14 lb OZ forged magnesium wheels, and 19 lb forged Compomotives. The tyres on each are different in weight too. On the Compomotives I have Pirelli P's and on the OZ's Goodyear Eagle HP's The overall difference in weight of each is around 10-12 lbs.
I never did any math, but I can light the tyres up in 1st and 2nd with the Compomotives, and in 1st through 3rd with the OZ's. Also taking into account the greater grip(on pavement) of the OZ's, without doing any math at all, there is a world of difference between them.
Don't have any empirical data yet, but when the motor gets back together, I can run some timed runs to put it all on paper.

Squid
WNY Llama Rescue Group