On 11/13/2017 8:01 PM, JQ wrote:
On 11/13/2017 4:04 AM, JQ wrote:
On 11/10/2017 8:50 AM, wrote:
Dear All,

Thank you for your comments and advice. I investigated a little more
and I have isolated the skipping to the 8th gear. It only happens
after pedaling for a while so it is hard to replicate on a stand.
Now, every time it happens, I change the adjustment a little and
experiment with the frequency of the skips.

Also, as you suggested, I need to change the oil. The Shimano or
Rohloff oils are ridiculously expensive, so I have found this
alternative at a reasonable price:

Liqui Moly 1401 GL4 SAE 80 W Transmission Oil

For about $10 per quart it will allow me to rinse the hub more than
once and more change the oil. What do you think?

Many thanks again

Dimitris

https://www.amazon.de/gp/product/B004FPQYW4/



On Tuesday, September 26, 2017 at 3:22:34 PM UTC+2, dstamat wrote:
Dear All,

The Alfine 11 SG-S700 hub of my commuting bicycle has started to
skip when I pedal standing up. Mostly around the middle of the
range (5, 6 and 7). I hear a very loud noise and I have to stop
pedaling. It does not happen when pedaling seated. When in 6 gear
the two small yellow lines are aligned so I guess it is not because
of bad adjustment.


I have had this bike for ~5 years but it has only been ridden for
~1000 mi. The oil of the hub has not been changed yet.

Any ideas?

Thanks in advance

Dimitris

I would think the gear that is skipping is the one you ride in
mostly, right? If it is the case the chain has stretched and the gear
teeth has also stretched, so when it is under heavy load the instead
of the chain sitting in the chain groove it is slipping up and out.Â*
causing the hops or skips. Start saving up your money to replace both
the chain and cassette. You will be able to get many more miles but
you will need to start avoiding the gear that is slipping. Keep the
chain clean and lubed and the cassette clean to get the most out of
it. A new or newish chain may give you better performance but I would
not put a new chain on there until you switch out everything. Get a
decent chain and cassette and definitely don't go with the lightest
one around as they will not last as long. Good luck and safe riding...

i just realized that the bike in question is a hub system and not th
standard drive system. That's what happens when you pull and all
nighter with only a few hours sleep the few nights before. I have not
worked on a hub system so my advice may not be correct, sorry!

While giving it some more thought and think someone else mentioned it
too. I would still check the chain for stretch and the rear sprocket for
stretched teeth deformation. The same theory would apply. It is the gear
you have enough power to cause the chain to hop, the next bigger gear is
too much or you haven't given it enough power to hop and the easier gear
you may not be able to make it skip if had not pounced on it hard enough
before it would start to spin out. The internal hub is like a automobile
automatic transmission working off oil friction plates. If the oil is
contaminated or you are running two different oil types or there was a
manufacturing defect the hub should not skip only in one gear. If you
bought it new and it is still under warranty take it back to the shop.

--

Ride fast, ride hard, ride for health and enjoyment... Coach JQ Dancing
on the edge

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