I have these installed on both of my bikes along with the 40% heavier fork springs from ProCycle. They fit with the longer springs with no need for a spacer. Its easy to do and only requires drilling some larger holes in the stock dampening rods. I had bought this set to use on Mrs Trip's bike with the stock springs ... she didn't need heavier springs since she's a lightweight. I would have trimmed the existing spacers accordingly, and then had a tunable set-up with the stock springs. We ended up going in a different direction with her suspension...progressive springs so I'm not going to use these. I think they are about $160 at ProCycle.