I use the weights in my RC Rock Crawler to enhance the climbing by adding weight to the wheels. I added the weights to one of my sets of wheels. It increased traction at all four wheels.
Pros
I needed some black color, adhesive wheel weights to balance motorcycle tires / rims. These stick well.
Needed weights for a busy Chevrolet service dept but my normal supplier was out of stock. I decided to try these as they were less expensive and my techs all liked them. I now have them on a monthly delivery which also saves me more money!!!