Shimano Nexus 8 Speed Hub - Dissection! Evisceration! Destruction!

I disassemble a Shimano Nexus 8 speed hub to see what's inside.The hub is a Shimano Nexus SG-8R20. It also had the option roller brake installed. The hub is probably as complicated as a car transmission. I ain't never getting this thing back together again! LOL!

Shimano Nexus 8 Speed Hub Reassembly - Putting It Back Together...:

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[allencrider]

Just think: someone actually designed this thing.

[jclohesy]

Thanks for doing this. I love the Shimano Nexus gear, so incredibly robust compared to derailleur. I now have immense respect for the engineering, and will never resent paying for a gear hub. Our family have done thousands of miles on hub gears, and I won't go back. Thank you again for a very honest job!

[flpirate]

It's incredible on how our minds have grown sense the invention of the wheel. Just making all those little parts and putting it all together and creating that piece of machinery. Loved the video, Thanks.

[blomy]

I think you need to accept the challenge of trying to clean it up and get it back together . No need to pack it full of grease just some oil to lubricate but we need to see it work again .. Please

[AlmostBipedal]

Just as we all suspected, it works by magic!
You've just doen what must of us would love to do, but wouldn't dare do so with our own hubs.
Thank you.

[litvinenkoalexander]

I started seriously to do mathematics when I was 13, now I am 43. The whole 30 years I permanently improved my math skills. Now I am a math teacher at University. I saw very complex theorems and proofs. But, I must say, that the construction of this rare gear hub is very complex. I am very much impressed by people who invented it.

[d]

just play this video backwards to figure out how to put it back together lol

[TimHollingworth]

This reminds me of the time I pulled apart my 24mm-105mm Canon lens! It was a 3 dimentional puzzle from hell and all the time trying to keep the glass free from finger prints. I did get it back together but was tempted to put the 100's of pieces in the bin! I too would love to see this amazing geometrical puzzle put back together again and hopefully working too.

[goijehudim]

I never heard "here" so often in my life!

[timgarland]

Three observations:
1. It really makes you appreciate a cassette and derailleur system.
2. This has a large "ick factor"! Have you considered a parts washer?
3. Great advice at the end about taking one apart!

[trekkie]

Wait, is this the first time RJ hasn't been able to put something back together?!

[truckertom]

RJ, i do not think that you are the kind of man that would let this kind of challenge beat you, i think there is for sure going to be a Eureka moment, and the put back video is some thing for the future, in the immortal words of Sean Connery, 007 "Never shay Never, Kah peesh"

[Flippingbiscuits]

Take a shot if you hear “in here” lol awesome video

[thetedster]

Crazy complicated for a mass produced bike hub.

[a.v.k.]

Seems suspiciously like an extraterrestrial technology.

[litvinenkoalexander]

It is fascinating to see how engineers have been able to invent such complex details.

[andycapoyou]

It is the same as a 8 speed automatic, but all in 1 axle! And way tinyer! I have done the same with a Sram I-motion 9, and it is a nice challenge. Thank hell I had a good day and did not throw the fucking thing thru the window, It still works after 5 years and lots of miles after.
When you reasemble, bath it in ATF, Works wayyy better

[marblox]

OMG - this is one complicated gizmo. I'm glad I saw you take it apart because now I don't have to do it.

[Joseminario]

Lol.... "It works with magic" that is one complicated piece of machinery and u are one patient dude. I would have thrown that in the trash halfway through crawled in the fetal position and started sobbing.

[KarlosEPM]

Finally something even RJTheBikeGuy finds hard to repair! Lol, thanks for your work sir!