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were there any classic rear derailers with 40+ chain wrap capacity?

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were there any classic rear derailers with 40+ chain wrap capacity?

Old 07-13-13, 05:56 PM
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onesmalldrop 
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were there any classic rear derailers with 40+ chain wrap capacity?

I'm in the midst of overhauling the components on my beloved '87 Peugeot frame, and I'm toying with the idea of upgrading to a 24-46 triple chainring. Problem is, with my 11-32 cassette, I'd need a wrap capacity of 43, which seems to be way beyond the range most old-school derailers, even the long-cage ones. (I'm currently using a dreamy long-cage Suntour V GT Luxe, max wrap 36). I realize I could just get a Shimano Deore, but it would look so out of place on a classic bike, and I'd love to stick with something old, be it Suntour, Shimano, Campy, Simplex, whatever. Anyone know of any high-capacity classic derailers? Or, heck, even an old-style-looking one--just something that's fits, visually?
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Old 07-13-13, 06:08 PM
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MalcolmsFrejus
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https://www.disraeligears.co.uk/Site/...erailleur.html

Claimed 42.
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Old 07-13-13, 06:31 PM
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https://www.disraeligears.co.uk/Site/...35_SGS%29.html

38 rated, but 40 is easy to do if you size the chain carefully.

Here it's used with a 52, 40 & 28t crankset with a 14-32 freewheel;

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Old 07-13-13, 06:48 PM
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Gran Turismo?

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Old 07-13-13, 06:56 PM
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The old Shimano Light Action (long cage) claimed a Max cog of 34, with total cap at 40
https://www.disraeligears.co.uk/Site/...32_SGS%29.html
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Old 07-13-13, 06:59 PM
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^ that and the Rally are my two favorites to look at
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Old 07-13-13, 07:13 PM
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The Sachs-Huret would be my choice. But also note that you may not need the full capacity of 43 teeth if you avoid using the 24 tooth granny with the smallest cogs of the cassette. Usually the granny ring is only used with the largest few cogs on the cassette which would let you get away with a RD with substantially less capacity. And if you do accidentally shift into a granny-small combination the chain will just have some slack in it until you shift into a more appropriate gear.
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Old 07-13-13, 08:02 PM
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Depends on what you mean by "classic," but I like the Huret Duopar.
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Old 07-13-13, 08:58 PM
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I think any rear cog with 40 teeth is sort of a classic, already.
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Old 07-13-13, 09:24 PM
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https://www.disraeligears.co.uk/Site/...system%29.html

Suntour XC 3 pulley @38. I picked one of these up in the C&V 4/s.

In action:
https://www.youtube.com/watch?v=5HKmDrBuMrQ

similar is the lepree:

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Old 07-13-13, 10:03 PM
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Originally Posted by onesmalldrop View Post
I'm in the midst of overhauling the components on my beloved '87 Peugeot frame, and I'm toying with the idea of upgrading to a 24-46 triple chainring. Problem is, with my 11-32 cassette, I'd need a wrap capacity of 43, which seems to be way beyond the range most old-school derailers, even the long-cage ones. (I'm currently using a dreamy long-cage Suntour V GT Luxe, max wrap 36). I realize I could just get a Shimano Deore, but it would look so out of place on a classic bike, and I'd love to stick with something old, be it Suntour, Shimano, Campy, Simplex, whatever. Anyone know of any high-capacity classic derailers? Or, heck, even an old-style-looking one--just something that's fits, visually?
Campy gran Tourismo or Shimano Crane will work
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Old 07-14-13, 07:25 AM
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Thank you all for the replies! Some very helpful info, especially the point about not needing the full capacity as long as you avoid running the big ring in front with the smallest gear in back. On reconsideration though, I think I've decided to stick with my trusty Suntour V and just max it out with a 34-48 double in front; this'll give me a big climbing benefit over the 42-52 that's on there now, which is the main reason I want to switch.
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Old 07-14-13, 08:29 AM
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https://www.disraeligears.co.uk/Site/...285900%29.html

Claimed 40. I'm loving mine right now. And it's appropriate for a mid-80s bike too. Although I think your current approach is quite sensible too.
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Old 07-14-13, 08:36 AM
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Originally Posted by onesmalldrop View Post
Thank you all for the replies! Some very helpful info, especially the point about not needing the full capacity as long as you avoid running the big ring in front with the smallest gear in back. On reconsideration though, I think I've decided to stick with my trusty Suntour V and just max it out with a 34-48 double in front; this'll give me a big climbing benefit over the 42-52 that's on there now, which is the main reason I want to switch.
You might be better served by going with the triple and running a smaller rear cassette so you don't run into RD capacity problems. I did that when I recently rebuilt my Bridgestone RB-1 and decided to go with a triple (48-36-24) and a 7 speed freewheel in the rear (12-24). The point is I'd play around with gear ratios a bit before making this decision. Also if you run a 5-6-7 freewheel rather than a 8-9-10 cassette, the choice becomes easier and you should go with a triple.
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Old 07-14-13, 08:48 AM
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Early Deerhead was rated for 40. I recently sold one on fleecebay.
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Old 07-14-13, 08:49 AM
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Originally Posted by bikemig View Post
You might be better served by going with the triple and running a smaller rear cassette so you don't run into RD capacity problems. I did that when I recently rebuilt my Bridgestone RB-1 and decided to go with a triple (48-36-24) and a 7 speed freewheel in the rear (12-24). The point is I'd play around with gear ratios a bit before making this decision. Also if you run a 5-6-7 freewheel rather than a 8-9-10 cassette, the choice becomes easier and you should go with a triple.
Ooh, interesting. I hadn't really considered that. Now you've got me thinking 12-26 in the back with 24-46 triple up front... tempting.

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Old 07-14-13, 09:26 AM
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Originally Posted by onesmalldrop View Post
Ooh, interesting. I hadn't really considered that. Now you've got me thinking 12-26 in the back with 24-46 triple up front... tempting.
You don't need a large capacity RD with this set up:

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Old 07-14-13, 09:48 AM
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I have not chimed in as yet, but FWIW, I frequently run 24-48 triple front with 13-34T freewheels (45T range as I calculate it). I set the chain length up for the 48-34 gear figuring that I won't pull the derailleur apart if I go into that gear. I don't worry about the RD. The fact is that it only becomes an issue with granny-gear to the bottom 1-3 cogs on the freewheel, which I cannot think of a reason to ever be in those gears unless you have some sort of really wide alpine gearing. I am using a variety of long cage RD's with this set up including Deore, Deore XT, Deore DX, Suntour Cyclone (old and new versions), and a Vx.
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Old 07-14-13, 10:09 AM
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You make a very good point! I hadn't really been thinking about max wrap as a flexible value, but it totally is. I'm realizing now that I can just stick with the derailer (max 36) and cassette (11-32) that I already have and go with the 24-46 triple, so long as I avoid the smallest four gears in back while using the granny gear in front, which, yeah, why would I ever want to use that combination anyway? I think this is the best idea.
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Old 07-14-13, 10:15 AM
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You will find that though your chain is rather slack, you can probably use all but the small ring to small cog combination.
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Old 07-14-13, 10:23 AM
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Good to know! I'll do some experimenting for sure. I just went ahead and ordered the triple, so decision made! Thanks for your input.
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