9-28 matching utility tractors from 35 HP to 65 HP.
- Common front tractor sizes: 6.00-16 and 7.50-16 for standard 2WD tractors, with wider traction tyres for 4WD front axles.
- Ply Rating (PR): Indicates the strength and load-carrying capacity of the tyre casing; higher ply ratings resist stubble punctures and stone cuts.
Maintenance practices to prevent premature wear
- Maintain correct air inflation pressure: Lower pressures (12-14 PSI) for field operations increase ground footprint, while higher pressures (18-22 PSI) are required for road haulage.
- Check wheel alignment and front toe-in regularly to prevent uneven shoulder tread wear.
- Park tractors in shaded areas during prolonged disuse to shield rubber compounds from ozone degradation and ultraviolet solar cracking.
Official source
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Central Institute of Agricultural Engineering (CIAE) ↗Related on KisanPe
Common questions
What is the difference between R-1 and F-2 tractor tyres?
R-1 tyres are rear lugged drive tyres providing field traction, while F-2 tyres are front rib tyres providing steering control.
What causes rapid wear of tractor tyres?
Incorrect inflation pressure, prolonged road haulage at high speeds, misaligned steering toe-in, and excessive wheel slippage.
What is Ply Rating (PR) in agricultural tyres?
Ply rating denotes the structural strength and load capacity of the tyre casing.
What tyre pressure should be maintained for field tillage?
Rear tyres typically operate between 12 and 16 PSI in fields to maximize footprint and reduce soil compaction.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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