Today, most racing doubles have a Q factor of 146-148 mm. Campagnolo is very consistent at 146, others vary a bit. Road triples usually are about 10 mm wider.
For example, our Rene Herse doubles have a Q factor of 142 mm when set up with a 43.5 mm chainline. (I run mine with a narrower chainline, since I usually ride on the – relatively small – big ring, so I get a Q of 139 mm). The R. Herse triple is designed for a 44 mm chainline, and you get a Q factor of 153 mm. If your bike requires a wider chainline because the chainstays aren't optimally designed, then you obviously get a wider Q (and not-quite-optimal shifting). Jan Heine Compass Bicycles Ltd. Seattle WA USA http://www.compasscycle.com Follow our blog at http://janheine.wordpress.com/ -- 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.
