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Triplize a Shimano 600 double?

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Triplize a Shimano 600 double?

Old 02-17-20, 03:08 PM
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Chr0m0ly 
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Triplize a Shimano 600 double?

https://www.bikeforums.net/classic-v...nk-6207-a.html



I've installed the double ring version of this crank on my wife's bike, and she needs the granny gear.

Is this something I can add on? I believe I'd need to source the granny, the longer axle, and possibly longer sleeved allen bolts to go through the third gear?
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Old 02-17-20, 03:26 PM
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The 6206 and 6207 are very different cranksets.

The 6206 is effectively the 600/XT level triple crank with the 110/74 BCD pattern.

The 6207 is a 130 BCD double crank.
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Old 02-17-20, 11:37 PM
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So different crank entirely.
The original set up that came on her bike, an '88 ST400, was a suntour that had the threaded holes to accept a granny gear, but I swapped it for the shimmy 600 to use a set of 165mm cranks.

So find 165mm cranks and a granny for the suntour...

I wonder if I can find a full triple with 165's on fleabay...

I'll put up WTB post in the for sale section 👍
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Old 02-18-20, 12:29 AM
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If a 34T granny is small enough, you could get one of those dual-pattern 110/130 chainrings to use as the “triplizier.”
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Old 02-18-20, 01:35 AM
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Not sure if I understand, is this it: OP has some 165 mm cranks with a 130 mm BCD, and he wants to put a small granny ring on?

Then a 130 BCD triplizer ring should work, no? A triplizer ring replaces the inner ring of the double and becomes the middle ring of the triple. It has holes at 130 BCD to attach to the crank, and also holes at 74 BCD to attach the granny. So you need
  • triplizer ring
  • 74 mm BCD granny ring
  • chainring bolts for the granny
  • longer spindle
Lots of companies made or still make triplizer rings for 130 BCD, such as TA, Willow, Thorn, Stronglight, FSA... some more I can't remember.

Here's a later model TA:


Here's a Thorn (from SJS Cycles in the UK):

The TA has ramps and pins to aid with front indexed shifting, if you're into that. I think the Thorn is old-school, intended for friction shifting on the front derailer. I've never actually held a Thorn version in my hands though. I know the older-version TA triplizer was without ramps and pins.

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Last edited by bulgie; 02-18-20 at 02:05 AM.
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Old 02-18-20, 02:02 AM
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Here's my wife's Dura-Ace 7400 in 165 mm, with a Stronglight triplizer.


I like the Stronglight, but it's more work than the TA, Willow or Thorn, because it doesn't have clearance for the 5 shelves off the inside of the spider arms, so you need to saw the shelves off. Not too difficult if you're handy, and you have a vise with soft jaws, a hacksaw, and a flat file to dress down the saw marks. Takes me about 15 minutes, but most people would be reluctant to take a hacksaw to a nice crank. Especially when there are other triplizer rings that don't require any sawing/filing.

My advice is get a TA. They're very well made, out of good hard alloy, and look great. $54 plus shipping from Bike24 in Germany https://www.bike24.com/p2141592.html
or $88 plus cheaper shipping from Peter White in the USA https://www.peterwhitecycles.com/ta-...ings.php#alize (scroll down to "tripleizer" -- that's the way he spells it)
I leave it to you to decide which is a better deal once shipping is added in, but shipping from Germany will probably be slower too, a factor if you're in a hurry.

Good luck, let me know if I can answer any other questions.

If I completely misunderstood your situation, then -- never mind!

Mark B in Seattle
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Old 02-18-20, 04:33 AM
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Just here to say, those triplizers work great.
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Old 02-18-20, 06:33 AM
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Originally Posted by 52telecaster View Post
Just here to say, those triplizers work great.
+1.
Willow triplizer on Dura Ace 7400 crank:





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Old 02-18-20, 07:11 AM
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Spindle length for the FC-6206 is 121.5. Maybe the will help with your situation.
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Old 02-18-20, 07:25 AM
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Originally Posted by Chr0m0ly View Post
https://www.bikeforums.net/classic-v...nk-6207-a.html



I've installed the double ring version of this crank on my wife's bike, and she needs the granny gear.
Once you sort out the granny gear on the crank, you may need to go long cage on the RD if that bike has the short version.
I swapped the short cage on a shimano 600 for a longer one from another shimano sis RD. That helped a bunch with the small gear combinations.
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Old 02-18-20, 04:20 PM
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Originally Posted by Chuckk View Post
I guess you've already considered a 39 low on the front and a 32 with a long cage derailleur on the back?
A lot simpler.
no I have NOT!! I let my touring fettish get in the way! Sheesh, I like the simple answer.
We aren't going up mountain passes just the odd steep hill, and that would likely do the trick.



This is what I'm working with, it came with a long cage OEM, and the original crank had the spot for a granny, I just swapped it out to use the 165 crank arms for her.
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