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Cycle Tours / Re: A pair of Thorns in West Québec
« Last post by Andre Jute on Today at 03:33:00 am »
What a pair of great riders!

They musta done something right in their lives to be rewarded with such wonderful roads, smooth, wide, with decent runoffs -- and nary a car in sight!
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Bikes For Sale / Re: Raven Tourers
« Last post by jameswentworth on July 26, 2024, 03:27:29 pm »
Yes, I believe they are both 487L
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Rohloff Internal Hub Gears / Re: Gears skipping in lower ratios
« Last post by mickeg on July 26, 2024, 12:28:51 pm »
When I first built up my Rohloff bike, I did not know anyone that had a Rohloff and no local dealers sold Rohloff bikes.  Thus I was on my own for learning this stuff.

Initially I had my cables too tight, I was used to derailleur gearing where they are supposed to be tight.  Sometimes when I shifted, the indexing did not reliably put me into a specific gear, but instead some place in between gears.  I think that is where the comment on slipping comes from if the cables are not adjusted right.

I eventually got used to needing my cables to have a lot of slack for proper shifting to occur.

This is another thread on slipping gears, in this case the owner got lucky and Rohloff covered cost for new internals.
https://thorncyclesforum.co.uk/index.php?topic=14848.0
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Cycle Tours / Re: A pair of Thorns in West Québec
« Last post by Mike Ayling on July 24, 2024, 11:16:28 pm »
What a great ride!
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Bikes For Sale / Re: Raven Tourers
« Last post by AliK on July 24, 2024, 11:04:14 pm »
I'm very interested in one of these. Are either of them a size 487L?
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Bikes For Sale / Re: Thorn Raven Rohloff - S/M frame 487L - NOW £795 ONO - can post/deliver
« Last post by AliK on July 24, 2024, 10:33:46 pm »
Is the bike still for sale?
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Rohloff Internal Hub Gears / Re: Gears skipping in lower ratios
« Last post by PH on July 24, 2024, 09:02:14 pm »
If the slippage is predictable, but it into one of those gears, disconnect the cable and see if it still does it.  You'll them know if the issue is the cable or hub.
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Rohloff Internal Hub Gears / Re: Gears skipping in lower ratios
« Last post by martinf on July 24, 2024, 07:24:29 pm »
Link to the appropriate Rohloff FAQ page:

https://www.rohloff-au.com/faq-gear-loss-slipping

They don't mention cable issues. Not so long ago I accidently bent one of the aluminium gear cable adjusters. Until I replaced this adjuster, shifting was stiff due to excessive friction in the cable at the bend, which is how I noticed the bent adjuster. But I experienced no slipping in the gears. If the shifter turns easily and the cables both move, slipping is IMO very unlikely to be due to a cable issue. 

Maybe number 6 in the FAQ page - a very worn sprocket or chain, or perhaps a new chain on a worn sprocket or vice-versa ? Never had this on a large-wheel bike with hub gears, but I have had what I call chain "skipping" with small sprockets on derailleur gears and with hub geared Bromptons that use 13T sprockets as standard.

If it's not that, I'd try number 1 in the FAQ page - a double rinse and oil change, this might flush out any metal particles blocking pawl operation.

Numbers 2 and 7 are probably not relevant, number 5 unlikely unless you have recently adjusted the axle plate.

Number 4 is easy to check visually, number 3 is also easy to check if you have a suitable torque wrench. 

If it's none of these, you will probably need to take or send the hub to a good Rohloff dealer, for example SJS, especially if you got the hub from them.
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Luggage / Re: Options to add more handlebar/dashboard estate to fix stuff
« Last post by UKTony on July 24, 2024, 02:16:36 pm »
The photo  shows the Thorn Mk2 105mm accessory T bar on my Mk2 Nomad with the Ortlieb Ultimate 6 Compact bar bag mounted using the Ortlieb mounting bracket. The Mk2 bar is 25.4mm Dia, compared with the Mk 1 at 22.2mm Dia, and the Ortlieb mounting bracket fits it nicely.

The Compact bar bag is 17cm wide and  doesn’t interfere with the shifter cables whereas my larger Ultimate 6 is 23.5cm wide and the cables do touch it but not enough to worry me. If I thought I needed to rectify this I could fit wider handle bars (the Thorn Flat Track bar fitted is cut quite short to 510mm so the distance from the centre of the handlebar to the centre of the shifter cable stops is only 105mm) so I could move the shifter, and hence the cables, a few cm to the right or I could shorten the shifter cables a little, or a combination of both.

In the alternative, Ortlieb also sell an extension block which is another option to shift the bar bag further forward to clear cables.

https://www.sjscycles.co.uk/luggage/ortlieb-ultimate-4-5-mounting-extension-block-oe165/
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Rohloff Internal Hub Gears / Re: Gears skipping in lower ratios
« Last post by mickeg on July 24, 2024, 12:52:45 pm »
Quote from: E-wan on July 24, 2024, 11:40:19 am
Any good videos on adjusting and checking cable tension?

You do not need a video.  Just make sure that they are loose enough.  For example, if I am in gear 10, my shifter knob will easily turn from about 9.5 to 10.5 from the slack in the cables.

Adjusters are where the cables go into the EX box in back near the hub.

But if your slipping problem is specific to a few gears, this is unlikely to be the problem.

Not from any form of AI.
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