[Tofurky]

Originally Posted by strat61caster

What size 71R's? What you say makes sense once you get down to 200TW super aggressive tires, especially if you go wider than stock.

I've got slightly softer rates than yours but went and pounded around on my MPSS street tires (OE sized) this weekend and it was slippery to say the least. I think the same would hold for the less sticky 200TW track tires (Dunlops, Hankooks, Bridgestone RE11, BFG, etc.) if kept around OE sizing 215-225. 400# would likely work out well for those tires for someone who could drive it, but it would seem to me to be an edgier setup than using some softer spring rates.

Since OP provided no context we won't know if the 400# starting point will be too much, not enough, or just right. Which could be a selling point for the FA/Feal's given how they're sold as customizable.

I run 245/40/17 toyo r888 on 17x8