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Replacement derailleur for Peugeot UE8

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Replacement derailleur for Peugeot UE8

Old 10-20-21, 12:56 PM
  #1  
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Replacement derailleur for Peugeot UE8

I think I want to upgrade the simplex derailleur on my Peugeot UE8 and having read through some articles about upgrading vintage derailleur a I知 a little confused about whether a modern one will work.

can somebody suggest a decent, reasonably priced rear derailleur which is compatible directly or with an adapter claw.

thanks!


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Old 10-20-21, 01:23 PM
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The Peugeot UE8 did not come with very wide range gearing. Consequently, unless you're contemplating widening the gearing, about the only thing you may have to avoid are some of the narrow range racing derailleurs. The previous owner has already upgraded the shift system by eliminating the weak link Simplex Prestige shift levers, which were very flexible, resulting in high shifting effort. Personally, I'd go with a slant parallelogram, Shimano, indexing deralleur, despite the fact that you have friction shifting. They're widely available and give uniformly excellent shifting performance regardless of price range, with the differences being primarily weight, finish and to an extent, durability.
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Old 10-20-21, 01:50 PM
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Originally Posted by T-Mar View Post
The Peugeot UE8 did not come with very wide range gearing. Consequently, unless you're contemplating widening the gearing, about the only thing you may have to avoid are some of the narrow range racing derailleurs. The previous owner has already upgraded the shift system by eliminating the weak link Simplex Prestige shift levers, which were very flexible, resulting in high shifting effort. Personally, I'd go with a slant parallelogram, Shimano, indexing deralleur, despite the fact that you have friction shifting. They're widely available and give uniformly excellent shifting performance regardless of price range, with the differences being primarily weight, finish and to an extent, durability.
Thanks for the reply. So pretty much any modern Shimano will work? Do I need a claw adapter to fit it?

something cheap and cheerful like this?
https://www.ebay.co.uk/itm/203207203...IAAOSwMi5eOrig

Last edited by Patrick398; 10-20-21 at 01:56 PM.
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Old 10-20-21, 02:00 PM
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Originally Posted by Patrick398 View Post
Thanks for the reply. So pretty much any modern Shimano will work? Do I need a claw adapter to fit it?

something cheap and cheerful like this?
https://www.ebay.co.uk/itm/203207203...IAAOSwMi5eOrig
Another possibility is to upgrade to a SunTour VG series (you can get GT-long cage or Vg-t short cages). They shift extremely well for friction, and won't look out of place in many builds. They also have a tendency to have claws as much as they are without.

Also, SunTour Leprees might be doable.
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Old 10-20-21, 02:10 PM
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Originally Posted by jdawginsc View Post
Another possibility is to upgrade to a SunTour VG series (you can get GT-long cage or Vg-t short cages). They shift extremely well for friction, and won't look out of place in many builds. They also have a tendency to have claws as much as they are without.

Also, SunTour Leprees might be doable.
sweet, thanks. I値l look into those too. If I知 replacing it I may as well put something decent in there
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Old 10-20-21, 02:24 PM
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Originally Posted by Patrick398 View Post
sweet, thanks. I値l look into those too. If I知 replacing it I may as well put something decent in there
And along with what T-Mar said, there are a few Shimano vintage items that would be very nice if a clawed one is found...
Shimano Golden Arrow 105 https://velobase.com/ViewComponent.a...=108&AbsPos=19
If you can find a cheap Titlist-GS, they are really cool looking and shift pretty decently. https://velobase.com/ViewComponent.a...5-2453a431eb15
500 GS https://velobase.com/ViewComponent.a...=108&AbsPos=25
400 FF https://velobase.com/ViewComponent.a...=108&AbsPos=10
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Old 10-20-21, 03:13 PM
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Just put up a WTB in the C & V for sale forum. Something will pop up at a reasonable price.
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Old 10-20-21, 03:40 PM
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Originally Posted by bikemig View Post
Just put up a WTB in the C & V for sale forum. Something will pop up at a reasonable price.
Patrick is in GB 🇬🇧 I think? There should be bundles of fun parts over there.

