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View Poll Results: What Rear Derailleur For The Trek 720?
Suntour LeTech
12.20%
Shimano M735 Deore XT
31.71%
Suntour XC Pro
31.71%
Sachs/Huret DuoPar
24.39%
Multiple Choice Poll. Voters: 41. You may not vote on this poll

I Just Can't Leave Well Enough Alone

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Old 03-23-15 | 01:27 PM
  #26  
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Originally Posted by seedsbelize
None of the above. Suntour VGT Luxe
Originally Posted by mstateglfr
Didn't these come with a total capacity of 28t and max cog of 30t?

Pretty limiting, from what ive read. Love the look though. I have one, haven't used it though.
Don't believe everything you read.

I was running a VGT LUX with a 52/47/36 coupled to a 14-32 freewheel no issues.
also with a 48/42/28 coupled to a 14-34 freewheel Kind of a stretch but it worked.

I think I might have liked it better than my Cyclone.
Maybe just cause it's beefier.
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Old 03-23-15 | 01:45 PM
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Yeah I was misremembering- I was thinking of the VT Luxe I have.
Even still, your numbers are a pleasant surprise since the VGT shows 36t max capacity on disraeligears. I may try it out on my next total rebuild, whenever that may be.
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Old 03-23-15 | 04:04 PM
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Bikes: 79 Trek 930, 80 Trek 414, 84 Schwinn Letour Luxe (coupled), 92 Schwinn Paramount PDG 5

The beauty of the VGT Luxe, and some of the others is the open cage design. I love the open cage; would have them on all my friction bikes.
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Old 03-24-15 | 05:42 AM
  #29  
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Bikes: 1978 Trek TX700; 1978/79 Trek 736; 1984 Specialized Stumpjumper Sport; 1984 Schwinn Voyageur SP; 1985 Trek 620; 1985 Trek 720; 1986 Trek 400 Elance; 1987 Schwinn High Sierra; 1990 Miyata 1000LT

Originally Posted by fietsbob
My Favorite Touring Bike RD is The Campag MTB Euclid. I scored a few on close-out in the 80's
Talk about "unobtainium."

Every once in a while some Euclid parts (brake levers/shifters/brakes) pop up on the local CL. As gloriously cool as they look, the brakes need U-brake/roller cam bosses on the frame and the shifters need to be mounted to the brake levers which are terrifyingly overbuilt. I'd love to see a pic of the Euclid levers next to something like the BL-733. Plus, I don't know if the shifters need to be mated to a Euclid derailleur- like $400 if you can find one.
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Old 03-24-15 | 05:49 AM
  #30  
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Bikes: 1978 Trek TX700; 1978/79 Trek 736; 1984 Specialized Stumpjumper Sport; 1984 Schwinn Voyageur SP; 1985 Trek 620; 1985 Trek 720; 1986 Trek 400 Elance; 1987 Schwinn High Sierra; 1990 Miyata 1000LT

Originally Posted by Steve Whitlatch
You could just get them all set up for the bike and play pick a RD every time you take her out?
You may notice that the derailleur cable is frayed. I think this is my 3rd derailleur cable since getting the bike last year. I think I've had every long and middle cage derailleur that I own on this bike. Maybe several times.

Apparently, tightening and removing the cable from pinch bolts over and over again tends to cause them to fray...


Originally Posted by seedsbelize
The beauty of the VGT Luxe, and some of the others is the open cage design. I love the open cage; would have them on all my friction bikes.
I don't know if you noticed, but one of the features of the LeTech is the "sort of quick cage" design. You just loosen the nut (don't take it off) and the front of the cage swings out of the way. I've heard of people having issues with the quick cage- something happens to cause the chain to jump- and then it falls out of the cage- because there's nothing to hold it in. (IIRC [MENTION=190941]jimmuller[/MENTION] had that happen to him) But that is the beauty of that cage design- on the VGT-Luxe and the Cyclone GT along with others. As long as you have cage tension, the chain is held in place.
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Last edited by The Golden Boy; 03-24-15 at 06:00 AM.
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Old 03-24-15 | 05:53 AM
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Has the Shimano "Deerhead" RD-M700 been mentioned? It works very well in a friction system, and that logo is cool, imo.

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Old 03-24-15 | 06:19 AM
  #32  
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That Le Tech is just so awesome. The future is digital!
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Old 03-24-15 | 06:44 AM
  #33  
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A few quick thoughts here. I second the VTG-Luxe. It is slightly heavier than and not as pretty as a Cyclone but it is nearly bulletproof, a useful property when you're touring 135,298 miles from the nearest bike shop, or even just 10 miles. Yes I did have a chain jump out of a quick-cage once. It was on a Vx-S (the intermediate cage, the GT version is longer still) when the chain shifted off the inside of the small ring. I have no idea what sort of bouncing around allowed it to jump out of the cage too. (The chain got stuck under the rear tire and I skidded to a stop, wearing a flat spot into the chain's side plates. I popped the chain back on and continued riding, then replaced the chain when I got home.) However this episode has not stopped me from using them. They are just too danged convenient.

One thing to check is the inner plate of the cage. IIRC, on both the VGT-Luxe and Vx (or is it the Cyclone-GT?) it protrudes upward above the pulley and possibly hits the adjacent larger cog. I recall seeing that problem once and adjusting the position screw (the B-screw?) to eliminate that interference. A big plate aids in shifting up but could limit the cog size unless the hanger is longish.

FWIW, the Vx appears functionally equivalent to the VGT-Luxe but perhaps not as pretty. The Cyclone (1st-gen at least and I don't recall the MkII) has a nifty feature where the cable housing fits into a moving part of the parallelogram. This allows the angle of the housing to rotate with the parallelogram so that the cable always emerges from the cable at zero angle.

I can't decide whether that deer head logo is supposed to be the front of a motorcycle or Batman with his wings extended.

Edit: I check various RDs. The protruding plate I recall is the outer plate, not the inner. I had trouble on one installation with it hitting the second largest cog on a big-cog FW.
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Old 03-24-15 | 09:22 AM
  #34  
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Put the Huret back on it.
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Old 03-24-15 | 10:08 AM
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Bikes: 09 Motobecane Fantom CX, Trek YSL-CC, 05-Giant STP2, 73 Schwinn World Voyageur, 73 Raleigh Super Course, 73 Raleigh Sports(his and hers), 1984 Trek 520

It would be difficult for me to pass up that Le Tech for no reason other than that font! I may even take mediocre shifting with that wicked looking piece of gear.
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Old 03-24-15 | 11:54 AM
  #36  
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Go DuoPar it looks cleaner "et le courant"!


I'd also consider putting the DuoPar Titanium back on. It's a really nifty looking unit- it's the poster child for ultra smooth shifting - it shifted so smoothly, I seriously wouldn't know that the shift went through until I felt the resistance on the pedals.








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Old 03-24-15 | 04:41 PM
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Agree with that yapanese deer head logo. I had the thinking deore meant deer but just looked it up and it means 'beast' or 'wild animal'. In modern English could also mean beloved, costly, precious.


Originally Posted by nlerner
Has the Shimano "Deerhead" RD-M700 been mentioned? It works very well in a friction system, and that logo is cool, imo.

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Old 03-31-15 | 02:53 PM
  #38  
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Originally Posted by nlerner
Has the Shimano "Deerhead" RD-M700 been mentioned? It works very well in a friction system, and that logo is cool, imo.



Is the M700 RD a slant parallelogram?

I've read more than a few posts about poor shifting, and it did come out before Suntour's patent expired. I know there were different versions of this unit- but I thought that was all about the upper pulley...
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