Still have my Hyperpro. The ride quality sucked with the stock spring. If you use a lowering link you get lower but I suspect not much of an improvement in ride quality. I would have sold the bike by now without the Hyperpro spring, I have some rough roads around here. I am not sure how it work's on a track or with an aggresive rider, I never go more than 20 over the limit. The bike is just more planted at all times. Spring was available in black.