I'm with Patrick that your Quickbeam should not and in fact never feel sluggish--something's off. My partner has a QB and says that it's like wearing a silk chemise instead of a wooly ski sweater when comparing it to her trusty Surly LHT.
I have what I refer to as a faux QB that I set up before the last run of silver QB's that included little frames. My faux QB is a riv protobleriot frame set up with an Eccentric Eno hub and a Dos Eno freewheel (also a White hub on the front). One thing I would add, in addition to the good discussion of tires and chain tension, is sneaky tire clearance. I went from Maxy Fasties (650B x 33) to Soma Xpresses (650B x 38) and everything looked great but the normally sprite little bike felt alarmingly sluggish. After calling a bike mechanic friend and taking a pit stop at a most excellently placed bike shop on my morning commute, we found the culprit: the inside fender bolt on the brace between chainstays ('inside' meaning between the fender and the road surface of the tire) was rubbing on the tire – but it was totally not visible. Replaced the regular bolt with a button-headed bolt and voilá! Mystery solved! (And I felt pretty stupid, but live and learn.) The shop also adjusted and cleaned the Dos freewheel, which also felt great. One thing I came to understand is that your Dos *should* have a pleasant click-click-click when you coast. It had gradually gone away without my really noticing it and once it was adjusted and cleaned, the click came back and it felt better. (Not to stir up an old off-topic thread, but it's just like an old BMW motorcycle--the valves *should* tick-tick-tick when they're in adjustment). With two White hubs in proper form, it coasts wonderfully. -liesl clicking happily along between minneapolis and st paul -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to rbw-owners-bunch@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.