I’m starting to understand the beauty of rear derailleurs.
#51
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The triple pulley cage is incredible- it takes up stunning amounts of chain- my pic above just has the Bullseye on the outer pulley for bling- that pulley is rarely in use and a sealed bearing unit would be overkill there- but IIRC it's a 9T pulley to avoid it being engaged and catching on anything as the chain gets tighter. The drawback is that it's 2 big heavy plates. FWIW- the triple pulley initiative was a joint venture with Nishiki- I think those were all branded LePree- all the other ones XC, Cyclone MII, XC Sport came in 85/85 after the 1 year exclusivity for Nishiki. But in that time SIS cleaned house. Shimano invented indexed shifting while Suntour was trying to figure out how to go over rocks.
There were the ultra long cage derailleurs- The LeTech and the 2nd gen Mountech... I would have imagined the Suntour engineers realized that the 15t pulley did a majority of the work without having to have that huge long cage swing around- way too easy to get bent.
There's the triple pivot- Suntour trying to reverse engineer the Duopar and all the bad things that go along with it- and then adding in the exploding captive pulley on the 1st gen Mountech, then there's the LeTech that not only had the triple pivot, but also had a cage that was longer than most people's forearms.
XC was the top level and XC Sport was the level down from there- Suntour knew indexing was either there or around the corner- but the XC Sport got the barrel adjuster- and XC was just straight in. I guess that was to save weight, and they probably didn't have any research into indexing and cable pull and all that...
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Last edited by The Golden Boy; 08-04-22 at 06:26 PM.
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#52
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Derailleurs are pretty much my reason for being. And one I really like is the venerable Huret Allvit. Underrated, because they are associated with the low end bikes they appeared on later in life, they were the thing to have on your expensive hand-made touring machine in the early sixties.
https://www.youtube.com/watch?v=rzn_PggoqcM
https://www.youtube.com/watch?v=rzn_PggoqcM
My vague recollection, from the 1960s when I rode a bike with the Alvit, was that frequent applications of oil kept it running well enough; as opposed to the plastic Simplex derailleurs which seemed to work just as well, at least for 14-year-old me, without the frequent lubrication.
Given the careless nature of many 14-year-old boys My Huret may have only needed frequent lubrication because of deformation caused by negligence.
Brent
Last edited by obrentharris; 08-04-22 at 03:13 PM. Reason: clarity
#53
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#56
Shifting is fun!
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It is. I love how Mr Hirose went about building his bikes.
However, that wasn't the main reason I posted that footage. I think the Allvit is the coolest derailleur to be listening to and especially to be looking at when it shifts.
Mrs non-fixie has one on her Mercier. For her that bike was the start of her love affair with down tube shifters. For me, it's the bike I always like to ride behind, just to see and hear that Allvit do its thing.
However, that wasn't the main reason I posted that footage. I think the Allvit is the coolest derailleur to be listening to and especially to be looking at when it shifts.
Mrs non-fixie has one on her Mercier. For her that bike was the start of her love affair with down tube shifters. For me, it's the bike I always like to ride behind, just to see and hear that Allvit do its thing.
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Also gorgeous but a big disappointment. I toured for three months with one of these. It did the job, but it didn't make shifting as easy as it could have been. Then I installed it on my kid's bike, and it got broken, and apparently it wasn't anyone's fault. There is a weak spot in the knuckle, and it snaps off. I was really disappointed to see such a thing of beauty broken, and the prices on ebay for replacements are, uh, not justified. Ah well.
I really like the writing on the disraeligears site. And the pictures are great; there are many derailleurs that make me say, "That's the prettiest."
I really like the writing on the disraeligears site. And the pictures are great; there are many derailleurs that make me say, "That's the prettiest."
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Tom Reingold, tom@noglider.com
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Blogs: The Experienced Cyclist; noglider's ride blog
“When man invented the bicycle he reached the peak of his attainments.” — Elizabeth West, US author
Please email me rather than PM'ing me. Thanks.
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