986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Thinking of going to 18s. Will car essentially be slower from the bigger wheels?

Adam · 01-02-2007, 10:01 PM

It mostly depends on the weight of the wheels. If the 18's are the same weight as the 17's then there would be very little difference. Since the rubber is thinner on the 18's the applied force to the ground would be almost the same bcecause the overall height of the wheel/tire is comparable to the 17's. As mentioned earlier, the difference in rotational mass would be neglible with such a small change in size.

01-02-2007, 10:01 PM	#5
Adam Registered User Join Date: Nov 2003 Location: Illinois Posts: 3,033	It mostly depends on the weight of the wheels. If the 18's are the same weight as the 17's then there would be very little difference. Since the rubber is thinner on the 18's the applied force to the ground would be almost the same bcecause the overall height of the wheel/tire is comparable to the 17's. As mentioned earlier, the difference in rotational mass would be neglible with such a small change in size. __________________ '03 3.2L GuardsRed/Blk/Blk---6Spd Options: Litronics, 18" Carrera lights, Bose sound, Painted to match roll bars. http://i100.photobucket.com/albums/m...Mautocross.jpg Last edited by Adam; 01-02-2007 at 10:04 PM.