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81
Rohloff Internal Hub Gears / Re: Electronic shifting for Rohloff hubs
« Last post by in4 on October 27, 2024, 06:59:16 AM »
As I still use a railwayman's pocket watch with a bin-lid diameter the subtleties and refinement of a Constantin wristwatch would be lost on me  :)
That said I can understand the growing appeal of electronic shifting for Rohloff hubs; its in-sync' with the rise in ebike users. However, on a tour and/or riding in the proverbial 'middle of nowhere' I think i'd stick with a manual twist grip. Its less likely to go wrong and perhaps easier to figure out a workaround if necessary. I'd probably say the same in the disc v rim brake debate. Now, where did a put my sextant?!
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Rohloff Internal Hub Gears / Re: Electronic shifting for Rohloff hubs
« Last post by Andre Jute on October 27, 2024, 01:20:11 AM »
Thanks for sharing, John. I think it's a desirable accessory, in the sense that a Vacheron Constantin wristwatch is a desirable accessory until I remember that it has been well over fifty years since I last went to an office, but will quite understand if others feel that a run-in standard Rohloff control system is smooth and glitchless enough to keep until a genuine torque-based full auto controller becomes available.
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Rohloff Internal Hub Gears / Re: Electronic shifting for Rohloff hubs
« Last post by WorldTourer on October 26, 2024, 11:51:19 PM »
I think we here often forget that touring/bikepacking is just one market for Rohloff hubs. The other market is European mid- and high-end commuting and cargo bikes, and electronic shifting is swiftly become a widely implemented thing there.
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Rohloff Internal Hub Gears / Re: Electronic shifting for Rohloff hubs
« Last post by hendrich on October 26, 2024, 11:42:51 PM »
The simplicity of the twist shifter is wonderful for touring in the middle of nowhere. No need to complicate with batteries/electronics, which IMO, are a superfluous gadget. I have never understood the issues raised in this article. Yes, sometimes sweat causes slippage, but then I wrap a wide rubber band on the shifter…problem solved. I like be able to shift many gears in a second.
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Rohloff Internal Hub Gears / Re: Rohloff: "Below the 1.9 Threshold"
« Last post by Andyb1 on October 26, 2024, 02:27:00 PM »
Sorry I can not answer your question but as Martin has said other factors come into play such as body weight and crank length which effect how much torque is put into the hub….and Rohloff’s figures are likely to be conservative (they don’t want failures).
Is there a max rider weight / crank length on which they base their lowest final drive ratio?
If so, how does your weight / crank length compare?  If your figures are (say) 20% lower then I would have thought you could safely use a 20% lower final drive ratio.

The hub won’t know if the torque applied to it is from a heavy rider on long cranks at the ‘correct’ final drive ratio or a lighter rider on shorter cranks with a lower final drive ratio.

Edited to add:
Found something on’t net saying that the 1.90 lowest FD ratio is for a rider up to 100kg
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Rohloff Internal Hub Gears / Electronic shifting for Rohloff hubs
« Last post by JohnR on October 26, 2024, 08:21:31 AM »
I've just stumbled on this article about the Sternshift https://www.cyclingabout.com/electronic-shifting-for-rohloff-hubs-now-possible-sternshift/. It's not cheap and needs the elongated non-driveside rear dropout as used by Thorn.



87
Non-Thorn Related / Re: +++Rides of 2024+++Add yours here+++
« Last post by Andre Jute on October 23, 2024, 10:03:37 PM »
That blue sky is indeed spectacular, but the trees behind Pink Lake seem some way from a consensus on whether autumn has actually arrived.

From habit we put the central heating on at the beginning of October, and I've thought several times about switching it off again because the daytime temps here have been 17 degrees C and over, totally out of order -- too high -- for this time of the year.

