What kinds of Shimano Dura Ace and Ultegra Cassette Cogs do I have????
07-29-14, 11:41 AM
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What kinds of Shimano Dura Ace and Ultegra Cassette Cogs do I have????
I have a lot of new or pull off cogs from Shimano Dura Ace and/or Ultegra from cassettes.
Thing is that I cannot tell which type of cassette they belong to.
Any way to know what kind of Dura Ace or Ultegra cogs I have?
6xxx or 7xxx??
The colors of the cogs vary too...brown to grey to polished.
Any significance or way to determine category by this?
I found this link....
Shimano date codes
Is this accurate for two letter stamps found near the center of the cogs?
Thanks in advance.
Thing is that I cannot tell which type of cassette they belong to.
Any way to know what kind of Dura Ace or Ultegra cogs I have?
6xxx or 7xxx??
The colors of the cogs vary too...brown to grey to polished.
Any significance or way to determine category by this?
I found this link....
Shimano date codes
Is this accurate for two letter stamps found near the center of the cogs?
Thanks in advance.
07-29-14, 11:51 AM
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To my knowledge Dura and Ultegra cogs of the same year are identical dimensionally, and vary cosmetically only (also maybe in the specific metal allow and heat treat), and so you should have no problem matching up sets. (if they look the same they are, if not they may still be.
Note that in both series, all the sprockets are stamped, except for the smallest and possibly the 2nd which are machined from bar. That may cause some difference in the finish or shine, but nothing else.
Note that in both series, all the sprockets are stamped, except for the smallest and possibly the 2nd which are machined from bar. That may cause some difference in the finish or shine, but nothing else.
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“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin
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07-29-14, 06:51 PM
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As FB noted, for a given number of "speeds", almost all Shimano cogs including 105, Ultegra and Dura Ace cogs and spacers are interchangeable. What must match is the number of speeds (e.g. 8,9, etc.) the cogs are made for since as the number increased, the cogs got thinner as did the spacers.
07-29-14, 07:28 PM
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Aren't some Dura-Ace cogs made from titanium ?? Magnet test ?
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07-29-14, 07:29 PM
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Generally Ultegra cogs are shinier than D-A. In my experience Ultegra cogs are all steel. The larger D-A cogs are titanium and much lighter in weight. Check with a magnet, titanium is non-magnetic. Most of my experience has been with 9-speed cogs.
07-30-14, 07:52 AM
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What's the deal, you have a whole bunch of loose cogs floating around in a box or whatevs and you need to sort them?
Or do you have complete cassettes that just need identifying?
Posting pics would help a hell of a lot.
Pretty sure the letters on cogs refer to the cogs they belong next to.
For instance, a 15t might be made to go between a 14t and a 17t, or between a 14t and a 16t; the shift gates are different for each. IIRC chainrings are similar but just with a single letter, eg A, B, C, or D for road rings, or Z, X, Y for MTB stuff, denoting which set they're from.
Or do you have complete cassettes that just need identifying?
Posting pics would help a hell of a lot.
Originally Posted by spinderello
Is this accurate for two letter stamps found near the center of the cogs?
For instance, a 15t might be made to go between a 14t and a 17t, or between a 14t and a 16t; the shift gates are different for each. IIRC chainrings are similar but just with a single letter, eg A, B, C, or D for road rings, or Z, X, Y for MTB stuff, denoting which set they're from.
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Half-step triple, using double gear ~~~ 6400 STI rebuild walkthrough ~~~ Want 8/9/10s @126mm OLD? OCR. ~~~ Shimano cassette body overhaul ~~~ Ergopower Escape wear repair ~~~ PSA: drivetrain wear
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Sheldon Brown's bike info ~~~ Park Tools repair help
Half-step triple, using double gear ~~~ 6400 STI rebuild walkthrough ~~~ Want 8/9/10s @126mm OLD? OCR. ~~~ Shimano cassette body overhaul ~~~ Ergopower Escape wear repair ~~~ PSA: drivetrain wear
List of US/Canada bike co-ops ~~~ Global list
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