[RKDinOKC]

Good Morning.

Seem to remember a test done by one of the magazines on plus sizing wheels. Going from 15" to 16 17 18 and 19. They were for the most part able to keep the overall diameter of the wheel tire combination the same by going to a lower profile even though with larger rims wider tires were used. Going from 15 to 16 and 16 to 17 .1 second was lost 0-60. But .1G was gained in lateral grip. Going from 17 to 18 the acceration stayed the same and lateral grip still increased .1G. They said it was due to not being able to get the same tire compounds as the smaller rims. Going from 18 to 19 the same .1 second loss and .1G increase. With each .1G increase in lateral grip there is also a slight decrease in slip angle due to the lower profile which should give a crisper steering feel.

Going with lower profile steering should feel a bit more responsive (the increase in lateral Gs), but the ride will be more harsh like you have put on stiffer springs and/or dampers. And yes, acceleration will be a tad slower, but braking should take just a bit more pressure initially to overcome the rolling increased rolling inertia.