Machan let me explain u in sinhala, becoz I can explain this matter in sinhala better than kadda.
mehemai kollo 13 inch tire rims ekka oyage car eke godaak durata tiyenna ona 165/60 hari 175/70 wage tires. itin oya 14 inch rims danava nam tire eke usa (profile) tikak adu karannama ona, mokada oya originala settings walata amatarava 1 inch walin rim eka loku karama kalin tibbe usa (profile) wadi tire nam, tire ekai body ekai atara tiyana ida adu wenava.
etakota oya car ekata godak bara dammoth, tire eka body eke gawenna puluwan, bara daala yaddi walaka ehema watunot aniwa wadinava.
rim eka loku karanavanam(1 inch ekakin) tire eke usa aniva eka size ekakin adu karanna. dan tire eka profile eka 75 nam 14 inch dammama 60 hari 65 hari danna.
(mama me katha kare 13 inch 14 inch karana eka gana vitarai. ita wada loku rim ekak danava nam yhawa wada tiyanava karanna)
ehema nattan 1 inch nisa tibba tirema danna, habai bara daala car eka paath weddi parissamen.