Nice!
On Monday, February 27, 2023 at 8:43:25 AM UTC-5 lconley wrote: > I am down to 11 Rivendells and 10 of them have 135mm spacing (the Frank > Jones, SR. is 120) and I weigh 275 lbs - thus the ultra durable 135mm > wheels. I have a 40 spoke 132mm Sturmey Archer 3 speed on the Rosco Baby. > Jobst Brandt worried about breaking frames, I worry about breaking wheels; > not that I break spokes, but like Jobst, I am also a mechanical engineer. > I have too many bikes and way more hubs than bikes, I am afraid to count > the hubs and wheels that I have. > The 120mm wide Frank Jones SR. has my 2nd coolest hub set, a old, fairly > rare Campagnolo Hi-Lo hub set with track axle conversion - only 36 holes. > > [image: IMG_1705.jpg] > > Laing > > On Sunday, February 26, 2023 at 5:30:09 PM UTC-5 Patrick Moore wrote: > >> Laing: Why the concern with ultra-durable wheels with 135m OL spacing? >> Just curious. And what chainings? >> >> I recall that one of the smoothest wheelsets I ever rode was a 48-hole -- >> must have been built at one time for a tandem -- pair with old Campy Record >> freewheel hubset and fixed cog on a 1960s Paramount track bike that my >> brother lent me to ride with him in LA over 20 years ago; a very smooth and >> inevitable feeling of momentum. >> >> I commuted on a 44/47 5+2 halfstep (no granny; big cog was granny; see >> below), later switching to 45/48, with crusiing 17 t cog in the middle of >> the cassette shifted with wonderful Kelly Takeoffs and old Record shifters. >> Most of my riding was just back-and-forth on the left shifter, 65"/70" or >> 66"/71" gears. I half stepped the middle 5 cogs and used the outer with big >> for downhills and the inner with the small for steep uphills; ~100" to >> ~35", a very usable set of gears, of which I generally used only the middle >> band for our rolling terrain (I was a young late-40-something). In fact, >> most of my riding was in the 17, just flicking the left shift lever back >> and forth -- half-step indexing. All this was on my 1995 26" wheel (25" >> actual commuting wheel diameter with 32 mm Tioga City Slickers or somesuch) >> Riv Road custom that I'd demoted or promoted to commuting use. >> >> 48 45 47 44 >> 12 100 12 98 >> 13 92 87 13 90 85 >> 15 80 75 15 78 73 >> 17 71 66 17 69 65 >> 20 60 56 20 59 55 >> 24 50 47 24 49 46 >> 32 35 32 34 >> >> On Sun, Feb 26, 2023 at 10:49 AM lconley <lco...@brph.com> wrote: >> >>> Among other changes that I am making to my Bombadil, I am converting to >>> my favorite triple gearing: a half-step plus granny. The idea behind a >>> half-step plus granny is that the two large chainrings on a triple are >>> close in size so that you can split the difference (half-step) between any >>> two sprockets on the rear. The inner chainring on the front is a small >>> bailout or "granny" gear. This strategy works best when you have a limited >>> number of rear cogs - fairly unnecessary when you have 11 or 12 rear cogs. >>> The rear cogs should maintain as constant of a % difference (step) as >>> possible - this means that the number of teeth difference between cogs will >>> increase as the cogs get larger. >>> I had a Sugino triple on the front - I kept the stainless steel 24t >>> granny and used TA Zephyr 39 and 42 middle and outer chainrings (from Peter >>> White). The 7 speed freewheel is an NOS Suntour New Winner >>> 12-14-16-18-21-26-34 that I bought a few years back for this purpose (they >>> seem to have gotten very pricey as of late). This gives me 18 distinct, >>> non-overlapping gears from 19 to 95. You do have to double shift (front and >>> rear) sometimes to get the gear you want. When I was younger, I taped my >>> gear ratios on top of the stem. >>> I use 7 speed freewheels for the rear hub for the same reason that >>> Rivendell is looking into producing 7 speed cassette hubs - less wheel dish >>> means a stronger wheel. So far I have acquired 3 Phil Wood rear hubs that >>> were either 7 speed 135mm, or that I converted to 7 speed 135mm - a 36 >>> hole, 40 hole and my latest - an NOS 48 hole. The 48 hole is going on the >>> Bombadil to replace the 40 on it now. >>> One kind of odd thing about this is that the chainrings have ramps and >>> pins, but the freewheel has none. I expect it to shift just fine. Rear >>> derailleur is all silver Sun XCD and the front will be either the all >>> silver IRD Alpina-d already on the bike or an all silver IRD Sub-C - >>> whichever plays best with the chainring combination. The chain is a >>> stainless steel Wippermann 8 speed that I have ultrasonically cleaned and >>> Molten Speed Waxed. >>> Bar end shifters will be either Dura-Ace 8 speed or Rivendell Silver 2. >>> If the indexing works with the Dura-Ace shifters - they will be used, >>> otherwise friction will be the Silver 2. >>> >>> [image: Half step s.jpg] >>> >>> Laing >>> Delray Beach FL >>> >>> -- >>> >> 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/adca3cec-e432-4033-b545-aca3ad722763n%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/rbw-owners-bunch/adca3cec-e432-4033-b545-aca3ad722763n%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >> >> >> -- >> >> ----------------------------------------------------------------------- >> Patrick Moore >> Alburquerque, Nuevo Mexico, Etats Unis d'Amerique, Orbis Terrarum >> >> -- 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/108baa9d-76b1-4ee5-9e8f-defc31644dcdn%40googlegroups.com.
