Hello, The studs are metric, 12 x 1.5, they should be torgued to 75 foot pounds. 1/2 studs are 100, and just so you know those old 7 / 16 studs are 65. Those specs are from when I sold wheels and tires for years. The makers on the studs, wheels, and tires had those settings.....
Thanks,
Dave, Northern Ohio Legends