These are aftermarket Mercedes wheels. I used these for winter on my 2008 CLK550. Size are all 17"x7.5". Don't know the offset. Priced low due to overall finish (backside of wheel has chrome starting to come off). Selling at same price as used tires. Recommend powder coating if planning to use year around. These are good if you just need an extra set to get you through the winter seasons. All tires are in great condition.