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Wheels are not just unsprung weight, they are mass that needs to be rotated as well. The driven wheels feel the effect of the mass.
I remember some time back reading a tuning magazine where they had some modded honda on the dyno. Car put down about 150whp. Then they put on bigger heavier wheels/tires (same rolling circumference) and the car lost 8-10 whp.......
Remember, bigger brakes also need to be accelerated, it is not just wheels...
Cheers
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997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3
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