Blackhawk 215/55 R17″ seems to refer to a specific tire size and model. This tire size indicates the following:

“215” refers to the width of the tire tread in millimeters.
“55” refers to the aspect ratio, which is the ratio of the tire’s sidewall height to its width.
“R17” indicates the tire is designed for a wheel with a 17-inch diameter.
As for “Blackhawk,” it may be a brand or specific model of tire, possibly known for performance, durability, or other features. However, specific details about this tire model, such as tread pattern, speed ratings, load index, and any special characteristics, would need to be obtained from the manufacturer or retailer.

When considering tires, it’s important to ensure that they are suitable for your vehicle and driving needs, and that they meet safety and performance requirements.