"Regardless of the cassette in question, the "big jump" is due to the 53.8% difference between the chain rings."
My jump is 47% between chainrings. That's much bigger than the 27% jump from your 36 to your 46, but it is smaller than the 50% jump from your 24 to your 36. I don't know if I should go mad or not! On Thursday, August 22, 2013 7:07:26 PM UTC-7, Steve Palincsar wrote: > > On 08/22/2013 07:25 PM, William wrote: > > Steve buddy > > > > 1. I would never categorize you in "most people", so you can be > > totally right about your gearing choices without disproving my > > assertion that most people can do just fine with a compact double. :-) > > I make no comment about "most people." I've not done any sort of > quantitative comparison and have no data. Every one has their > individual gearing needs, and it pays to figure out what you need given > your body, your fitness and the terrain in which you ride. > > > 2. This is another datapoint proving that you've been unfairly > > maligned as a Jan Heine disciple. You like cantilever brakes and > > triples. If you were a true Jan-zealot you'd be on centerpulls and > > compact doubles. Steve learns from many, but makes up his own mind, > > people! > > I like centerpulls, too. One of my bikes has Mafac Raids, another has > brazed on Paul Racers. I also like dual pivot sidepulls, in the right > situation. > > > 3. I agree that a compact double with an ultrawide cassette has big > > jumps. What I meant by a "normal cassette" was more like an 11-26 or > > an 11-28 with a 44/30. If you cannot possibly live without a sub 22" > > gear then I agree that a triple provides better coverage. On my > > touring bike I happily run a 3x8 where I need really low gears. > > Regardless of the cassette in question, the "big jump" is due to the > 53.8% difference between the chain rings. That insures that regardless > of the cassette, when you do a front shift you will have a big, big > difference between gears compared to a more typical 10 or 12 tooth > shift. You also have to decide how large spacing between gears is > good for you, and where in the range you like it close, vs where you > like it wider (Patrick has written extensively on his preferences here, > as has Jan; I couldn't live with either Patrick's or Jan's.) > > > > > In general I agree 300% with your approach: Pick your high gear and > > your low gear and design it to cover the space with acceptable jumps, > > keeping an eye peeled for chain line. Double shifts are a lot less > > troublesome to me than you make it sound when my left side shifter > > never has to trim. Slam it against the stop for the big ring. Slam > > it against the stop for the small ring. > > Trimming isn't a problem for me (as a bar end shifter user). If/when I > do it, I hardly even pay it any conscious attention. What you have to > go through to do a double shift and stay reasonably "in sequence" is > important to me. I would go mad if every time I needed a gear below 40 > inches I'd have to cross over and upshift 3 or 4 at the same time, and > I'd go mad if every time I shifted to the small ring it felt like I'd > dropped the chain, or if every time I shifted from the small to the > large chain ring it dropped my RPMs by half and doubled the pedal effort. > > > -- 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.
