Quote Originally Posted by chituntang
615 is the best non- R compound tire you can get.
I would respectfully disagre with that. The RT-615s were the best non-r comps that one could buy, and used to THE tire to have ST autocross classes. Now, I think the hot tire is the new Bridgestone RE01.

Kumho and Toyo are both slated to release new tires to compete with the Bridgestone for ST class supremecy.

Oh, and to answer the OP's question, no, the RT-615 is not a drag radial. Nor does Falken make a drag radial.