Bill's analysis makes me think using a 2x with 10% difference would get back to the old half step gearing. It'll be the newest development in gearing!
dougP On Monday, August 30, 2021 at 4:10:41 PM UTC-7 lconley wrote: > Remember that the newish Shimano mountain standard 11 speed cassette width > is essentially the same as a 9 speed cassette width. The three inner cogs > are joined and overhang the hub flange. This was done to allow less wheel > dish for a stronger wheel on a mountain bike. It is possible because the > inner cogs are so large now that they CAN overhang the flange and spokes. > Might be able to get a lot of cogs on narrow cassette running the inner > three from a mountain standard cassette. > My Bombadil (3x7) and Kevin's Cargo Bike (1x7) both run 7 speed FREEWHEELS > on 135mm hubs - very little dish. One is a 40H Phil Wood hub and the other > is an NOS Sansin Tandem 48H hub. I think that I can put a freewheel on both > side of the tandem hub because the drum brake threading is the same as > freewheel threading. Haven't checked what is possible here - 6 on one side > and 7 on the other? Could I call it a 1x13 freewheel? > > Laing > who spends way too much time swapping parts between bikes. > > On Monday, August 30, 2021 at 2:57:05 PM UTC-7 Bill Lindsay wrote: > >> It will indeed be interesting to see. Several thoughts: >> >> 13-42 is 323% gearing, which is approximately a 21% jump if you do equal >> percentage jumps at all six jumps. Assuming equal percentage jumps my >> guess at the cogs would be: >> >> 13-16-19-23-28-34-42 >> >> If that's the cogs, then the biggest percentage jumps would be 23% at the >> 13-->16 and 23% at the 34-->42. The smallest jump would be the 19% from >> the 16-->19. >> >> It would be sweet if there was a rear hub with a short freehub body that >> this cogset could fit on, for very low dish rear wheel or to enable a 126mm >> OLD. I've ordered the 120mm OLD model from Cycles Grand Bois in Japan, and >> they offer a 126mm variant, but they intend that very-short freehub body >> for 5-speed or 6-speed spacing. People sometimes run 7 cogs from a 10 >> speed cassette on that hub, and I've personally run 8 from 11 on that hub. >> If the Rivendell 7sp cassette is disassemble-able, then maybe one could run >> narrow inter-cog spacers and get it to work on that hub. >> >> Bill Lindsay >> El Cerrito, CA >> On Monday, August 30, 2021 at 12:35:23 PM UTC-7 MP wrote: >> >>> It’s intriguing to me, I have an '88 Panasonic PT-3500 I’m building up >>> as a poor-man’s AHH and there’s nothing with gearing like this that’ll fit >>> into a 126mm rear-spaced frame (without doing some surgery on MTB 9 speed >>> cassettes). >>> >>> Matt >>> >>> On Aug 29, 2021, at 9:45 PM, Ray Varella <rayvar...@gmail.com> wrote: >>> >>> I think there are a number of useful possibilities as a 2x and it has me >>> looking at some chainrings I already have but would not otherwise use. >>> >>> >>> Ray >>> >>> On Sunday, August 29, 2021 at 6:11:14 PM UTC-7 dougP wrote: >>> >>>> When you think about a 2x, something like a 34-46 double with that >>>> 13-42 cassette has a pretty decent range & the front should shift just >>>> fine. Hmmmm..... >>>> >>>> dougP >>>> >>>> On Sunday, August 29, 2021 at 5:36:32 PM UTC-7 Ray Varella wrote: >>>> >>>>> Thank you Garth, >>>>> So if my rear derailer wraps 40 teeth, I could run this cassette and a >>>>> 10 (maybe12) tooth difference in my front chainrings. >>>>> >>>>> I’ll definitely stay tuned for its appearance. >>>>> >>>>> Ray >>>>> >>>>> On Sunday, August 29, 2021 at 1:54:50 AM UTC-7 Garth wrote: >>>>> >>>>>> Ray, What isn't included in the story is the use of a rear derailleur >>>>>> hanger extender. It's been mentioned in bits and pieces within their >>>>>> various media. There's many brands but what they all do is essentially >>>>>> lower the rear derailleur hanger which allows the RD to clear much >>>>>> larger >>>>>> cogs than otherwise, and without maxing out the B screw.. Note though >>>>>> that >>>>>> while it allows for cog clearance, it doesn't change the total teeth >>>>>> capacity of the given RD. Most of the mfr's of the extenders say it's >>>>>> for >>>>>> 10sp. 1x setups, but it will lwork for 2x 9sp or less as long as you >>>>>> work >>>>>> with the given capacity of the RD. Riv appears to offer the Sunrace >>>>>> version, but it uses an aluminum bolt. I'd prefer the stainless steel >>>>>> bolt >>>>>> the Wolf Roadlink and Wheels Mfr. offer. Here's just one type .... >>>>>> https://wheelsmfg.com/extended-hanger.html >>>>>> On Saturday, August 28, 2021 at 11:56:38 PM UTC-4 Ray Varella wrote: >>>>>> >>>>>>> I don’t have anything that will work with a 42 tooth rear but a 2x >>>>>>> configuration definitely has my attention. >>>>>>> >>>>>>> Ray >>>>>>> >>>>>>> On Saturday, August 28, 2021 at 5:34:33 PM UTC-7 Joe Bernard wrote: >>>>>>> >>>>>>>> The Blahg is back up. Casette uses 7-speed spacing (Grant's words) >>>>>>>> which should (my words) nominally index with a Shimano 8 shifter and >>>>>>>> normal >>>>>>>> matching derailer. But I don't know if the teeth will be indexy >>>>>>>> twisty, I >>>>>>>> don't presume Riv is pushing hard to make this thing work with >>>>>>>> anything >>>>>>>> other than friction shifters. >>>>>>>> >>>>>>>> Joe "wildly guessing" Bernard >>>>>>>> >>>>>>>> On Saturday, August 28, 2021 at 3:17:20 PM UTC-7 Joe Bernard wrote: >>>>>>>> >>>>>>>>> It's intended to work with the new RapidRise (low-normal) derailer >>>>>>>>> Grant is working on. But if we have something in a drawer that'll >>>>>>>>> work with >>>>>>>>> the 42t cog I say give it a whirl! >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> On Saturday, August 28, 2021 at 2:54:02 PM UTC-7 Ray Varella wrote: >>>>>>>>> >>>>>>>>>> Thanks Joe, >>>>>>>>>> ….so which derailer will we use with these? I say “we” because >>>>>>>>>> you may be just as likely to run one as I will. >>>>>>>>>> >>>>>>>>>> Cheers >>>>>>>>>> Ray >>>>>>>>>> >>>>>>>>>> On Saturday, August 28, 2021 at 11:41:16 AM UTC-7 Joe Bernard >>>>>>>>>> wrote: >>>>>>>>>> >>>>>>>>>>> 13-42 which will mount on a 8/9/10 hub with a spacer Riv will >>>>>>>>>>> provide (you would use it with the included spacer most 11-speed >>>>>>>>>>> hubs >>>>>>>>>>> offer, too). Intended for friction shifting and will use Riv's own >>>>>>>>>>> 7-speed >>>>>>>>>>> chain but an 8 (and probably 9) will work, too. No idexing >>>>>>>>>>> compatibility >>>>>>>>>>> was mentioned but I would imagine/hope this would work with Shimano >>>>>>>>>>> 8-speed >>>>>>>>>>> shifters with one click locked out. >>>>>>>>>>> >>>>>>>>>>> The post will probably be back, it was short and sometimes Grant >>>>>>>>>>> pulls them back for edits. >>>>>>>>>>> >>>>>>>>>>> Joe Bernard >>>>>>>>>>> On Saturday, August 28, 2021 at 9:13:48 AM UTC-7 Ray Varella >>>>>>>>>>> wrote: >>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> In Will’s email yesterday there was a link to a new blugh but >>>>>>>>>>>> there is nothing there. >>>>>>>>>>>> I had a question about the 7 speed cassette that was alluded >>>>>>>>>>>> to, did anyone read about it? >>>>>>>>>>>> It looks like a great option, >>>>>>>>>>>> Can anyone offer a brief synopsis. >>>>>>>>>>>> >>>>>>>>>>>> Thank you >>>>>>>>>>>> Ray >>>>>>>>>>>> >>>>>>>>>>> >>> -- >>> 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/dcd45114-c6b6-4554-b269-39699aa1b567n%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/rbw-owners-bunch/dcd45114-c6b6-4554-b269-39699aa1b567n%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >>> >>> -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. 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