Is there an image of the bike as it sits now? What year is it?
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Old 10-20-21, 03:51 PM
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Originally Posted by jdawginsc View Post
Patrick is in GB 🇬🇧 I think? There should be bundles of fun parts over there.

Is there an image of the bike as it sits now? What year is it?
Yes I知 in Blighty. I should probably just head to the bike monger again tomorrow, they sorted my wheels out so I知 sure they can throw some derailleurs at me.

Not sure what year it is, 70s is all I know. The image is of the bike as it sits now
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Old 10-20-21, 04:28 PM
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Originally Posted by Patrick398 View Post
Yes I知 in Blighty. I should probably just head to the bike monger again tomorrow, they sorted my wheels out so I知 sure they can throw some derailleurs at me.

Not sure what year it is, 70s is all I know. The image is of the bike as it sits now
I am embarrassed...I just looked at a map to see what city Blighty was close to if I was searching EBay Britain...then remembered the moniker/nickname...

Anywho...
https://www.ebay.com/itm/17498056763...AAAOSwzU1hay2l
https://www.ebay.com/itm/30307545392...IAAOSw2EJcdBe4


And a few SunTours
https://www.ebay.com/itm/12495988950...4AAOSwVgVgxyWd
https://www.ebay.com/itm/27433202311...kAAOSwkU9ej0Z9

And the Gold Standard
https://www.ebay.com/itm/40323545444...kAAOSwTvtha9Ng
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Old 10-20-21, 04:35 PM
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suntour vx for the win as noted above https://www.ebay.com/itm/40323545444...kAAOSwTvtha9Ng
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Old 10-20-21, 04:41 PM
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Originally Posted by jdawginsc View Post
I am embarrassed...I just looked at a map to see what city Blighty was close to if I was searching EBay Britain...then remembered the moniker/nickname...
haha sorry I should have thought that may not have travelled well. I値l stick to Albion from now on 😉

Thanks so much for all those suggestions! So they値l all fit the current frame without any issues? I was reading something about simplex dropouts not being compatible with many derailleurs. The way this fix up has gone so far I知 just assuming every single component on this bike has some idiosyncrasy that makes it a pain in the hole.

I知 not even sure if this frame has a simplex drop out
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Old 10-20-21, 04:42 PM
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Originally Posted by squirtdad View Post
suntour vx for the win as noted above https://www.ebay.com/itm/40323545444...kAAOSwTvtha9Ng
Yes that痴 the one I was drawn to, shiny shiny. It痴 costs nearly as much as I paid for the bike ha
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Old 10-20-21, 04:44 PM
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Originally Posted by Patrick398 View Post
haha sorry I should have thought that may not have travelled well. I’ll stick to Albion from now on 😉

Thanks so much for all those suggestions! So they’ll all fit the current frame without any issues? I was reading something about simplex dropouts not being compatible with many derailleurs. The way this fix up has gone so far I’m just assuming everything single component on this bike has some idiosyncrasy that’s makes it a pain in the hole.

I’m not ever sure if this frame has a simplex drop out…
The claw makes the drop-out less important since there is not the interesting nubs on the derailleur hanger to contend with. There might be a piece to hold the wheel axle at a particular position, but other than that, I haven't heard that about the dropouts without hangers.

I would go to the bike monger and see if there might be a stash of old parts and bits, then raid away!
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Old 10-20-21, 04:52 PM
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Ok thank you for that!
I値l go and inspect some derailleurs tomorrow morning. If that fails I値l go for the VX on the electric bike mongers (eBay)
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Old 10-20-21, 04:53 PM
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Originally Posted by jdawginsc View Post

I would go to the bike monger and see if there might be a stash of old parts and bits, then raid away!
I really hope the term bike monger catches on. It makes me chuckle every time I read it 😂
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Old 10-20-21, 04:54 PM
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Any of the Suntour Vx series are/were the go to upgrade from Simplex. In the early 70s I went to a first gen Shimano Crane which worked very well, but today the Suntour line should be available almost everywhere and at very reasonable pricing. And if you like shiny buy some polish at the same time!




