ok this is the thing i have 18 inch rims 41 pounds with tires on proxe 4s and i have stock sh wheels 44 pounds with bridgestone s 03s with the 18s i launch better less spin, with the 16s i spin more but but i think i am getting a better top speed .... i am going to the drags sat should i go 16s or 18s ???
thanks for your help

 

i would think 16s due to less rotational mass. what this exactly means, i have no idea.