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 < lionsrugbyalu...@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-bunch+unsubscr...@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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