... mmply rating2PR ,4PR ,6PR.tread patternquadrel,block,lug.etctyre&tube materialnatural rubberrim materialmetalrim colourgreen,red,yellow.etcbearing typecarbon steel ... manufacturer of many kinds of tyre , tube , pneumatic rubber wheel , solid wheel , wheel barrow , hand truck and hand trolley .2. rubber ... our products , please contact with us . pneumatic rubber wheel and tyre -- 8"*2.50-4