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Old 01-30-08, 04:17 PM   #1
datlas
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shimano hyperglide chain

I tried a search on this topic, with no luck.

I need to replace my chain soon...my drivetrain is dura ace 7400 6 speed freewheel.

I have seen hyperglide HG models with various numbers after them. I imagine the higher the number, the thinner the chain...to work with the narrower cluster. But what's the real difference, and which one would work best with my standard-6 speed spacing? I am guessing I want the HG-50 but not sure.

Doug
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Old 01-31-08, 08:51 AM   #2
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Doug, the numbers refer to the model of the chain not the thickness. Thickness is dictated by the number of speeds...10 speed chains are narrower then 8-speed chains. Any of the HG/IG 7/8 speed chains will work.

50, 70 and 90 series chains differ in materials used.
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Old 01-31-08, 12:19 PM   #3
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Originally Posted by miamijim View Post
Doug, the numbers refer to the model of the chain not the thickness. Thickness is dictated by the number of speeds...10 speed chains are narrower then 8-speed chains. Any of the HG/IG 7/8 speed chains will work.

50, 70 and 90 series chains differ in materials used.
Jim,

Thanks so much for the clarification!

Doug
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Old 01-31-08, 12:26 PM   #4
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FWIIW, after doing some research, I decided on a SRAM PC-870 for about $16 (with Powerlink) for the rebuild of my old Trek 400 with 7-speed Shimano drivetrain.

- Mark
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Old 01-31-08, 12:26 PM   #5
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I've had no problems running Sedis or Sram on my 7400
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