Looks like the autumn has arrived more firmly in your yard than at the lake.
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Rohloff Internal Hub Gears / Re: Rohloff: "Below the 1.9 Threshold"
« Last post by martinf on October 23, 2024, 08:08:44 PM »
I'm just under the 1.9 threshold at 1.81 with 38/21 on my "touring" Raven Tour, the bike I generally use for cycle-camping.

But :

- I use 150 or 155 mm cranks, which reduce the force applied as compared to 170/175 mm standard sized cranks. Short cranks also help me to "spin" at about 90 rpm rather than "mash" at about 60 rpm. For a given power output, easier on my knees and almost certainly less stress on the drivetrain.
- At age 68, I reckon my power output has dropped fairly significantly over the last five years, by at least 10%, maybe more. So if a 1.9 threshold was OK 5 years ago I believe 10% less (=1.71) should be OK now.

So although I have invalidated the guarantee I am not at all worried about breaking my 13 year old Rohloff hub.

I think it might be an issue if you are a very strong/tall cyclist and tend to "mash" rather than "spin" the cranks.

___________

I don't believe the load carried has much direct influence, I just tend to use lower gears and go slower when cycling uphill with a big load.

But with a very heavy load you sometimes have to push harder on the pedals, which can have an effect. A few years ago I did manage to provoke a gear skip in a Nexus 8 hub while straining to pull my overloaded trailer up the incline to my house. But that was an extreme case with 130 kg of cargo in a 15 kg trailer.

And a Nexus hub is rated for a much lower torque input than a Rohloff, Nexus is quoted at 50 Nm and Rohloff 130 Nm. 




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Non-Thorn Related / Re: +++Rides of 2024+++Add yours here+++
« Last post by John Saxby on October 23, 2024, 07:54:03 PM »
A full two months since the last post...

But we're past Thanksgiving now, and yesterday, the temps were in the mid-'20s, with a forecast pointing to a dramatic drop before the end of the week.  So, out of the shed and across the river and into the trees, in search of autumn foliage.  I rather knew what to expect -- a month back, I had made a similar ride, and the foliage had barely changed, so weird-and-wonderfully warm were the temps.  (With apologies The Usual Busyness pre-empted any post and photos.)

I'd hoped to do a longer ride than the usual up-and-down to Pink Lake, but The Usual Busyness allowed just a nice'n'sweaty two hours.  Since we had some serious deluges in the first half of August, we've had very little rain at all, and the woods in the Gatineau were sooooo dry.  No gurgling streams as I climbed the bikepath to the park, just stagnant pools amid rocks.

Dryness combined with rocky hills and shallow soil, and there was no spectacular foliage -- just muted browns, gold-and-bronze, and copper.

We'll have to rework Bliss Carman's ode to autumn in Eastern Canada:

     Along the line of smoky hills, the crimson forest stands.
     Along the line of dusty hills, the withered forest stands,
     And all day long the blue jay calls, throughout the autumn lands.
     And all day long the blue jay squawks,
     "Alright you humans, now you've bloody gone and done it!"

But I managed a couple of photos from the park that show the state of play -- see #s 1 and 2 below.  A splendid cobalt sky, but a bleached-out view due east from Pink Lake lookout. #3 shows Freddie leaning against his shed in our back yard.  The bright golden foliage shows what some rich clay/loam soil (the ancient river- and lake-bed, post-Ice-Age) and better watering will do -- all the rain off the northern half of our roof is channelled to the maple and locust in the photo.

All for this season, I should think.  The cold and frosts of November will soon be upon us, and with those, the dreaded black ice on the roads in the Gatineau.  And then, if the drought breaks, to be followed by snow enough for cross-country skiing.🤞
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Was it you? / Re: Anyone’s Nomad?
« Last post by in4 on October 23, 2024, 07:28:28 PM »
Lived a life that has!

Speaking of the same: Here's a 590 MK2 S&S Nomad. Worth a look just for the photos.

https://www.ebay.co.uk/itm/156466618268?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=uplmhav1qbw&sssrc=2047675&ssuid=&widget_ver=artemis&media=COPY
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