Too wide by only 1.96mm or less on the diff side with excelerate rims, by my calculations with my good eye(..lol..)... It might be good with other offset rims...This issue is better solved with better offset rims(if available) or run two millimeters shorter on the left side(ouch): associated F1 ball diff kits might be very hard to get...Best to change the Roar Rules to 196mm or 200mm F1 width just like the 1S/13.5t rule....lol....None of the tracks tech F1 rear width anyway...