Hey Patrick, Maybe you've already completed your two-speed conversion, but if not, there is some useful info in yesterday's Bikesnob blog: https://bikesnobnyc.com/2023/11/29/dingle-all-the-way/
The key message is that the Surly single-speed cogs are thicker at the base so you could use one for your second cog without needing a spacer. It should allow the lockring to fit. -Wes On Sunday, October 29, 2023 at 12:42:39 PM UTC-7 Patrick Moore wrote: > Excellent! Thank you! So there is serendipity in that the lockring threads > match standard fw threads. Very good to know. > > Now I can simply overhaul that cheap ss freehub -- Redline? -- and don't > have to spend $$$ for a DOS; *also* I can use the current 32 t ring with > an outer, screw-on 15 t cog for a 65" cruising gear and buy a splined ss 17 > or perhaps even 18 t cog for a 57" or even 54" sand bogging gear -- if, > that is, a QR disc rear wheel allows this. > > On Sun, Oct 29, 2023 at 9:49 AM Wesley <brooks...@gmail.com> wrote: > >> Hi Patrick! >> I don't remember the hub, and I searched my email for hubs I bought in >> 2009 – I was only able to find the one I built into the front wheel. >> However! This exercise show something loose in my head and I now recall how >> I made the monocog into a two-speed (before whatever I did to add a third >> cog). I replaced the locking by a fixed-gear cog. Here's a text diagram: >> >> Your current setup has: spokes - spacer - splined cog - lockring >> >> Change it to: spokes - splined cog - spacer - threaded cog >> >> I hope this helps! >> -Wes >> >> On Saturday, October 28, 2023 at 9:51:46 PM UTC-7 Patrick Moore wrote: >> >>> Do you recall the hub you used with the unicycle rim? I seem to recall >>> BMX freehubs that had room for 2 cogs. >>> >>> On Sat, Oct 28, 2023 at 9:16 PM Wesley <brooks...@gmail.com> wrote: >>> >>>> Yeah, it looks marginal to get a second cog in there with a narrower >>>> spacer. According to Sheldon Brown, 9-speed cogs want a 2.54 mm spacer >>>> between the cogs: https://sheldonbrown.com/cribsheet-spacing.html >>>> >>>> I now remember that my monocog became a three speed after I built it a >>>> pair of winter wheels (I used a pair of very wide unicycle rims for >>>> maximum >>>> float). So I probably kept the original when intact and built a new hub >>>> into the new wheel. Sorry for not remembering, the bike has been out of my >>>> life for about eight years. >>>> >>>> -W >>>> On Saturday, October 28, 2023 at 1:17:17 PM UTC-7 Patrick Moore wrote: >>>> >>>>> Wesley: Sorry, I missed this post in the thread volume. >>>>> >>>>> I'm pretty sure that my Monocog's freehub body takes only 1 cog; see >>>>> photo with single 3/32" cog and 2.5mm spacer: the splines end right after >>>>> the spacer. >>>>> >>>>> Am I looking at things right? I hesitate to remove the wheel because >>>>> getting the tire exactly centered in the chainstays, with 2-3 mm >>>>> clearance >>>>> a side and the inevitable tire runout, while also adjusting chain tension >>>>> is a pain. >>>>> >>>>> [image: image.png] >>>>> >>>>> On Tue, Oct 17, 2023 at 3:56 PM Wesley <brooks...@gmail.com> wrote: >>>>> >>>>>> 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. >>>>>> 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/fe30b462-2932-4edb-b589-9237af7776f9n%40googlegroups.com >>>>>> >>>>>> <https://groups.google.com/d/msgid/rbw-owners-bunch/fe30b462-2932-4edb-b589-9237af7776f9n%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 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----------------------------------------------------------------------------------------------------- >>> >>> *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/f5feabf1-0de8-47b1-b95e-26c30a80ce75n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/rbw-owners-bunch/f5feabf1-0de8-47b1-b95e-26c30a80ce75n%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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