Originally Posted by GregW / Oregon
"In the standard version, the cast 18" 'M' double spoke wheel (style 260) is available for the E92 M3, with the forged and polished 19" 'M' double-spoke wheel (style 220) available as an option. These are weight-optimized M3
light alloy wheels.
The tyres are also specifically selected for the M3. The Michelin Pilot Sport (PS2*) is currently fitted."
BMW Aftersales Training Information
So, yes, it is likely they weigh about the same, with the forged probably being stronger.
BMW has made a lot of hoopla over how light their wheels are.....I believe the 18s are around 20 lbs or slightly lighter.......yes, sick. Before this car the only really light weight wheels came from the aftermarket.
BTW: nice write-up swamp.