Concur with acap. Dave Quinn gave me 20kg Hagons to start with--much too harsh. We subbed 18kg and still a tad too harsh. Dave's easy to work with, and will provide different springs at no charge--at least once. I'm about 165 not including riding gear, and I don't ride double. Put Olin's on the GS--fantastic piece of kit, but very pricy. If you want to get every bit out of your Dub in the twisties, I'd say upgrade from Hagons to whatever your wallet can afford. If you just want better-than-stock, the Hagon's are fine.