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Question/Confirmation on a Suntour Cyclone M-II Rear Derailleur

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Question/Confirmation on a Suntour Cyclone M-II Rear Derailleur

Old 04-03-19, 02:05 PM
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Question/Confirmation on a Suntour Cyclone M-II Rear Derailleur

I have a Cyclone II on the 84 Novara Randonee I am currently refreshing. My question is did this RD come with a cable tension adjuster? I don't think it did, in all the pictures on the web I see the cable housing runs right into the rear of the RD body and from what I read on Disraeli Gears Suntour was going light and Aero with this RD to the extreme so my theory is the cable tension screw got dropped in favor of light and aero....or am I missing something?



cabled up


cable housing as it enters back of derailleur body


SunRace MD10 for comparison with cable adjuster with spring
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Old 04-03-19, 02:15 PM
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No, no tension adjuster. I have a couple of these, as well as a Blue Line and first/gen Cyclone, and none have adjusters. Didn't those start appearing on derailleurs with index shifting? I honestly don't know, genuinely curious.
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Old 04-03-19, 02:31 PM
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Barrel adjusters for cable tension are ubiquitous today because of indexing. They weren't critical in friction drivetrains.
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Old 04-03-19, 03:08 PM
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This VGT Lux has an adjuster, although I don't know why. I don't recall cables stretching enough to make it worthwhile.

Steve in Peoria

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Old 04-03-19, 03:16 PM
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Originally Posted by noobinsf
No, no tension adjuster. I have a couple of these, as well as a Blue Line and first/gen Cyclone, and none have adjusters. Didn't those start appearing on derailleurs with index shifting? I honestly don't know, genuinely curious.
Barrel adjusters are important to make indexed shifting work reliably, but early SunTour non-indexed derailleurs also had them (e.g. V-GT, V-GT Luxe, V-Luxe, etc.). I don't think any of the Cyclone or Superbe models had them, though.
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Old 04-03-19, 03:37 PM
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Actually, the vast majority of SunTour's friction rear derailleurs had had cable tension adjusters. The exceptions were Cyclone, Sprint, Superbe and Superbe Pro. In other words, the feature was dropped for the racing models, possibly as a weight concession or maybe they were just copying Campagnolo.
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Old 04-03-19, 03:52 PM
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Ah, I see. I am certain about the Cyclones I have, but maybe I am mistaken about the Blue Line -- it's been a while since I've handled that one.
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Old 04-03-19, 04:43 PM
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Even the Ar/ARx lineup didn't have a tensioner.
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Old 04-03-19, 08:07 PM
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Thanks all its good to know I wasn't just missing something obvious
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