I didn't realize Surly had a dual single speed cog called a dingle! Unfortunate name. It does seem that the cog is the common problem with all possible solutions, no? Maybe, if you want to stay fixed, and you're already considering a large investment in a custom hub, you could see about getting a custom duo-fixed cog made? Seems like White Ind has the capability already since they do the same for chainrings, they are usable with 3/32" chain which you can get a halflink for, and the combination of eccentric Eno hub plus half-links could be a good solution? Maybe Phil Wood would consider it? If so seems like that would theoretically be cheaper than frame work or a custom hub.
On Wednesday, April 8, 2015 at 10:58:54 AM UTC-7, Patrick Moore wrote: > > The Dingle cog requires a chain no wider externally than one made for 9 > speed cassettes. An 8 lightly but perceptibly brushes the adjacent cog, and > Surly says to use a 9. > > I've used the ENO and it's great, but doesn't have enough takeup; agree > that it is more practical for me than an eccentric bb, from what I've > recently learned. > > As for 2 chainrings -- I'd probably do that if I were completely rational; > but .... > > Hey! I've thought of this before: I could pay Phil to build me a custom > fixed hub with room for 2 or 3 fixed cogs on one side (wheel would have to > be dished, probably). They quoted me $400 for this about 7 years ago. $400+ > is a lot of $ to accommodate a half link, though. > > Patrick "off to the framebuilder!" Moore > > On Tue, Apr 7, 2015 at 12:00 PM, ian m <darkg...@gmail.com <javascript:>> > wrote: > >> I have used a half-link with the WI dual cog, what has been your issue >> with it? >> >> I had this same problem with a Rawland frame that was designed for 650b >> and canti's but was modified for 700c and caliper brakes (AKA the canti >> bosses were not brazed on). The brake pads are maxed at the lowest point of >> the long reach Tektros so I have veryy little room for moving the rear >> wheel. The only option I found, aside from running a true SS, is the WI >> complete dual drivetrain, 35/38 up front and 16/19 in back. Chain length >> remains the exact same and you get two usable perfectly straight >> chainlines. Which has ended up being perfect for me as a flatlands gear and >> a hills gear. >> >> You could also use the WI eccentric SS hub, which I have also had >> experience with and works excellently, and is probably an easier and >> cheaper solution that an eccentric BB >> >> On Tuesday, April 7, 2015 at 9:47:10 AM UTC-7, Patrick Moore wrote: >> >>> I posted this to the boblist, but I'd like opinions from those on this >>> list who don't read the other and who have experience with this problem. >>> >>> I want to modify my '03 Curt Rivendell to better accommodate chain >>> take-up. The long Campy 1010s theoretically have enough room to accommodate >>> as much as a 8 tooth cog or ring difference, but in fact, given the >>> chainstay length and the dropout position, I've had to file the rear of the >>> dropouts considerably, to the point where they looks alarmingly thin, in >>> order to accommodate the even-toothed rings I prefer (46 or 48) and the >>> cogs I prefer. I don't want to change my gearing even by a few ". Removing >>> a link puts the axle too close to the front of the dropout, and interferes >>> with the fender in any case. I can't use a half link with a Dingle cog. >>> >>> 1. Replace the dropout. With a fender, this means using a long >>> horizontal d/o and, in effect, moving it either forward or backward by, >>> say, 1/4", or else fabricating a custom, longer dropout. >>> >>> 2. Somehow reinforce the existing dropout: not quite sure how one would >>> do that. >>> >>> 3. Using an eccentric bb assembly and replacing the d/o with a vertical >>> one. >>> >>> What have y'all found best in such cases? In particular, what are the >>> drawbacks of an eccentric? I hear they are prone to creaking. >>> >>> Do eccentrics need bb shell modification? >>> >>> How much chain can they take up? >>> >>> Do they modify your riding position noticeably? >>> >>> I'm inclined to go with option 1 if I can convince a builder to do it >>> right. But if eccentrics work well without creaking, requiring much >>> maintenance, and changing your riding position materially, one of those >>> might be even better. >>> >>> -- >>> Resumes, LinkedIn profiles, bios, and letters that get interviews. >>> By-the-hour resume and LinkedIn coaching. >>> Other professional writing services. >>> http://www.resumespecialties.com/ >>> www.linkedin.com/in/patrickmooreresumespec/ >>> Patrick Moore >>> Alburquerque, Nouvelle Mexique, Vereinigte Staaten >>> >>> ************************************* >>> *The point which is the pivot of the norm is the motionless center of a >>> circumference on the rim of which all conditions, distinctions, and >>> individualities revolve. *Chuang Tzu >>> >>> *Kinei hos eromenon. It moves as the being-loved. *Aristotle >>> >>> *The Love that moves the Sun and all the other stars. *Dante >>> >> -- >> 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. >> > > > > -- > Resumes, LinkedIn profiles, bios, and letters that get interviews. > By-the-hour resume and LinkedIn coaching. > Other professional writing services. > http://www.resumespecialties.com/ > www.linkedin.com/in/patrickmooreresumespec/ > Patrick Moore > Alburquerque, Nouvelle Mexique, Vereinigte Staaten > > ************************************* > *The point which is the pivot of the norm is the motionless center of a > circumference on the rim of which all conditions, distinctions, and > individualities revolve. *Chuang Tzu > > *Kinei hos eromenon. It moves as the being-loved. *Aristotle > > *The Love that moves the Sun and all the other stars. *Dante > -- 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.
