I threw some of the spare Freewheels I have laying around on my scale, SORRY, it is in OZ...it is what it is...big difference is, the more gears you have, the more they weigh....BIG SURPRISE!

Shimano MF Zo12 5 speed 14-28 13.5 oz
Regina Corsa 5 speed, 13-26 13 3/4 oz
Shimano Sante' 7 Speed, 12-23 14 1/4 oz
Shimano MF Zo12 6 speed 14-28 15 1/4 oz
Shimano UL 7 speed 14-28 17 oz
Sachs Maillard 8 speed 13-30 20 1/4 oz