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Dahon Upgrade

Old 02-19-24, 07:27 PM
  #26  
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Originally Posted by Ron Damon
This is what the Shimano Zee RD-M640-SS part looks like. I should mention that I have been using the Zee RD since 2016. In fact, I am still using that same Zee RD today, almost eight years later. At $60, it ain't cheap, though.

Yeah, that additional pivot, near the mount, the opposite side of the linkage from the cage, that appears to a sprung joint and not simply adjustable. When someone mentioned a "clutched" RD, I had thought that was it, but now know (I think you pointed out?), any clutch would be in the top cage pivot. It all makes sense. My $13 Tourney TX GS is still working great and offers adequate clearance, but if I ever tour and need lower than 21 gear inches, that should offer a perfect solution to go up to 40 or 42 low cog. (Again, because my bike is a tough fit for chainline on a triple crank, because combination of fat seat tube and FD adaptor, prevents the FD cage from going in far enough for a triple, with a good chainline).
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Old 02-19-24, 07:39 PM
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Originally Posted by Duragrouch
Yeah, that additional pivot, near the mount, the opposite side of the linkage from the cage, that appears to a sprung joint and not simply adjustable. When someone mentioned a "clutched" RD, I had thought that was it, but now know (I think you pointed out?), any clutch would be in the top cage pivot. It all makes sense. My $13 Tourney TX GS is still working great and offers adequate clearance, but if I ever tour and need lower than 21 gear inches, that should offer a perfect solution to go up to 40 or 42 low cog. (Again, because my bike is a tough fit for chainline on a triple crank, because combination of fat seat tube and FD adaptor, prevents the FD cage from going in far enough for a triple, with a good chainline).
My Zee job, a veteran of several tours. Scraped and battered once or twice, but still in perfect working condition.

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Old 02-19-24, 07:45 PM
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Originally Posted by Ron Damon
My Zee job, a veteran of several tours. Scraped and battered once or twice, but still in perfect working condition.

Hmm, more marginal clearance than the video, but I think that demo was on a large wheel bike. What size rim, and what size low cog? I know you run a lot of 16" so I don't know if the above is 20". If the above pic is 16"/349 or 305, yeah, should be easy clearance on a 20"/406.

EDIT: But yeah, if the above is on 16", what amazing possibility now for fully external gearing on 16", especially with a 9 tooth high. A Dahon Curl or Brompton with same, that could make a convert out of me, at least as a travel bike.

Last edited by Duragrouch; 02-19-24 at 08:24 PM.
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Old 02-20-24, 05:07 AM
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Regarding my earlier statements about value these days, just saw, $1399, free shipping. Looks similar to Tern GSD, even has similar side decks, at a small fraction of the price:

Last edited by Duragrouch; 02-20-24 at 05:10 AM.
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Old 03-25-24, 12:14 PM
  #30  
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So many roadblocks with international purchasing. Wire transfer red tape, extreme shipping costs and refusal by international dealers to participate in trade are making obtaining the Mu Pro almost impossible. I have redirected my focus on upgrading my current folder stable until another possible solution presents itself.
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Old 03-25-24, 07:56 PM
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Originally Posted by Duragrouch
Regarding my earlier statements about value these days, just saw, $1399, free shipping. Looks similar to Tern GSD, even has similar side decks, at a small fraction of the price:
I know the smaller rear wheel is practical, but it looks so.... wrong (*shivers*)
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Old 03-25-24, 08:24 PM
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Originally Posted by CrimsonEclipse
I know the smaller rear wheel is practical, but it looks so.... wrong (*shivers*)
At least it's not sporting an SGS RD. (*wink*)
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Old 03-25-24, 08:36 PM
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Originally Posted by CrimsonEclipse
I know the smaller rear wheel is practical, but it looks so.... wrong (*shivers*)
I noticed immediately and I agree, though many motorcycles have smaller rear wheels. I'm sure the larger front provides better ride, but I still like the approach of the Terns using fat and strong 20" wheels.
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