DOT race tires typically have a softer, more pliable construction than sport and sport-touring tires, and this could make them more susceptible to damage. To use your example, a softer carcass would likely lead to more rim damage in an impact; the tire would collapse easier. Sport and sport-touring tires generally have thicker tread than a DOT race tire, which would make them more puncture-resistant. As for load, all tires have a load index rating on the sidewall and this is typically consistent across the range of tires. For instance, your Continental RoadAttack sport-touring tires have the same load rating as the company’s SportAttack sport tires. The front tires in 120/70 size have a “58W” load index, which indicates a maximum load of 520 pounds at maximum inflation and a maximum speed of 168 mph. The rear tires in common rear sizes have a “73W” load index, indicating 800 pounds to a maximum speed of 168 mph. The race tires are similar, although in some compounds the load index is actually higher. When it comes to rain, most sport-touring and sport tires definitely offer more and deeper grooves to remove water, along with a higher silicon compound in the tread for better wet-weather performance.