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Should I keep or remove the yellow anti-rotation washer when installing a child trailer to my e-bike (EcoRide with Shimano Nexus 3 speed)? The trailer installs through the wheel axle (see attached img.)

Shimano nexus with trailer mounted through wheel axle

  • Do you have to make a choice, can you keep it and install the trailer too? Do you have a black one that’s like the yellow one but on the other side? A follow on question would be which side does the yellow/black go on (I think it’s the opposite side but don’t have the answer for how essential that is) – Swifty May 8 at 10:52
  • Check with your bike dealer whether Shimano requires the yellow washer to be used. – Carel May 8 at 12:59
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If the wellow washer is a anti-rotation washer - one that fits in a slotted dropout and prevents the internally geared hub from rotating with the axle - then yes it needs to be in place.

  • Thanks! I'll put the trailer attachment outside the yellow washer. – Ola May 9 at 6:19

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