Sorry, I don't have any scales to hand. Wife wont let them in the house!
Honestly when removing the Austin to try these on the car, the reps felt slightly lighter. They are JWL and VIA stamped, see pic.
I am more than happy to run these as winters and see how they go.
I am not fitting till i get the centre caps though, which will hopefully be sometime this week. Can't have them fitted looking unfinished!