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Choice between Shimano 105 & Suntour Superbe Pro for front triple

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Choice between Shimano 105 & Suntour Superbe Pro for front triple

Old 12-28-11, 09:20 PM
  #26  
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OK, I did some poking around Velobase, and found a couple of models that look like they'll work well, and harmonize with the bike & its components:

https://velobase.com/ViewComponent.as...=113&AbsPos=15

https://velobase.com/ViewComponent.as...=113&AbsPos=41

https://velobase.com/ViewComponent.as...=113&AbsPos=43

I'm leaning toward the 600EX myself, as it seems to be a little higher end, but I'd be interested in anyone's experiences with any of these derailleurs shifting a triple, or any other comments.
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Old 12-28-11, 10:34 PM
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Ideally, you are looking at a front derailleur optimized for half-step gearing. I know Shimano made Deerhead (early Deore) derailleurs like that. There are probably some Suntour ones as well.
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Old 12-29-11, 04:43 PM
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That's very interesting. I didn't suspect there was such an optimized FD! I checked the Deore FDs on Velobase, they seem a little clunky for a road bike. Anybody know of a specific FD optimized for half-step (plus granny)?
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Old 12-31-11, 07:24 PM
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I went ahead and snagged a 600EX FD-6207 https://www.ebay.com/itm/330662785154...84.m1439.l2648 and an M500 Exage 500CX https://www.ebay.com/itm/160505777565...84.m1423.l2649 off Ebay. I'll get a chance to fit them up and evaluate in the coming weeks, and I'll post back on the results. Both seem to blend aesthetically with the rest of the bike, gruppo-wise.
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Old 01-01-12, 08:56 AM
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The 600 "might" do it, but is very similar to what you already had. Not to say it won't work. I had the same FD on my triple equipped Trek 520. The 500 CX looks like your best bet though. It looks to be designed for a road triple.,,,,BD
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Old 01-01-12, 09:28 PM
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BD your assessment rings true based on the specs & info on Velobase, however I decided to give the 600EX a shot in addition to the 500CX because:
  • I have a 70's Cyclone FD that I pressed into triple service that is working fine
  • I have an early 80's Altus FD that I pressed into triple service that is working fine
  • the 600EX is a little higher end & arguably better looking than the 500CX (and the 105 for that matter)
  • On VB the max tooth difference is given as 18T for the 600EX vs 14T for the 105 and most other double FDs
  • On VB there is a comment that the 600EX will "shift... most triples great..."
  • it's winter time and I'm bored
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Old 06-12-12, 10:32 PM
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Chain skating between the rings is what you get from a chain too narrow for the gap. This is easy to do when mixing brands and series. (and when flipping worn rings!). Or your get it from putting a 9s chain on 7s rings.

Shimano generally keeps their big ring tooth offset constant and adjusts ring spacing by moving the teeth on the middle ring, so 10speed v1 rings have ended up with the teeth outboard of the spider a tad.
Campy did it exactly the other way around, at least up to 10 speed.

Shimano has more than one offset scheme though, I think there was a MTB one that is quite different.

Spacing for the granny is another story. Shimano and Sugino do it quite differently, so mixing their gear may involve spacers or just-not-going-to-work.


Also, running a smooth-sided chain with unpinned rings (which are designed for a chain that has pins protruding) will exacerbate any tendency to skate.
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Old 06-13-12, 04:54 PM
  #33  
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I guess I should have posted a follow up. I ended up not even trying the 500CX, as on arrival, it proved to have a bent clamp, and wouldn't fit around my seat tube. The seller took it back, shipping and all, no hassle, so I'm whole on that one. I installed the 600EX and it's working like a champ. It has reserve shifting range on the top and the bottom, and it shifts great. It looks like I don't have any photos saved anywhere of the final setup. If there's interest I'll snap some and post them up.
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Old 06-13-12, 05:58 PM
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I tried a 600 Arabesque FD and could not get it to reliably shift up to the big chainring on my triple. After an evening of cussing, I gave up. Ultimately I used a 105 triple and it works fine, plenty of reach.
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