This is an extremely rare sound created by friction between the o-rings and the bearing seal at the back of the Neo axle.
This can occur when the bearing seal at the back of the Neo protrudes past the inner race. The bearing seal touches the o-ring, creating the rubber squeal. Because the bearing seal is harder than the o-ring, this friction will quickly deteriorate the outer o-ring, leaving a shredded bits of rubber inside the Neo and wedged in the bearing seal.
Steps To Resolve
This is an extremely rare sound, and so it shouldn’t be too surprising that you’re going to need some expert assistance from Tacx support.
- Create a video of the sound that you’re hearing.
- Send an email to email@example.com and attach your video.
- Tacx should send you a disc extractor and an o-ring kit, because you will need to replace the damaged o-ring.
- Remove the Neo disc, and very carefully vacuum any bits of material from within the Neo, ensuring that none of the particles fall down the vents.
- Cover the vents with a piece of residue-free gaffer’s tape.
- Remove any remaining bits of o-ring from the Neo spindle.
- Install the new o-rings from the kit you received from Tacx.
- Remove the tape that was covering the lower vents
- Reinstall the Neo disc
Here is a video from Tacx describing the process of removing and reinstalling the Neo disc. Please follow any additional instructions that you receive from Tacx support.