I am guessing the RST will be more maintenance free and easier to service. The inverted Fast-ace may be more likely to develop problems like blown seals and oil leaks due to the usd design but maybe smoother/plusher in use. , but agaiin, this is just guessing. I'd probably take a punt at the Fastace.litespeed said:I know some have used the Fastace rear (scooter) shocks but know nothing about their forks. Of course RST isn't top of the line either so I'm wondering if this is a crap shoot? Should I let a flip of the coin decide for me? Any positives one way or another out there?