Wide rims, narrow tires, gauges

Hello, I ride 8.5 & 9.5 x 18 wheels on 225/40 & 245/35, so my car logically pulls after every lane channel. Drive Bridgestone Potenza RE050 at the moment, and have thought about switching to 235/40 & 255/35 to relieve the tyre flanks, and when I’m already changing to tyres with soft flanks. Does that make sense at all, or will I have even more problems afterwards with sparrows, because my tires are 1cm wider? Hope you can advise me something, experience post and help me with my decision. Greetings from the CLK forum, Easy_F