Load index Question!

Hi together, I drive a Passat 3BG V6 2,8L 4 Motion and would like to drive 20 inches next summer! VA 8,5×20 HA 9×20 now I have read that will be pushed in various forums that is absolutely a 245/30/20 because of the load! Now I have calculated this time, my Passat has an axle load front of: 1090 KG and rear of 1080 KG, since I would rather drive a 235/30/20 ( avoid the fender conversions ) the LI 88 would have to be enough after all or I am wrong! 235/30/20 LI 88 – LI 88 = 550 KG that are again 1100 KG, so it would have to be possible to drive 235/30/20 or ?? thank you already for your help