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Sunrace Downtube Shifters

Old 11-07-20, 12:24 PM
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Jicafold
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Sunrace Downtube Shifters

So will these shifters work / fit on standard downtube shifter bosses if you remove them from this clamp-on band? I really don't care if they index or not...which they do for 7 speed Shimano...I just want to know if they will bolt up. Thank you.

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Old 11-07-20, 02:07 PM
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I would bet with 90% certainty that they will work. The industry has standardized on that type of boss.
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Old 11-07-20, 02:25 PM
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I'm not sure I get your deal, but I replaced my bar-end shifters with Sunrace downtube shift levers in 2008. The downtube didn't have bosses but 2 pegs, one on each side, that connected with a piece of threaded rod through a hole in the downtube, to hold the pass-throughs for the shift cables. They weren't useful mounts for the downtube shifters so I bought a 4-inch long #8 machine screw, 2 pieces of threaded alumin(i)um sleeve, enough unthreaded sleeve to make up the difference. The levers mounted perfectly on the sleeves.

I have an alumin(i)um frame; there's no downtube shifter made for that size frame, so I had to improvise. You sound as though you have a steel frame, which may be very different.
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Old 11-07-20, 04:30 PM
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The rear control is indexed-only, as far as I know, and they're on my only bike.
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Old 11-07-20, 04:42 PM
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Are those downtube levers? Clamp looks more like it's intended for one of those old 7 style stems. Regardless, I wouldn't assume anything about fit till you tried them.
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Old 11-07-20, 04:45 PM
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Bought a set of Sunrace index downtube shifters a few years ago. Have to be the worst shifters I’ve ever had.

John
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Old 11-07-20, 04:56 PM
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Originally Posted by noglider View Post
I would bet with 90% certainty that they will work. The industry has standardized on that type of boss.
+1
I'm ignorant about "road stuff", but it would be stupid to limit your market by not doing so.
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Old 11-08-20, 09:29 AM
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Originally Posted by Iride01 View Post
Are those downtube levers? Clamp looks more like it's intended for one of those old 7 style stems. Regardless, I wouldn't assume anything about fit till you tried them.
It's a 28.6 clamp size for regular size cro-moly. But anyhow, that was the point of asking this question...to see if anyone had tried that.

Originally Posted by noglider View Post
I would bet with 90% certainty that they will work. The industry has standardized on that type of boss.
Thank you. I think I'll give it a try.

Last edited by Jicafold; 11-08-20 at 09:33 AM.
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Old 11-08-20, 08:32 PM
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If you don't have a co-op with a bin of vintage shifters nor want to buy on ebay, I might try the ISO thread in the C&v subforum for something more appropriate ... like anything from Suntour or Shimano.
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