To short derailleur hanger for Nexus 3 IGH with chain tensioner

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Bobbyhax   100 µW

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To short derailleur hanger for Nexus 3 IGH with chain tensioner

Post by Bobbyhax » Mar 08 2018 9:01am

I am rebuilding my e-bike from rear derailleur to IGH, and have come across a problem.
My derailleur hanger is to short. I cannot get on the Nexus gearbox when the chain tensioner is mounted

Found this product Wolf Tooth RoadLink, that extend the hanger arm.

Do you think this will work, or is it something I haven't thought about? Maby you have other good solution for tension the chain?

This is the problem
Problem rear hanger - gearbox.jpg
The problem
Problem rear hanger - gearbox.jpg (68.53 KiB) Viewed 565 times
The RoadLink https://www.wolftoothcomponents.com/products/roadlink
Image

IGH: Shimano Nexus 3 SG-3d55
Chain Tensioner: Shimano CT-S500
Shifter. Shimano Revoshifter
Last edited by Bobbyhax on Mar 08 2018 12:22pm, edited 1 time in total.

WoodlandHills   10 kW

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Re: To short derailleur hanger for Nexus 3 IGH with chain tensioner

Post by WoodlandHills » Mar 08 2018 11:24am

I used their goatlink on mine. It needed to be put on backwards to get it to extend forwards enough to work, but it's been there for months now.

Bobbyhax   100 µW

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Re: To short derailleur hanger for Nexus 3 IGH with chain tensioner

Post by Bobbyhax » Mar 08 2018 12:30pm

That's was not a bad idea. I also think now that the goatlink is a better option for me. Because the chain tensioner is not in line with the sprocket. If I use the goatlink I mayby not need to use spacers on the chain tensioner because the goat link moves it outwards.

Can you post a picture of your chain tensioner with the goatlink WoodlandHills? :)

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zro-1   1 kW

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Re: To short derailleur hanger for Nexus 3 IGH with chain tensioner

Post by zro-1 » Mar 08 2018 8:54pm

I did the same conversion and I just removed the black plastic bottom cover to get the clearance I needed to attach the shifter to the axle end. I used this chain tensioner: http://a.co/5XBT7lO to replace the derailleur.
~01~

Bobbyhax   100 µW

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Re: To short derailleur hanger for Nexus 3 IGH with chain tensioner

Post by Bobbyhax » Mar 11 2018 11:50am

Couldn't wait for shipping of extender, so I just made one myself :)

Made out of 316 stainless steel. The treads on the Shimano derailleur is very fine M10x1, but after having been looking around at work, I actually found a threading die and a tap that was M10x1 :D
The plate is sandblasted

Weary happy with the result.

If the plate is slipping, I will then TIG weld on a nut and have a screw in to hold against the dropout
Attachments
Hanger extender mounted.JPG
Hanger extender mounted.JPG (106.71 KiB) Viewed 483 times
Hanger extender.JPG
Hanger extender.JPG (71.06 KiB) Viewed 483 times

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