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Posted: Sat Nov 07, 2009 6:53 pm |
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Murray30 |
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Joined: 09 Mar 2009 |
Posts: 11 |
Location: Canberra, Australia |
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Hi
Hopefully this is a relatively simple question - is there any way to determining the model name or number of a Simplex Derailleur? - or does it really matter, when all I want to do is replace the damaged jockey wheels?
Thanks in advance
Wayne |
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| | | | | | | | | ID Simplex RD | | | | | |
Posted: Sat Nov 07, 2009 7:27 pm |
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verktyg |
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Joined: 14 Jan 2007 |
Posts: 2814 |
Location: SF Bay Area |
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Welcome to the Forum, now post some pictures....
To answer your question, yes, no, maybe.
Without a picture it's very hard to tell what model derailleur you have.
Chas. resident retrogrouch |
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Posted: Fri Nov 13, 2009 10:33 pm |
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Murray30 |
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Joined: 09 Mar 2009 |
Posts: 11 |
Location: Canberra, Australia |
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Hi
Sorry for the delay in posting photos of the Simplex.
The Simplex belongs to my Gitane, which has previously identified in this forum as a Hosteller (photos posted in March this year).
As you can see in the attached photos, the jockey wheels have suffered a bit over the years. I am trying to replace these jockey wheels and was wondering if they are peculiar in size etc for a simplex etc
Thanks in advance
Wayne
[/img] |
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| | | | | | | | | Simplex Prestige | | | | | |
Posted: Sat Nov 14, 2009 12:19 am |
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verktyg |
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Joined: 14 Jan 2007 |
Posts: 2814 |
Location: SF Bay Area |
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That's a Simplex Prestige derailleur.
WOW! Those pulleys are worn! New chain and freewheel time too...
I don't want to use the word popular because these derailleurs got a bad rap due to the Delrin plastic construction... I'd estimate at least half of the entry level European bikes imported into the US during the 1970-74 Bike Boom came with these.
I haven't tried this for a while but I suspect that any older Suntour or Shimano pulleys would work just fine. I think that the pulley screws are 6mm which should be the same for those Japanese brands too.
Remove the pulleys and measure the width across the metal dust shields. If the Japanese pulleys are a little too narrow, use a washer or two as spacers.
The newer pulleys for 7-8-9-10 speed derailleurs may be too narrow to work well that's why I suggested old style pulleys.
I'll have to go down to the bat cave tomorrow and check it out.
Chas. |
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| | | | | | | | | Re: Simplex Prestige | | | | | |
Posted: Sat Nov 14, 2009 7:19 am |
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scozim |
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Joined: 26 Sep 2008 |
Posts: 629 |
Location: Ellensburg, WA |
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verktyg wrote: |
That's a Simplex Prestige derailleur.
I haven't tried this for a while but I suspect that any older Suntour or Shimano pulleys would work just fine. I think that the pulley screws are 6mm which should be the same for those Japanese brands too.
Remove the pulleys and measure the width across the metal dust shields. If the Japanese pulleys are a little too narrow, use a washer or two as spacers.
Chas. |
I did this with the Simplex SX630 (I think) on my Sprint. Mine had two broken teeth on the upper pulley. The local bike shop let me have an old Shimano Tourney derailleur after we determined it was the same size as the Simplex. I then put that pulley in the bottom position and moved the other Simplex pulley to the upper. I've got approximately 1400 miles (2250 km) on the bike this year with no problems at all. |
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| | | | | | | | | Bullseye pulleys | | | | | |
Posted: Sat Nov 14, 2009 1:32 pm |
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greyhundguy |
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Joined: 09 Apr 2008 |
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Location: South-Central VIRGINIA |
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_________________ Dance like nobody is watching. |
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| | | | | | | | | Re: Bullseye pulleys | | | | | |
Posted: Sat Nov 14, 2009 1:39 pm |
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verktyg |
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Joined: 14 Jan 2007 |
Posts: 2814 |
Location: SF Bay Area |
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greyhundguy wrote: |
The Bullseye Pulleys work great too. They have sealed bearings. |
Silk stockings on a rooster!
Chas. |
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Posted: Sun Nov 15, 2009 5:35 am |
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greyhundguy |
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Joined: 09 Apr 2008 |
Posts: 678 |
Location: South-Central VIRGINIA |
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Wayne,
Chas. likes to joke around. Here is a quote from him from another thread on this List:
>[[[ "I've used these Bullseye Pulleys since the 70s. Not because of the claimed minuscule reduction in friction but because they were quieter and smoother than most plastic pulley wheels." ]]]<
The only downside I note on the Bullseye pulleys is that the anodized finish eventually starts to wear off on the teeth showing the Alloy underneath.
Jay |
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_________________ Dance like nobody is watching. |
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| | | | | | | | | Chain Width & Bullseye Pulleys | | | | | |
Posted: Sun Nov 15, 2009 10:54 am |
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verktyg |
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Joined: 14 Jan 2007 |
Posts: 2814 |
Location: SF Bay Area |
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...Also, don't try to use these pulleys with the newer narrower with chains. They were made for the original 5 speed 3/32" wide chains.
Many of the chains made today will work with 5, 6, 7, or 8-speed freewheels or cassettes. Plastic pulleys will wear to fit the narrower internal chain width but aluminum doesn't.
Chas. |
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| | | | | | | | | Simplex "model" | | | | | |
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