I think Tabasco means will this be mated to an equally upgraded set of forks! There aren’t 2 rear shocks on an ST , so the rear shocks don’t have to be matched to work together ..
A ridiculous amount of improvement can be had by respringing the rear shock. This is the route I took before I found a used Ohlins. Racetech has the bits you need to go on either end of the spring. I went with Eibach 08002251000 as the spring.
Interestingly, when I put 250# into the spring calculator, it returns the second-highest spring.
I'm stoked they sell the shock collars; that was the one piece I couldn't figure out before. The next step up for the Eibach springs is the 0800.250.1200, which is the equivalent of the strongest spring on the RaceTech site.