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CHAINRINGS/COGS/CHAINS GALLERY last updated 1/28/06
When I was in Tokyo in October, 2005 at a swap meet, I saw this
151 mm BCD Campy track chainring with the large shoulder on the
inside. BUT, it was 3/32"!! This was impossible. I had never seen
this before- I don't believe that any 151 BCD track rings, (with shoulder) were
made with 3/32" width. I showed it to some knowledgeable Japanese
collectors, and at first there was excitement, because what they saw was
what I saw... an impossibility! Then one noticed that both the shoulder
and the teeth had been very nicely ground down, (picture doesn't do it justice).
This was confirmed when I looked at the tooth profile from the edge- it was not
symmetrical. It had been ground down on one side only. So, what we had was a 50T
151 3/32" road ring, (less common) made from a 52T 151 1/8 track ring,
(more common). I bought it.
German company Wippermann made this inch-pitch block chain for the most serious track racers