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tl;dr- it looks like the scylence mechanism is still in place in the new shimano hubs, but they've prevented it from functioning by adding a spacer to prevent the mechanism from disengaging and not lubing the sliding assembly.
I mentioned this in a previous thread, but i thought it was interesting enough to give it's own topic.
I have a new superboost XT hub- this guy.
![HU2473.jpg]()
Shimano XT FH-M8130-B
I ordered it the week it became available from Q. It would softly buzz like you'd expect (since scylence was cancelled), but if you were moving along at a good clip, or you backpedaled, it would go silent. At the time i was not aware that this wasn't typical behavior, but it isn't.
After ~250 miles my rear end started making tons of noise, like the spokes were creaking under higher intensity efforts. I did an exhaustive effort to find the culprit, including disassembling the hub. It looked perfect. Couldn't figure it out.
A couple days ago i took the hub apart again, this time with an exploded diagram to check myself. I was missing this spacer-
![slider.JPG]()
I can't say with 100% certainty that i didn't drop it when i dismantled the hub for the first time, but i now know that my hub going silent at a certain speed was not normal behavior.
I ignored the huge warnings in the tech docs and PRINTED ON THE HUB INTERNALS that said to never lube the engagement mechanism, and dribbled some triflow in there. My hub now behaves like scylence was advertised to- quick engagement and total silence. It's awesome.
I don't know for sure (there's virtually no information about new shimano hubs available), but it looks like shimano kept the scylence drive mechanism, but is relying on the 'stickiness' of the drive plates and that spacer to prevent the hub from disengaging. Since my spacer was missing, the unlubricated drive plates could separate under the right conditions and eventually started to creak.
I have no idea why shimano decided to scrap scylence at the last moment, or do it with this seemingly kludge solution. I have 2 rides with the hub set up this way and it's glorious. I'm gonna see how it goes, warranty be damned. I'm very good at breaking hubs under high torque efforts and ride several times per week, so it should be interesting.
I mentioned this in a previous thread, but i thought it was interesting enough to give it's own topic.
I have a new superboost XT hub- this guy.
Shimano XT FH-M8130-B
I ordered it the week it became available from Q. It would softly buzz like you'd expect (since scylence was cancelled), but if you were moving along at a good clip, or you backpedaled, it would go silent. At the time i was not aware that this wasn't typical behavior, but it isn't.
After ~250 miles my rear end started making tons of noise, like the spokes were creaking under higher intensity efforts. I did an exhaustive effort to find the culprit, including disassembling the hub. It looked perfect. Couldn't figure it out.
A couple days ago i took the hub apart again, this time with an exploded diagram to check myself. I was missing this spacer-
I can't say with 100% certainty that i didn't drop it when i dismantled the hub for the first time, but i now know that my hub going silent at a certain speed was not normal behavior.
I ignored the huge warnings in the tech docs and PRINTED ON THE HUB INTERNALS that said to never lube the engagement mechanism, and dribbled some triflow in there. My hub now behaves like scylence was advertised to- quick engagement and total silence. It's awesome.
I don't know for sure (there's virtually no information about new shimano hubs available), but it looks like shimano kept the scylence drive mechanism, but is relying on the 'stickiness' of the drive plates and that spacer to prevent the hub from disengaging. Since my spacer was missing, the unlubricated drive plates could separate under the right conditions and eventually started to creak.
I have no idea why shimano decided to scrap scylence at the last moment, or do it with this seemingly kludge solution. I have 2 rides with the hub set up this way and it's glorious. I'm gonna see how it goes, warranty be damned. I'm very good at breaking hubs under high torque efforts and ride several times per week, so it should be interesting.
