On Wednesday, September 24, 2014 2:04:10 AM UTC+2, Peter M wrote: > > I thought since some of the Rivendell models have bowed chainstays you > could only have so low of a q factor. Or I might be totally wrong too. >
The chainstays are of course setting the limit for the crank arms. But with chain rings mounting inwards on the crank you would be able to vary the chainline and Q-factor independently from each other with any chain ring combination. With such a crank as I would like to see you first choose a bottom bracket that gives the chainstay clearance you want on the bike in question (as tight as possible for most), then set the desired/correct chain line using spacers for the chain rings. Johan Larsson, Sweden On Sep 23, 2014 7:20 PM, "Johan Larsson" <seven....@gmail.com <javascript:>> > wrote: > >> If I were to design a crankset I'd make it with chain ring bolts only >> from the inside, like old SunTour XCM cranks but with a quite narrow gap >> between the outer chain ring and crank arm. That way it's easy to run it as >> a wide double (48/28 for example) with 110/74 or any choice of available >> chain rings and still having a narrow Q-factor. >> >> It's too bad Grant seems to have given up on striving to keep the >> Q-factor low. (?) As far as I can tell, you wouldn't lose anything with >> such a crank, there would only be advantages. If you'd need a wider >> ring-crank arm gap for some mtb style bike with wide tires and a wide cage >> front shifter you can add spacers and run it with three rings. Or one. Or >> four. If you have an old road bike you can keep it lean and narrow and run >> it as a double with almost an unlimited choice of chain ring combinations >> and a Q-factor in the 130 mm range, still using standard chain rings. This >> winter I'm hoping to be able to make such a crank for myself, since I >> finally have access to a lathe and having collected many old cranks I can >> modify and take parts from. >> >> Johan Larsson, >> Sweden >> >> -- >> You received this message because you are subscribed to the Google Groups >> "RBW Owners Bunch" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to rbw-owners-bun...@googlegroups.com <javascript:>. >> To post to this group, send email to rbw-owne...@googlegroups.com >> <javascript:>. >> Visit this group at http://groups.google.com/group/rbw-owners-bunch. >> For more options, visit https://groups.google.com/d/optout. >> > <http://www.pinterest.com/pin/create/extension/> -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at http://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
