That's a lovely setup, Bill! It's reassuring to know the 3x1 setup works well.
After 6 months with my Platypus, I find myself lusting after a single-speed Riv for my daily commutes. I recently reached out to ensure I didn't miss the pre-sale for the Roaduno. I was informed the Roaduno pre-sale will be taking place two weeks from now, Jun 27th. Now I find myself wondering what colors will be offered :) Tio "99.9% getting one even if it's the same color as my Platypus" Ryan On Saturday, June 8, 2024 at 8:35:28 PM UTC-4 Bill Lindsay wrote: > I wanted to get my 3x1 up Diablo before all you 3x1 RoadUno riders have > the chance! > > Today I finished my 6th summit of Mount Diablo, on my 6th different bike. > I've summited Mount Diablo every month of 2024 (so far). > This time it was on the RoadTrio, my version of a RoadUno 3x1 build. In > the last few shots I've been rounding out the 3x8 sport touring > configuration. Part of the rear end set up was to enable a quick change, > and I did the quick change against the clock last night. In under 5 > minutes I had it switched from 3x8 to 3x1. I had also switched out the > crankset to a very slightly different gear range: a 94mm BCD Ritchey > crankset let me run 22/34/46 rings, instead of the 24/36/46 of the 110 BCD > Ritchey crankset that had been there. Whether that difference was critical > for my ride today is debatable. What is certain is that the 22x18, 31-inch > gear was welcome. > > Even though I only had to shift like 5 times all day, this front end > shifting is totally liquid, and while riding each gear rode silently like a > single speed. The White Industries ENO freewheel may be the best sounding > freewheel ever (among freewheels that make a sound). > > I picked this day for my June summit because the temperatures swung low > after our first hot-snap. It was low 50s to mid 60s all morning, and maybe > peeked into the 70s in the lowlands of Walnut Creek. I took BART from home > to the shadow of Mount Diablo, cutting the mileage down to ~52 miles and > 4950 ft of climbing. The Romulus climbed and descended like an absolute > champ. I am extremely proud of my rack/bag/fender integration, and the > handling even with a front load was great. I was shocked at how well my > knobby 700x26 Gravel Kings rode. By looking at them it would be natural to > assume they'd stink, but they were great. After my summit I swung by Riv > HQ and got the Will stamp of approval. > > Pics prove it: > https://flickr.com/photos/45758191@N04/53778303336/in/dateposted/ > > https://flickr.com/photos/45758191@N04/53778627464/in/album-72177720313832831/ > > https://flickr.com/photos/45758191@N04/53778626719/in/album-72177720313832831/ > https://flickr.com/photos/45758191@N04/53778303561/in/dateposted/ > > Bill Lindsay > El Cerrito, CA > > On Sunday, April 28, 2024 at 7:36:15 AM UTC-7 Bill Lindsay wrote: > >> "I would expect much crisper shifting with that setup than a wide-range >> triple up front. " >> >> If you build one of each and offer the comparative ride report, I'll be >> pleased to read it. I still have the gear chart in front of me the last >> time Patrick Moore offered the theory that three gears in the back is >> objectively superior to three gears in the front. That gear chart has a >> 36T ring with a 14/18/27. I built a three cog freewheel and ran it on a >> 120mm O.L.D. hub, but not with a derailleur. Usually (and I expect now) >> Patrick Moore will say how he is philosophically opposed to a tensioner of >> any kind and prefers long horizontal drop outs and a QR skewer for manual >> gear choosing. >> >> The thing that keeps coming to mind is the classic 5-speed freewheel: >> 14-17-20-24-28. That has all the span we're talking about. A nice 120mm >> O.L.D. frame with a 1x5 drivetrain, friction shifted with a modest rear >> derailleur would do all these things. Don't be surprised a drivetrain of >> that kind pops out of my workshop in the next 3-6 months as well. I >> encourage Ted and Patrick to build their ideas also. >> >> Bill Lindsay >> El Cerrito, CA >> >> On Sunday, April 28, 2024 at 7:10:32 AM UTC-7 Ted Durant wrote: >> >>> On Saturday, April 27, 2024 at 12:41:12 PM UTC-5 Patrick Moore wrote: >>> >>> But I keep coming back to theoretical efficiencies: IIRC, the gearing >>> effect of tooth jumps in back are more or less double what they are in >>> front. So the question is, how to get just 2 or 3 big jumps in back without >>> a IGH. >>> >>> >>> Just build a 3-speed cassette and fill the rest of the space with >>> spacers. >>> >>> Bill's 46-36-24 is jumps of 25% (46-36) and 41% (36-24). An equivalent >>> 25% jump in back would be 15-19 (24%), 16-21 (27%), 17-22 (26%), 18-23 >>> (25%). An equivalent 41% jump in back would be 16-24 (41%), 17-25 (39%), >>> 17-26 (42%), 18-27 (41%), 19-28 (39%), 19-29 (42%), 20-30 (41%), 21-31 >>> (39%), 21-32 (42%), ... >>> >>> A very close equivalent to the 46-36-24 in front would be 15-19-28 in >>> back. Pair that with a 44T chainring and you'd have 42-63-79 gear inches on >>> 700x32C tires. At 22t of required chain wrap, take your pick of any rear >>> derailer. I would expect much crisper shifting with that setup than a >>> wide-range triple up front. Combine it with a compatible index shifter and >>> you'll have a nice 3-speed externally geared hub. >>> >>> If you were so inclined. >>> >>> Ted Durant >>> Milwaukee WI USA >>> >> -- 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/c9f8da3e-5fe1-4da5-ab3e-a8501ebba761n%40googlegroups.com.
