solid tires meets the standards TRA in USA,ETRTO in Europe,and JATMA in japan. Solid tire 4.00-8 ,15*1/4-8 ... .00-20,11.00-20,12.00-20. Pneumatic shaped solid tyre12.00-24,1400-20,1400-24,17.5-25 ... ,385/65-24,15-20,18.00-25. Press-on solid tire10*5*61/4,10*5*61/2,101/2 ...