Ah lemme restate that. The ADR's look like copies of the Advan RG's or the SSR Type C's. If you want light rims, Advan or SSR.
Weight of the SSR's in 15x6 are 8lbs, semi solid forged.
Link
Advan RG's are cast and weigh 11.4lbs for the 15x7 and 12.7 for the 16x7. from wheelweights
Weight of the ADR Ricochet in 17x7 is 19.4 according to wheelweights and are cast.