The SC-2 is a very wide tire but it seems has a fairly stiff sidewall thus works pretty well on a 7" rim but would still be better on a 7.5 or 8" wide one.
They are not the all out highest performance tire but a very good tire with longer tread life, depending on use and maintenance, a very good value for those that are OK with giving up a bit of grip for the savings which can be considerable as they cost much less and will last longer as well, in the end maybe half the real price of the super grip tires over time, or even less!
Going from stock rubber bands to wide 16's on a relatively narrow rim and not noticing that much change in turn in would indicate a stiffer sidewall, enjoying the added all around performance and ride improvement is the biggest reason for low weight wheels and tire setups.
The Bridgestone are not at the top of the heap in performance tires, the Mich PS-3 AS is one of the top AS tires and as fast as some summer only tires, rides like a dump truck but so do the Bridgestones.