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  1. #1
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    Which top swing front derailleur?

    Including older model years, which version in top swing, top pull is best and why? I will be running a 44-34/32-22 triple w/104x64 BCD.

  2. #2
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    Shimano 960 vs 570?

    With traditional versions, it never seemed worthwhile to even consider XTR because I have never worn out the much less expensive & lighter XT 751. I have no experience with top-swing though. There seem to be quite a few differences between the various top-swing models. Why should I choose one over the other?

  3. #3
    Mantis, Paramount, Campy
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    May I ask Why You Want A Top Swing?

    Does your frame nesessitate one?
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  4. #4
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    Yes, top-swing, top-pull required.

    I don't have the frame (RX100) yet, but, yes, it requires top-swing, top-pull.

  5. #5
    Mantis, Paramount, Campy
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    Oh, That Stinks

    I'd go XTR then if I were you.

    I have used an XT (dont remember the #) and one that was below LX level. I was unhappy with the performance of both units. The lower one I didn't expect much from but the XT was a disappointment and I swapped it out for a bottom swing.
    I found that it had excessive pivot slop out of the box (it came on a new bike I purchased), and also was more sensitive to setup/adjustment.

    I would assume that the XTR is better constructed and would be less prone to developing early pivot slop.
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  6. #6
    Chrome Toaster
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    Well in the days before the 760/960 the 950 XTR was considered a pretty good improvement over the 750. Not that the XT 750 was a bad derailleur at all but the pivots were a bit too small and too close together. This caused them to develop slop relatively quickly which was one of their main complaints. The 950 had beefier and wider spaced pivots as well as a considerably thicker cage less prone to bending or flexing.
    The 960 doesn't change much over the 950 other than its optimized for 44t ring max instead of 46t as the 950 was. I got to check out the new 760 and it's definately a nice improvement over the 750. The new 760 is basically the exact same derrailleur as the new XTR 960. The main difference is the clamping area isn't as refined so it weighs a bit more and the cage is slightly thinner than the 950/960 but thicker than the 750. It gains the main benefit of the XTR which was the better pivot design and stronger cage.
    The main drawback of the 760 is it's about 30g heavier now at 160g but I think that weight includes the shims for 31.8mm and 28.6mm since they now have a one size fits all system. Shimano typically lists their weights with all adapters and hardware included. If you run the larger 34.9mm which requires no shim the weight could be lower.

  7. #7
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    Good info, thanks.

    Do you know anything abou the 952?

    WW shows 760 = ~168 g, 950 = ~109 g, 952 = ~115 g, and 960 = ~130 g. I'm not convinced the weights for the 950 & 952 are accurate or if they are what I am looking for. Do you know any of the actual weights for these set up for 34.9 mm clamp?

  8. #8
    Chrome Toaster
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    Quote Originally Posted by B R H
    Do you know anything abou the 952?

    WW shows 760 = ~168 g, 950 = ~109 g, 952 = ~115 g, and 960 = ~130 g. I'm not convinced the weights for the 950 & 952 are accurate or if they are what I am looking for. Do you know any of the actual weights for these set up for 34.9 mm clamp?
    Actually now that you bring it up I think I got the 950 and 952 mixed up. I was talking about the 952. I believe the 950 might be the 8 speed model.

  9. #9
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    Found the answer.

    Not that it matters at all, especially since I'll be using 8 speed GripShift, but the 952 is 9 speed. The difference is that it uses that hinged differential cage plate. That worries me - more parts to fail, especially in mud.

  10. #10
    I like pie
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    I've got an XT-M750 that's working well. Says Mega 9 on it, but I am using it on 3x8.

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