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Hi From Vancouver Canada

Old 06-18-19, 12:22 PM
  #1  
va7db
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Hi From Vancouver Canada

Hi, Newbe here.....I have questions about the Shimano SG7R40 Internal Gear Hub.
I recently purchased one off a fellow who assured me it worked..... :-) I cannot understand how the handlebar cable mechanism activates the selected gears, there is no mechanical connection I can see because the cable attachment at the hub end simply rotates a square toothed gear......the problem is that this gear doesn’t seem to rotate Anything on the shaft ? It doesn’t have a cam or any means of pushing on the shaft either?
I checked a later model 11 speed hub on a friends bike and it has a definite spring tension to return the cable to the handlebar selector......mine doesn’t have any such springy feeling? Any Info / links appreciated before I go crazy :-)
Dave
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Old 06-20-19, 12:11 AM
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Siu Blue Wind
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Hi and welcome to Bike Forums!

Have you had the chance to go to the mechanics section here? There are a lot of friendly people who will help. Good luck!
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Old 06-20-19, 08:01 AM
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va7db
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Thanks, didn’t know there was a Mechanics section ;-) will go take a looksee :-)
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Old 06-20-19, 08:51 AM
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Hermes
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Welcome to Bike Forums.
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Old 06-20-19, 12:20 PM
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va7db
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Thanks mate....
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