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Originally Posted by wc18
Yes, you will "feel" less power. The larger wheel will cause you to take longer to accelerate to the same speed then before because the 20" wheel/tire combo are heavier (more rotational mass) than the 17" wheel/tire combo. Drag racers say adding 1 lb of rotational mass "feels" like adding 5lb to the weight to the car.
- wei
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to add, 10lbs of weight loss = 1hp regained in unsprung weight (which wheels and tires are). your heavier rims and even heavier tires have added quite a bit of unsprung weight.