Originally Posted by
noteon
Excellent information on the Rotor cranks, thank you. I'll study further and will most likely have more questions.
One question now, though: I can't see past the chainguard. Is that a Q-ring? The RS series doesn't come as a single, right?
The oval Q rings don't fit on the RS4X series because the RS4X has unique 114 BCD round chainrings. My RS4X double set came with a standard 53t non-aero chainring outer ring and a 39t inner. My inner 39t ring is sitting in the oem box in the garage waiting for another project/crankset. My single 53t is on the inner position and my cut to match custom made chainguard on the outer.
I'm certain Rotor can answer technical questions better than I
http://www.rotorusa.com/i1-rs4x.shtml or try customer service
http://www.rotorusa.com/contact.shtml. Enjoy the happy knees, extra power, lower heart stress, reduced fatigue, spending an extra 5 minutes explaining what the cranks are after you fold/unfold your Swift frameset a couple times and how you have 27 gears not 9 with the SRAM DualDrive the next time you stop at the market.
For more info
http://www.myspace.com/xootrswift.