I'd like to know this too.. I don't have an exact answer for you because I have never used them but from what I've read they're pretty much the 2010 390's or the 2011 Arsenal with the 390 ankle strap. So your looking at med/soft flex. This sound about right to anyone that has experience with Romes?
So how does the base plate on the arsenal differ from the 390 ( before vrod)? Is it just the coring on the metal heel hoop or is it differnt all together. I rode the 08'390 and really liked the feel of them. Will the s90 feel like those?