Color me slow or weak or whatever, but when I ride my bombadill in the open spaces its more like the small ring is the default and the 40 is just for downhill. That said I still think the chain line is perfectly acceptable without a longer bb.
On Jan 22, 9:41 am, William <tapebu...@gmail.com> wrote: > Re: chainline. > > You normally try to center the middle ring on the cogset when you run a > triple. so with a 9 speed cassette, you'd line up the middle chainring > with cog #5 > > If your 24/40/chainguard setup is going to be ridden as a 1x9 plus granny > (as most people do), then leaving your BB alone is actually precisely the > right thing to do. Center that 40 on the #5 cog and all nine are available > to you. The only no-no gears are the 2 or 3 small cogs when you are in the > small chainring, gears that nobody needs anyway. This is one of the cases > where doing it the easy way and doing it the right way might be the same > thing! :-) > > > > > > > > On Monday, January 21, 2013 8:51:28 PM UTC-8, ted wrote: > > > I always thought it was odd that small rings were al and big cogs were > > steel. Seems like if you don't want al cogs for >25 teeth you would > > want steel rings for the small (say <36) rings. Same # of teeth means > > same load, same wear, very similar weight. > > > On the bb front, converting a triple to a double using the middle and > > small rings should mean you need a longer bb to keep the spec chain > > line. Not that I bothered about that, but ... > > > On Jan 21, 8:29 pm, Garth <garth...@gmail.com> wrote: > > > With my Bombadil a 24t ring is as large as I could go with needing a > > longer > > > BB using a 110mm Tange. And yes .... SS is the only way to go for the > > > small rings. -- 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.
