Quote:
Originally Posted by aerohead
I've only seen the argument that, the 'smaller' wheel/tire combo is better aerodynamically, with lower 'windage'/ ventilation drag.
EXAMPLE:
Hyundai IONIQ 6 SEL & Limited, with 20" wheels = Cd 0.246
Hyundai IONIQ 6 SE, with 18" wheels = Cd 0. 219
A 12.3% difference in Cd.
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One of our members is presently experiencing range loss on his Genesis GV60, because of the 'larger' wheel/tire combo.
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The 'slightly-convex', 'closed' wheels on GM's 1987 Sunraycer demonstrated zero ventilation drag at all, at crosswind ( yaw ) angles below 15-degrees.
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Well that’s nice to know it helps drag too
I plan on getting the awd Prius and it takes a 2 mpg hit for both city and highway versus the front wheel version
Switching from the stock 17s to some after market lighter 16 inch wheels should help get back some of the city driving mpg and I guess it’ll help with highway too. Not to mention I’d be doing fully enclosed custom aero caps on the 16s