On Sat, 2010-05-29 at 07:08 -0700, jandrews_nyc wrote: > Which brings me to my question...as I'm unsure of how to arrange the > crankset and what cassette to use in the back. > I would like to use a 13-30 7speed cassette but am worried about the > rear derailleur being able to handle that. > so maybe a 12-28...but then what up front? I'm more concerned with > commuting, riding out of the city on occasion which includes hills, > carrying a modest load, etc. I certainly don't feel like using > anything bigger than a 48t up front and based on how I would like this > bike to ride..I'm feeling something like a 44t / 28t compact double.
According to Sheldon, every [I assume he meant current production] short cage rear derailleur can handle a 30T big sprocket. 7 spd 13-30's very nice indeed; that's what I have on my touring bike. Figure out what high gear you want and what low gear you want, then experiment with Sheldon's gear calculator http://sheldonbrown.com/gears/ to see how best to achieve those values. I happen to like a high gear of 96-100" and a low (not counting the granny) of around 31". With a 38x650B wheel, as I have on my touring bike, 36x48 rings will give me that range with the 13-30 G cassette. 36x48 is very common on 110 bcd cranks and shifts extremely well with most front derailleurs. An added bonus: using the 7 spd cassette on a 135 hub with a spacer lets me use all 7 sprockets on the 48T big ring. -- 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-bu...@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.
