... of bias tyres , such as : agricultural tyre ,paddy field high tread tyre,irrigation tyre,desert tyre ,implement tyre , ... and Butyl rubber). Specific size as follows:1,The Agricultural tyre /tire with pattern R1 size:20.8 ... .00-14,5.00-12,4.50-125,The paddy field high tread tyre with pattern R2 size:600 ... 1000R20,1100R20,1200R20,1200R24 ,315/80R22.5,11R22.515, The part of PCR tyre/tire size : 13’,14’and ...