Sprocket question

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  • Hi all, just installed a single speed sprocket on the other side of a track wheel - right hand side in the pic. When attempting to tighten, the chainwhip (1/8" chain specific) kept slipping off and upon closer inspection I noticed that the tooth profile is almost completely flat in comparison to teeth of the original sprocket on the left side which recede to a point. Teeth on all other sprockets I have are as per left hand side and I've never had issues with the chainwhip slipping off during any previous installations. Now I'm wondering if the right hand sprocket hasn't been machined properly and how this will affect chain engagement, or if it could damage the chain? It's VeloSolo brand if it helps. Thanks for any assistance :-)

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    • VeloSolo Sprocket.JPG
  • Is the chain whip definitely 1/8" specific? I can't think of any reason why it would slip due to the width of the teeth unless it was a 3/32" whip which was only engaging on the top edges of the beveled teeth.
    Velo Solo sprockets are very high quality and will likely out last all the others...

  • Thank you, that gives me some comfort - I do usually like VeloSolo components but haven't seen something like this before. Chainwhip is definitely 1/8" specific, mounted dozens of other sprockets with the same tool. It works with the VeloSolo sprocket but only when the chain is completely wrapped around the whole circumference of the sprocket and tension carefully applied, I didn't have to engage the chainwhip so carefully with the others.

  • The following is just my observation - I can't quote any other authority for it.

    In olden days all sprocket teeth were pointed, including those on derailleur multiple free wheels. At some point (1950's?) it occured to someone that gear changing would be improved by removing those points and having flat topped teeth. This quickly became the norm for derailleurs, but single sprockets stayed the same, at least to start with.

    More recently some flat topped fixed sprockets have appeared, perhaps because the makers had only ever seen derailleur sprockets. It might seem that the chain would 'derail' more easily without the points, but I've worn out at least one of these modern sprockets without having any trouble - so maybe the points were as pointless as the flange under the teeth of some ancient chain rings.

    Or perhaps they are there to prevent chain whips from slipping !

  • Ha, good observation. Anyway the VeloSolo sprocket test ridden and it's actually lovely, ordered two more.

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Sprocket question

Posted by Avatar for boyan_t @boyan_t