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Early Shimano freehub body curiosity
I had an interesting experience last week, which I present here as an
RBT curiosity. A friend had a cassette that was slipping under pressure. Turns out it wasn't the chain. I suspected gummed-up pawls, and suggested he bring it by for a look. It was a very old Shimano freehub, and sure enough the cogs turned clockwise with very little effort, but it didn't feel like munged pawls either. When I went to access the pawls (I've done this before with freehubs), even the inner part of the freehub body was turning clockwise (so I couldn't unscrew the left-hand-threaded bearing cup.) As I said, the hub was one of the oldest Shimano freehub designs (no bulge on the aluminum hub shaft). Rather than mount with the usual 10mm screw, this body mated to an aluminum spline on the outside of the hub. The aluminum spline was ripped up beyond recall. Curious, since the rider is an older recreational rider, though he was geared quite low. (Of course we had to replace the wheel). Finally found an image of one of these hubs at (where else): http://www.sheldonbrown.com/k7.html#advantages The drawing shows the spline on the right side of the hub body. Question 1: Anybody seen this failure before? Was it the reason Shimano dropped this design so quickly? Question 2: Does anybody want the freehub body? It should be reusable if you have a hub to match (though I can't imagine a situation where you'd need it - I'd expect other failure to be like this one.) Available for the price of shipping. Mark |
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