Guess Siji: Hitungan miturut jumlah aditif karet lan pangisi kanthi jumlah karet mentah udakara 50% .
Guess 2: In 2001, the tire branch accounted for a total of 83.77 million tires of the tires of the member tires, equivalent to 63.02 million tires of 9.00-20-14PR. According to this share calculation, in 2001, the national tire production value was 110 million, equivalent to 79.21 million tires. Ing taun 2005, total nilai ban yaiku 125 yuta, padha karo ban 91, {000 ban. Adhedhasar iki, panjaluk kanggo macem-macem aditif karet ing pekerjaan ban diitung.
Guess 3: Ing taun-taun pungkasan, ban truk radial baja kabeh diluncurake luwih cepet, lan macem-macem aditif karet anyar wis digunakake luwih akeh . 00R20 minangka conto kanggo ngasilake tambahan karet.