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Spacer for Suntour Freewheel

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Spacer for Suntour Freewheel

Old 10-12-17, 02:42 PM
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1989Pre
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Spacer for Suntour Freewheel

I was getting some grinding from my rear derailleur, Suntour Superbe Pro (5200, friction-only), and fiddled with the b-adjuster, but it seemed the screw was not long enough to get the derailleur (rated for 26T) far enough away from my 28T low sprocket to eliminate the grinding.
I thought I had to go to an Accushift derailleur, which I have, but I thought I'd try a different rear wheel: Instead of a Campy Record hub with Suntour New Winner, I put on the wheel with Royce high-flange and Sachs (same six-speeds, same 28T low gear). I took it for a ride, and there was no grinding.
Since I had to adjust my high limiter screw so that the derailleur would go into the 13T, I measured the difference between ends of axles and high gear cog. The difference seems to be about 3mm.
I don't know whether you need to know all of that, but what my question is: Since I am presently unable to find a Suntour freewheel spacer, will a Sachs or Regina do?
I want to be able to stay with the Superbe Pro derailleur because if its low weight.
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Old 10-12-17, 03:08 PM
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Why would a spacer do anything?
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Old 10-12-17, 03:45 PM
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Originally Posted by trailangel View Post
Why would a spacer do anything?
I haven't figured it out, either. I am just trying to put the Suntour freewheel in the same position that the Sachs occupies on the other wheel. Maybe that will work, maybe it is something that I haven't thought of. Yellow Jersey has 1.3mm Sturmey Archer spacers that will work.

Last edited by 1989Pre; 10-12-17 at 06:20 PM.
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Old 10-12-17, 03:46 PM
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Some mechanics suggest reversing the B-screw, if a longer screw isn't available. The reversed screw would add length to adjust the pulley distance, but be less convenient to adjust.
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Old 10-12-17, 04:17 PM
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Originally Posted by canklecat View Post
Some mechanics suggest reversing the B-screw, if a longer screw isn't available. The reversed screw would add length to adjust the pulley distance, but be less convenient to adjust.
Thanks. That might give me enough.
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Old 10-12-17, 06:13 PM
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Adjusting the wheel position in the dropout and playing with chain length can help when running large cogs.
However, on my one bike with a Superbe derailleur, I had to play around to get the 26 to work well.
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Old 10-12-17, 06:19 PM
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Originally Posted by Slash5 View Post
Adjusting the wheel position in the dropout and playing with chain length can help when running large cogs.
However, on my one bike with a Superbe derailleur, I had to play around to get the 26 to work well.
I've been thinking about the chain, too: I think it could use one more link for the setup that is a little grindy.
The funny thing is that it works with the Sachs just fine. Now.., to find out why!
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