I think I weighed my oe 288 around 16 lb, close to Brembo, on a bathroom scale. I've searched and searched for alum hat 288 5x112 but no luck so farI know, the lightest I've found at reasonable prices are from Brembo, at 7.3 kg for 288mm and 8.6 kg for 312 mm discs. ATE Powerdisc seem to be close as well.
Thanks I couldn't find reliable info on ATE Power discs. Do you know the weight for the 288mm disc from ATE ?