As I said before... this is an autoX car, so not apples: apples with club racing.
BUT, front rates @700# are plenty to control roll and are in line with or higher than what you'd see on an IT version of the same car. I mention the funky setup as it relates to street tires sometimes benefitting from a setup that is waaaaay off what you'd see with an R-comp. Optimizing setup for street tires may be close to or far from what you'd run with R's but it's doubtful that it'll be the same.
Sidebar on the high camber setup: the 195/50 R1R is referred to as the "Pixie Dust" Toyo in that it uses a "soft" compound down to the cords vs. a "soft then hard" dual compound used by most of the other size R1R's. It also has a different carcass construction... truly a on of a kind type tire in many ways. If you were to look around an SCCA Solo Nat's grid, the guys at the front of the field are all running crazy camber and super low pressures. If you were to move to a different tire, you'd be running higher pressures and standing the tire up (more conventionally).
