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Alfine 11 Speed IGH Jumping Gears?

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Alfine 11 Speed IGH Jumping Gears?

Old 03-12-12, 03:44 PM
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TornadoCAN99
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Alfine 11 Speed IGH Jumping Gears?

Hi,
my new hybrid Spot ACME with 11 Speed Alfine Internal Gear Hub & Gates carbon beltdrive seems to occasionally jump/change gears while riding. I have not noticed this happens at any particular gear of direction of change (up/down). My hub mark points are correctly aligned.

My local bike shop made a belt drive tension check/slight adjustment and I will test over a few days to see if that resolves. They also mentioned it might be related to extra drag on the shifter cable and noted that Shimano now sells a water-seal kit for the cable. Since I ridein wet rain a lot here, this might be the trick.

Any other thoughts?

Thanks.
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Old 03-12-12, 09:23 PM
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Originally Posted by TornadoCAN99 View Post
Hi,
my new hybrid Spot ACME with 11 Speed Alfine Internal Gear Hub & Gates carbon beltdrive seems to occasionally jump/change gears while riding. I have not noticed this happens at any particular gear of direction of change (up/down). My hub mark points are correctly aligned.
Does it only happen after you shift? Or does it sometimes skip even when you haven't shifted and are in gear?

My local bike shop made a belt drive tension check/slight adjustment and I will test over a few days to see if that resolves.
I don't know if belt drives are sensitive to misalignment and could be skipping. I have no experience with those. If it was the belt, I would think, the problem wouldn't only happen when you shift.

They also mentioned it might be related to extra drag on the shifter cable and noted that Shimano now sells a water-seal kit for the cable.
Ensuring your cable is running smooth is the first thing to check. And also check that the external parts of the shifting mechanism on the hub are moving freely.

I ride in wet rain a lot here
I much prefer dry rain. I agree wet rain sucks.
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Old 03-13-12, 12:34 AM
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cable stretch,is always a 1st suspect, check the indicator marks for allignment.

Still has the index lever in front and the activity happening in the back.
1 cable and a return spring ..
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Old 03-17-12, 12:15 PM
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Originally Posted by fietsbob View Post
cable stretch,is always a 1st suspect, check the indicator marks for allignment.

Still has the index lever in front and the activity happening in the back.
1 cable and a return spring ..
Indicator marks would be the first thing to check. That has been the only time I have had any issues with the Alfine 8. Easy adjustment.
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Old 03-17-12, 05:57 PM
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I am on my 3rd Alfine 11 hub that skips from time to time. Going to send it in for yet another warranty. One of them didn't shift right out of the box.

It has skipped in 6th and I coasted to the stop and confirmed the index marks were in perfect alignment. A few as of them as there are around here, mine is still not he only warranty my LBS has processed. The bike with the Alfine 11 does not get ridden in mud, rain or off-road. Shimano likes to deny that they have a problem with the Alfine 11 but they do. At the same time, they have never denied the two I sent in were defective. I am holding off on the 3rd warranty claim hoping they make some engineering changes for the better.

My Alfine 8 has never skipped and shifts perfectly, but makes noise like a sawmill.

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Old 03-17-12, 05:58 PM
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Originally Posted by fietsbob View Post
cable stretch,is always a 1st suspect, check the indicator marks for allignment.

Still has the index lever in front and the activity happening in the back.
1 cable and a return spring ..
The OP says the marks are aligned.

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Old 03-18-12, 12:54 AM
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I've also seen an Alfine 11 that had to get returned under warranty because despite the cable marks being aligned, after a few months of use there was no difference between gears 1 and 2 and gear 4 was easier than gear 3 (whereas all other gears were in the correct order). It was taken care of very quickly under warranty, but it makes me wonder how good the design of these hubs really is. BTW, this was also on a belt-drive bike.
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