... 3 We are a manufacturer of tyres in China: Including agricultural tyres, industrial tyres, bias truck tyres, forklift tyres, etc. Our products hold ... Butyl rubber). Specific size as follows: 1,The Agricultural tyres with pattern R1 size:20.8-38,18. ... .00-7,3.50-8 etc.2,The Agricultural tyres with pattern F2 size:11.00-16,11L ... -12, 4.00-8 etc .4,The Agricultural Tricycle and Auto tyre/tire with RIB size:6 ...