Jim: In the past 2 years I've built up a few sets of Sturmey Archer 8 speed drum hub wheels... I really like these hubs, and so far the quality of these hubs has been excellent, so good luck with yours. I plan to do something similar as what you're doing, so I'd love to hear your experience with this setup.
One other challenge I've had with this (and other internal geared hubs) is the shifter... often you're stuck using whatever shifter the manufacturer provides, which can seriously limit your bar (and hand- placement) options. Companies like J-Tek have introduced 8-speed bar end shifters (kudos), which pull the right amount of cable to be compatible with the Alfine and SA 8-speed hubs. Measuring the amount of cable pull (if not already avail from the mfr) should be fairly simple to measure, and with enough training (and mashed internals through trial and error) I suppose a person could train oneself to friction-shift an internal geared hub. So here's a shout out to all would-be inventors and machinists out there (or Google search experts, in case I'm simply behind the times). The world needs an inline universal cable-travel gadget (similar to the Problem Solvers Travel Agent) that can be set to pull a variable amount of cable, depending on number of gears, manufacturer, etc. This should enable you to use whatever shifter you like with whatever drivetrain, internal or external, Campy, Shimano, SRAM, SA, you name it. Oh, and while we're inventing these things, why not invent an inline cable lever (not a barrel adjustor) that easily and quickly allows for derailleur trimming for index shifters (especially front derailleurs)? To all who provide solutions to these nagging problems, I wish you a life of great fortune and happiness.... thank you. BB On Sep 22, 3:19 am, James Warren <jimcwar...@earthlink.net> wrote: > Thanks Philip. > > I'm considering this 5-speed hub for the QB: > > http://www.sturmey-archer.com/products/hubs/cid/4/id/34/specs/1 > > If I'm reading it right, if I set this up with a 22 tooth cog in back, the > lowest gear will act like that divided by .625, in other words, the lowest > gear in back will act like a 35 tooth cog. > > Combine that with my functioning front derailleur and triple crank up front > (24-36-48) and consider the gear range... > > ...is all of this too good to be true? > > -Jim W. > > > > -----Original Message----- > >From: Philip Williamson <philip.william...@gmail.com> > >Sent: Sep 21, 2010 11:54 PM > >To: RBW Owners Bunch <rbw-owners-bunch@googlegroups.com> > >Subject: [RBW] Re: Internal 3-speed QB question > > >The Sturmey S3X is supposed to accept threaded freewheels as well as > >splined cogs. They come in 120mm spacing, and some sexy colors (not > >green). > >The "Quickbeam Supertype" setup would be an S3X and a Schlumpf, of > >course... > > > Philip Williamson > >www.biketinker.com > > >On Sep 20, 10:39 pm, CycloFiend <cyclofi...@earthlink.net> wrote: > >> on 9/20/10 9:45 PM, James Warren at jimcwar...@earthlink.net wrote: > > >> > I'm looking for information on Shimano 3-speed internal hubs with the > >> > following idea in mind. In the following pictures: > > >> >http://www.cyclofiend.com/Images/rbw/rr36_pg27.jpg > > >> > the rear derailleur shown is not functioning as a rear derailleur. There > >> > is no > >> > cable attached, and the derailleur is only there to take up a lot of > >> > slack so > >> > that I can have vastly different chainrings up front shifted with a front > >> > derailleur. Right now, the bike has three rings in front, 24-36-48, so > >> > the > >> > bike has three gears total. (In the photo, there are two gears with a > >> > pants-guard. This set-up has worked fine whether as a 1-speed or 2.) > >> > What I would like to do is get a bit of gear-shifting in the back > >> > through use > >> > of an internal 3-speed hub. I would like to make the bike an internal > >> > shifter > >> > in the rear but still retain its 3-chainring derailleur system in the > >> > front, > >> > for a total of 9 gears (3x3). Is there any reason that I couldn't use an > >> > internal 3-speed hub, like Shimano's, but while using this hub, still > >> > have it > >> > work with the dummy derailleur mounted as shown in the photos so that it > >> > takes > >> > up slack and allows me to still do wide range shifting in front? > > >> > I realize this is a bit complicated (due to rear spacing and lack of > >> > derailleur hanger in rear) and I'm trying to research it myself, but any > >> > pointers would be appreciated if it's not too much trouble. > > >> You've already done most of the heavy lifting on that system. > > >> Since you are sticking with a coastable setup, there shouldn't really be > >> that much of an issue. You really just have the same setup, with differing > >> ratios which don't change any chain tension or angle. > > >> There is the spacing issue - 120 mm, which may nix the Shimano 3 speed (and > >> I think those were coaster brake models, but I'm not sure). But, S-A stuff > >> can be found that way, to be sure. There's probably no reason you couldn't > >> run a 7 or 8 speed hub, if it was spaced correctly. > > >> It would be problematic to run the derailleur with a fixed hub like the S-A > >> S3X. Derailleurs/tensioning devices and fixed setups are generally thought > >> to be Bad Ideas. AASHTA > >> -http://www.sheldonbrown.com/singlespeed.html#tension > > >> You're really just using the arm of the rear derailleur for tension. And > >> for the range you are running, I don't think you could drop back to a Paul > >> Melvin. But, if you widen your gearing aft, maybe you could run narrower up > >> front... > > >> (For those looking to mount a derailleur on a tab-less fork end, you just > >> need to find one of these - http://tinyurl.com/derhanger) > > >> It seems like you are really most of the way there, right now. > > >> - Jim > > >> -- > >> Jim Edgar > >> cyclofi...@earthlink.net > > >> Cyclofiend Bicycle Photo Galleries -http://www.cyclofiend.com > >> Current Classics - Cross Bikes > >> Singlespeed - Working Bikes > > >> Gallery updates now appear here -http://cyclofiend.blogspot.com > > >> "Maybe a bike, once discarded, pines away year after year for the first > >> hand > >> that steered it, and as it grows old it dreams, in its bike way, of the > >> young roads." > > >> -- Robert McCammon, "Boy's Life" > > >-- > >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-bu...@googlegroups.com. > >To unsubscribe from this group, send email to > >rbw-owners-bunch+unsubscr...@googlegroups.com. > >For more options, visit this group > >athttp://groups.google.com/group/rbw-owners-bunch?hl=en.- Hide quoted text - > > - Show quoted text - -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. 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