Apologies. When you said steelies, I thought you meant cords showing on the tires. I just realized you meant steel wheels.
So, go for it, but I don't have any experience with the 615 tire.
FORMER Avenging Moderator of the Apocalypse and Leader of the Axis of Oversteer
"I live with fear every day and sometimes, she lets me race."
2002 SVT Focus... Stock