Also, these later Simplex also work remarkably well... I bought this one new a few years back from Velo Orange and it was cheap! It works great but I did go back to Suntour anyway.

Last edited by markk900; 10-20-21 at 04:58 PM.
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Old 10-20-21, 05:51 PM
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The pre-index SunTour derailleurs shift very well but they don't have the upper pivot B-spring of most index era derailleurs, which allows the jockey pulley to follow a more optimal path and provides better shifting performance.
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Old 10-21-21, 03:14 AM
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Originally Posted by T-Mar View Post
The pre-index SunTour derailleurs shift very well but they don't have the upper pivot B-spring of most index era derailleurs, which allows the jockey pulley to follow a more optimal path and provides better shifting performance.
Off topic, what sort of brakes did it use where there is a vertical hole for attaching the rear brake?
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Old 10-21-21, 03:32 AM
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Originally Posted by jdawginsc View Post
Off topic, what sort of brakes did it use where there is a vertical hole for attaching the rear brake?
MAFAC;
used a special bit that bolted through the hole and the brake bolted to the side of the bit.
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Old 10-21-21, 03:49 AM
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Took the old simplex off, with great difficulty I should add. Should I keep hold of the black claw the simplex was attached to or mount the new derailleur directly to the dropout?



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Old 10-21-21, 04:06 AM
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Originally Posted by oneclick View Post
MAFAC;
used a special bit that bolted through the hole and the brake bolted to the side of the bit.
So a proprietary deal that needed a different brake bridge placement, a specialized attachment of a hard to source part, and decreasing brake rigidity for slightly better fender mounts?

Did the Swiss make these or something?
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Old 10-21-21, 05:27 AM
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If you want to keep the bike all French, The Simplex SX610 GT rear derailleur is a good option.
It has an offset top pivot design that helps it shift much better than earlier straight parallelogram derailleurs.
The 610 was used with great success by Peugeot on many of their mix level sport bikes in the 80's. Easy to find and not too expensive to buy, used or even close to NOS. The ones on Peugeots even had Peugeot brand plates on them, making them a nice match to their framesets.
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Old 10-21-21, 06:44 AM
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Originally Posted by Patrick398 View Post
Took the old simplex off, with great difficulty I should add. Should I keep hold of the black claw the simplex was attached to or mount the new derailleur directly to the dropout?


Get a replacement derailleur that has a claw mount attached. Here in the US, there are often co-ops that sell used parts at very low prices. I am a huge fan of the Suntour Vx line, but they have gone up in price. You have a Simplex claw which works on Simplex RDs. Don't bother.

Nicer Simplex derailleurs tend to be expensive, and IMO are inferior to the Japan made parts. You could be a modern Shimano derailleur on there, functionally it would be fine but to me would look pretty odd. The lower end Shimano and older Suntour stuff worked fine, often the higher end stuff was lighter and had a nicer finish.

Example of one of the new Shimano RDs with a claw, $13 US from Amazon. Ugly to me.


https://www.amazon.com/Shimano-Tourn...3%2CB07FZBX7WJ


Last edited by wrk101; 10-21-21 at 06:51 AM.
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Old 10-21-21, 06:46 AM
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Originally Posted by Patrick398 View Post
Took the old simplex off, with great difficulty I should add. Should I keep hold of the black claw the simplex was attached to or mount the new derailleur directly to the dropout?


Those Simplex Prestige derailleurs aren't intended to be separated from their hangers; that's why it was so difficult. The Prestige hanger won't work with anything other than another Prestige derailleur. If you're replacing it with some other brand, they should come with their own hanger. SunTour's hangers are pretty common and work with pretty much any derailleur designed to mount on a Campagnolo-type dropout. Huret's hangers are proprietary, so if you want to use a Huret derailleur, make sure it comes with the hanger.
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