These are a great product, easy to install and effective, but not heavy enough. Still a lot of wheel spin even with chains. Not good for the driveway. I only weigh 155, but I note that folks over 200 have the same problem. The product is great, just not heavy enough. I am not sure how effectively more weight can be done and be installed as easily as these.
Craftsman 30 lb. Wheel Weights is recommended by DHenry