Hey Patrick, My recollection of my monocog was that the freehub had room for three cogs. I think there were spacers on the hub that covered up most of the free hub - remove the locking and you can do adjust the spacers as necessary. If yours is the same, then you could just keep that wheel and put the additional cogs onto it.
And, in case I wasn't clear in my earlier response, I think there is plenty of adjustment room in the disc brakes to accommodate the rear axle being adjusted in the dropout. -Wes On Tuesday, October 17, 2023 at 10:44:19 AM UTC-7 Patrick Moore wrote: > That's interesting, and after blundering into a few search result pages > about money markets and currency conversion I got: > > http://www.monebikes.com/read-me/ > > But he says nothing about adjustable chainstays, > > Still, he does talk about weird possibilities like 3" tires and drop bars, > so I must investigate. > > Really, though, to conclude this question, it seems that I can either have > a very simple bike with disc brakes as long as it's a single speed, or I > can accommodate 2 cogs using some niche, complex technology. I think I'll > either settle for a fixed drivetrain (no rear brake, no problem) or get off > and walk. Rear rim brake not option since I want to use disc rims. > > On Tue, Oct 17, 2023 at 8:44 AM Coal Bee Rye Anne <lionsrug...@gmail.com> > wrote: > >> I have no personal experience with single speed disc nor Rocker/Slider or >> any of the existing dropout configurations being discussed other than >> keeping a mental catalogue and casual interest of such things as I discover >> them... but what about telescoping chainstays? >> >> I recall seeing a few interesting options including a build that Rick >> Hunter did with a bottom bracket positioned wingnut to adjust chain tension >> with a form of telescoping chainstay (I forget what that particular bike or >> design was referred to but I think it had a rigid fork, 26+ tires, disc >> brakes, upright riser Hunter bars, and a cow pattern custom frame bag... in >> case that helps ID it or dig something up for further review from the >> interwebs!) >> >> Another is the design currently used by Cjell Mone of Mone Bikes referred >> to as the Mone Changer. I couldn't find an actual page discussing or >> highlighting the chainstay design itself but believe he builds them into >> various frames as requested. Here's a snippet from the FAQ page on his >> site. >> >> How do I work them Monē Changer dropouts? >> >> - Remember, there are 5 (not 4, don't forget the caliper adaptor ones) >> bolts to loosen. To lengthen, sit on the saddle and hold the rear brake, >> give a couple gentle bounces...that should do it. To shorten, get your >> chain started on your single speed cog and chainring and pedal it around. >> straighten the tire in the chainstays and tighten 6 bolts. If you're >> running gears your penance is putting the bike in the stand, throwing a >> foot on the BB and pulling the rim to the front. >> >> >> Since you are going the custom route for this hypothetical bike I figured >> I'd add these possibilities to the mix : ) >> On Sunday, October 15, 2023 at 6:12:06 PM UTC-4 Patrick Moore wrote: >> >>> Thinking out loud; help me clarify my thoughts. >>> >>> I think of devising a Monocog replacement, with 622X76/29X3" wheels, but >>> instead of a mono cog, with a duo cog. This hypothetical bike would have >>> disc brakes. I don't want to use a chain tensioner, and I prefer to take >>> advantage of the greater gear ratio differences between cogs of different >>> sizes compared to rings with the same tooth differences, and of the >>> consequent smaller axle movement required to adjust chain slack, so the >>> multiple cogs would be in the back and not on the crank. >>> >>> On my beloved 1999 Joe Starck Riv Road Custom fixie I use a 17/19 Dingle >>> on a Phil hub with a QR axle; it's very easy to stop, flip the QR lever, >>> move the chain, align the wheel, and tighten the QR. >>> >>> That's what I imagine for the Monocog replacement. >>> >>> 1. Disc brakes. But this bike would have disc brakes. I'd probably not >>> need more than a 2-t cog difference, but will your typical caliper/rotor >>> setup accept the 1/4" axle movement? (1/8" of axle movement is required -- >>> so they say; I've never measured it and take it on faith -- to accomodate a >>> 1 tooth sprocket difference.) >>> >>> 2. Two cogs. How to get 2 cogs onto a suitable "ss" hub with a >>> freewheel. The DIngle isn't made anymore and in any event wasn't made -- am >>> I right? -- with 2-teeth gaps. The Monocog has a freehub designed to take 1 >>> single Shimano-spline-type cog; there's no room for a second cog. >>>What >>> options does one have to get 2 cogs with a 2-tooth difference onto a hub >>> suitable for a QR axle? >>> >>> I realize that I could just use an old 7 speed Shimano freehub, and I >>> might end up doing that, but I'd prefer to have a hub that does not require >>> a wide stack of spacers. >>> >>> 3. Axle type and dropouts/trackends/thru-axle holes. I know that long >>> forward-facing horizontal dropouts, a QR axle, and a hub with 2 cogs on 1 >>> side allows very easy manual shifting, as this sort of shifting goes. I am >>> also pretty sure that a good builder can use 135 mm OL spacing and still >>> give me the stay clearance I need for true 3" tires, so I'm inclined to >>> stick with this very old-fashioned wheel attachment method. >>> >>> But if there are other wheel attachment methods that allow you to easily >>> move the chain from one cog to another, I'd be interested to learn about >>> them. Sliding dropouts? >>> >>> Are there any other things to consider ? >>> >>> Thanks, Patrick Moore, who had a nice ride to church and back today on a >>> pretty Fall day riding the Monocog with 72 mm tires and a single 65" gear >>> despite the bosque trail sand and the rear tire knobs occasionally >>> "whisping" on the chainstays (I fixed seatstay clearance with a hammer). >>> The Silca Impero with Campy head and the Road-style BB7s pulled by non-aero >>> DC levers are ironic but in fact work very well. When braking from the >>> hoods you simply pull from a bit lower down on the lever; and the Impero's >>> fat barrel moves lots of air fast into low pressure tires; 13 psi this >>> morning and it could have been lower. >>> -- >>> >>> ----------------------------------------------------------------------------- >>> Patrick Moore >>> Alburquerque, Nuevo Mexico, Etats Unis d'Amerique, Orbis Terrarum >>> >>> ----------------------------------------------------------------------------------------------------- >>> >>> Executive resumes, LinkedIn profiles, bios, letters, and other writing >>> services. >>> >>> >>> ----------------------------------------------------------------------------------------------------- >>> >>> *When thou didst not, savage,* >>> >>> *Know thine own meaning, but wouldst gabble like* >>> >>> *A thing most brutish, I endowed thy purposes* >>> >>> *With words that made them known.* >>> >> -- >> > 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. >> > To view this discussion on the web visit >> https://groups.google.com/d/msgid/rbw-owners-bunch/a991d3aa-5236-4990-a1a1-65528196c0b9n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/rbw-owners-bunch/a991d3aa-5236-4990-a1a1-65528196c0b9n%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > > > -- > > ----------------------------------------------------------------------------- > Patrick Moore > Alburquerque, Nuevo Mexico, Etats Unis d'Amerique, Orbis Terrarum > > ----------------------------------------------------------------------------------------------------- > > Executive resumes, LinkedIn profiles, bios, letters, and other writing > services. > > > ----------------------------------------------------------------------------------------------------- > > *When thou didst not, savage,* > > *Know thine own meaning, but wouldst gabble like* > > *A thing most brutish, I endowed thy purposes* > > *With words that made them known.* > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. 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