On Mon, 2013-07-01 at 09:09 -0700, Mike Schiller wrote: > It's the access to wide range cassettes that's made triples somewhat > obsolete. Using a 44-28 or 46-30 crankset with a 11-30 up to a 12-34 > cassette gives one a pretty good range on a road or country bike. > Heavily loaded touring bikes being probably one of the only > exceptions although it kinda depends on the terrain you ride ... or > your physical condition. >
OK, let's take a close look at the gearing you get with a 30/46 crank and an 11-34 cassette (an extremely common combination): 112.9 73.6 95.5 62.3 82.8 54.0 73.1 47.6 65.4 42.6 59.1 38.6 54.0 35.2 49.7 32.4 44.4 28.9 36.5 23.8 Straightforward and simple sequential shifting... right up to the point when you run out of gears and have to cross over to the other chain ring. To avoid cross-chaining, on the 30 you'll have to cross over somewhere between 47" and 62", and when you do shift over to the 46, you have to either manage a 20" step up (enormous!) or you'll have to downshift at least 3X in back to have a reasonably close step up. Likewise, ad it gets steeper as you're riding along on the 46T ring, somewhere between 54" and 44" you're going to have to cross over to the 30, but when you do you're going to experience a 20" drop, which is going to feel just like you dropped the chain. To make it a reasonable step you're going to have to upshift 3 or 4 times. To me, that does not seem very "simple." > > ~mike > > > -- > 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/groups/opt_out. > > -- 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/groups/opt_out.
