Quote:
Originally Posted by DreamSign
Yes, you were 100% correct, this is "sprung" weight because it is part of the suspension that interacts with the chassis via springs.
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Tire/ wheel as rotational mass is NOT sprung weight, it is unsprung. Wheel hub and brake caliper are also unsprung weight, but not rotational mass as they are static, obviously.
On the other hand, flywheel is a heavy rotational mass, and it is sprung weight as the entire engine and transmission.
Anyway, lighter wheels/ tires reduce not just rotational mass to help acceleration (as if you gain more power) and braking but also unsprung weight so that suspension reacts quicker to maintain grip. Basic, simple and relatively cheap way to get more out of the car.
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1997 Boxster arctic silver/ red, XNE riveted mahogany/ leather steering wheel & 917-style wood shift knob, Ben’s short shifter, PSE, 996 TB, UDP, stereo/ center console delete, hardtop and speedster humps, daily driver rain or shine or snow!
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