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Interesting freewheel hub - cartridge bearings

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Interesting freewheel hub - cartridge bearings

Old 07-13-19, 07:38 AM
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Spaghetti Legs 
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Interesting freewheel hub - cartridge bearings

Iím currently building up a shop spares city bike for my wife. Itís going to be a 7 speed flatbar bike. I have a set of wheels, no name English thread freewheel hub on Wolber Gentleman 81 rims, that have been sitting in my shop for a couple of years awaiting overhaul. I removed the NDS locknut but the cone was weird in that it was pretty tight, so I went to drive side and loosened the ďconeĒ only to find the whole axle threaded out like this. I pried off the bearing seals and they looked pretty good so I stuffed some Phil Wood grease in and put everything back together. Spins pretty well. Iím assuming this is from late 80ís or early 90ís. First time Iíve come across a freewheel hub with cartridge bearings.



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Old 07-13-19, 09:53 AM
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Not entirely uncommon, the Specialized road/touring hubs were like that.
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Old 07-13-19, 12:43 PM
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A nice very common bearing (SKF 6001-RS1), can be found for about $5.00 each.

Seals, 1

Material Standard, SAE 52100

Bore, 12mm .4724" -.0003

Outside Diameter , 28mm 1.1024" -.0004

Width, 8mm .3150" +.0000/-.0050

Max Fillet Radius, .012

No. Balls, 7

Ball Diameter, 3/16

Static Load, 500 lbs.

Dynamic Load, 805 lbs.

: Mike
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Old 07-13-19, 02:38 PM
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Probably Specialized. I have a set. Chrome covers that have Specialized on them. Very good hubs.
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Old 07-13-19, 06:52 PM
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You took the seal off. they come out as a unit

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Old 07-13-19, 07:14 PM
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It's a Sanshin. I think of them as Sanshin Gyromaster because that was the first I saw. Lots of slightly different versions. Sold as SunTour and Specialized. Also sold with no markings at all. Wonderful hubs. Really wonderful hubs. One of best ever.
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Old 07-13-19, 07:19 PM
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Iíve got suize hubs like that on my 84 pro tour, and a mixed set of Sansin and suntour superbe pro on my prelude that I found at the thrift store. Great hubs all around.
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Old 07-13-19, 11:38 PM
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Thanks all, good info. It does seem like a solid hub. No marks on it. These came on a bike I bought but can’t remember for sure which one.
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Old 07-15-19, 05:04 PM
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Here is my Specialized front hub. The lettering has worn off the dust cover, but the sealed band is still on. The rear still has the lettering, but no band.


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Old 07-15-19, 06:50 PM
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Originally Posted by Spaghetti Legs View Post
First time Iíve come across a freewheel hub with cartridge bearings.
Some months ago, I got very good input on this forum about how to locate, and install, replacement sealed bearings in my Avocet hubs. Now they are great, and only retiring them due to a frame swap needing 126mm (another thread on this forum). Not all that hard... once you are told how.

So I presume this is a rare combination?
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Old 07-15-19, 07:53 PM
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Bringing up the rear.......... with the faded Specialized script.


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Old 07-29-19, 10:59 AM
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I'm having the same issue with my DS rear wheel but my dust cover/cone doesn't quite come off. I tried pulling on the cone itself but it seems pressed into the dust cover. Any ideas?
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