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Have chainring teeth become more sawtoothed?

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Have chainring teeth become more sawtoothed?

Old 07-13-22, 03:37 PM
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elcyc
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Have chainring teeth become more sawtoothed?

Im talking BRAND NEW chainring teeth, not worn ones.
Seems like those from about 12 years and before were more squared off.
Hmm does this have anything to do with better meshing with MODERN chains?
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Old 07-13-22, 03:42 PM
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Some have tooth profiles that are designed to help keep the chain on, especially those intended for use with 1X drivetrains.

Example:

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Old 07-13-22, 04:20 PM
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Got triples. All Shimano.
For example:
shimano fc m410




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Old 07-13-22, 11:11 PM
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...those are custom cut and ramped to ensure quicker and easier pickup of the chain as you shift.
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Old 07-14-22, 11:05 AM
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The sharktooth profile cuts the wind better at the top, where ground speed is highest.
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Old 07-15-22, 08:54 AM
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Originally Posted by BlazingPedals View Post
The sharktooth profile cuts the wind better at the top, where ground speed is highest.
And the chain completely covers the teeth. Just how gullible do you think we are
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Old 07-15-22, 10:05 AM
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that first one from Rolla looks like it belongs in a table saw.
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Old 07-15-22, 11:52 PM
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It's a CONSPIRACY, folks: right outta the factory, they are shaped to LOOK WORN ... so in a few months, when your bike starts havin' shiftin' issues, you'll whip out your phone and Google "bike shifting issues" and Google Images will suggest what a worn chainring looks like:




"Now how when wuz da last time I replaced my WHOLE drive train? Hmmm."
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Old 07-21-22, 09:11 AM
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Originally Posted by elcyc View Post
I’m talking BRAND NEW chainring teeth, not worn ones.
Seems like those from about 12 years and before were more squared off.
Hmm… does this have anything to do with better meshing with MODERN chains?
There used to be what was known as cross-chaining but Shimano fixed that by going to 1x sawtooth chainrings and 12-speed cassettes.
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