>>1380338https://janheine.wordpress.com/2018/07/19/how-wide-a-tire-should-i-ride/https://janheine.wordpress.com/2013/05/23/tire-width-how-much-difference-do-a-few-millimeters-make/amp/Personally I say as big as your frame can fit at the highest tpi you can find. If you can do 700x35 120tpi tires you will be thankful. The amount of air gets exponentially larger with each increase in tire width, so going from 23 to 28 is nothing like going 32 to 35