... Strength8.0Mpa, Elongation 380% 2. Sizes 9.5-24, 8.3-24, 9.50-20, 7.50-20, 6. ... 50-20, 4.00-12, 6.00-12, 4.50- ... 14, 5.00-14, 5.00-16 ... , 5.50-16, 6.50-16, 5.00-15, 18.4-30, 18.4-34, 16.9-28, 18.4-26, 11.2-24. 3 ... . Materials both AGR natural rubber inner tubes and AGR butyl rubber inner tubes. 4 ...