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Coaster brake IGH

Old 06-05-17, 08:03 AM
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Coaster brake IGH

Is it true that coaster brake will ruin the internal of IGH?

I saw a youtube reviewer say the metal particles that come off of the coaster brake pad can easily migrate into the IGH and wear out the internal quickly.

I'm just researching the Sturmey Archer 3 spd coaster hub.

Last edited by mtb_addict; 06-05-17 at 08:20 AM.
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Old 06-05-17, 08:13 AM
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Coaster brake versions of SA 3 speeds have been around forever, and MOST of them still work. Don't believe everything you hear on the interwebs.
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Old 06-05-17, 08:19 AM
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Originally Posted by corrado33 View Post
Coaster brake versions of SA 3 speeds have been around forever, and MOST of them still work. Don't believe everything you hear on the interwebs.
it makes sense though.
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Old 06-05-17, 08:48 AM
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Originally Posted by mtb_addict View Post
it makes sense though.
No, it doesn't. It sounds like a hairbrained theory by a self proclaimed "expert" on the internet.

Real world evidence (aka the many hundreds of thousands-millions of SA 3 speeds still around and in use today) far outweighs the "theory" of an idiot on the internet. (Not you... the other guy.)
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Old 06-05-17, 10:15 AM
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.
...I have disassembled and serviced some pretty old IGH coaster brake hubs, and noticed nothing along these lines.

There are things that go wrong with them. Just nothing like this IME. There was a problem with Shimano 3 speeds from the early years where the pawls would shatter sometimes, and that would usually trash the hub.

For that matter, even a single speed coaster brake hub has bearings that would be damaged by a bunch of metal particles floating around in there. I'm gonna put this one in the "guy doesn't have a clue, but wants to put it on the internet anyway" file.
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Old 06-22-17, 02:18 PM
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Originally Posted by corrado33 View Post
No, it doesn't. It sounds like a hairbrained theory by a self proclaimed "expert" on the internet.
Originally Posted by 3alarmer View Post
.
I'm gonna put this one in the "guy doesn't have a clue, but wants to put it on the internet anyway" file.
The guy's name is Sheldon... LoL
https://www.sheldonbrown.com/internal-gears.html

A coaster brake in an internal-gear hub is, all in all, a poor idea because of the wear particles it generates, and because you can't use oil lubrication.
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Old 06-22-17, 02:22 PM
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Originally Posted by mtb_addict View Post
This guy's name is Sheldon... LoL
https://www.sheldonbrown.com/internal-gears.html
First you said it was a YouTube reviewer, now you reveal that Sheldon says it. I hope you had fun, but Sheldon is not infallible. Bad idea or not, Sturmey 3sp coaster brake hubs have proven very hardy.
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Old 06-22-17, 02:42 PM
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Sturmey Archer 3 speeds with coaster brakes do have a long history . Were you born after 1950 ?

.... then they have been around forever, as far as your lifespan goes..
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Old 06-22-17, 02:59 PM
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Originally Posted by mtb_addict View Post
The guy's name is Sheldon... LoL
https://www.sheldonbrown.com/internal-gears.html
It's not an issue.
Coaster brakes needs to be greased with a grease that stays put.
That means a fairly sticky grease.
There is no important migration of wear particles since they get trapped in the grease that has to stay there anyhow for the brake to work.
If a coaster brake is lubed with a grease that flows away, you'd be in trouble even without embedded wear particles.

Now, sticky grease on moving parts create greater losses than runny oils on moving parts.
IGHs have lots of moving parts.

So if you can, there's a slight advantage to using oil-lubed IGHs instead of grease-lubed IGHs.
And oil will happily go all over the place.
So an oil-lubed, coaster-braked IGH might not be such a hot idea.
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Old 06-22-17, 07:19 PM
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Originally Posted by mtb_addict View Post

I'm just researching the Sturmey Archer 3 spd coaster hub.
Originally Posted by mtb_addict View Post
The guy's name is Sheldon... LoL
https://www.sheldonbrown.com/internal-gears.html
...congratulations. Good luck in finding assistance here in the future. Fortunately, you'll always have Youtube.
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Old 06-22-17, 10:29 PM
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I have an old Sturmey-Archer S3C hub, that's waiting to be built into a wheel. I've completely cleaned its innards, so it awaits lubrication before I can use it.

But I would observe that the brake band engages with the inner surface of the hub shell, which is also the oil sump for the gear train. The copy of the Sutherland manual at Sheldon Brown's website says to grease the brake band. There's no way to keep oil out of the brake. The original rebuilding instructions from S-A don't mention grease, so I suspect it was intended to be an oil lubed hub. I'm inclined to grease the band when I put this hub into service.

The old S-A hubs were not sealed, so the oil tends to leak out. As a result, fine metal particles will be gradually washed out.
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Old 06-23-17, 11:22 AM
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Originally Posted by mtb_addict View Post
Is it true that coaster brake will ruin the internal of IGH?

I saw a youtube reviewer say the metal particles that come off of the coaster brake pad can easily migrate into the IGH and wear out the internal quickly.

I'm just researching the Sturmey Archer 3 spd coaster hub.
Its hyperbole. Im sure there is some truth to it, BUT 3 speed IGH with coaster brake are usually very durable. I have a lot of 1st hand experience with the old style Sachs Torpedo hubs and none have ever give up the ghost.
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