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  1. #1
    Stop reading my posts! unworthy1's Avatar
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    Mixed Marriage: Campy and Shimano= happiness?

    Here's my question for the Wonks:
    Wait, first the set-up...working on a friend-of-friends Bianchi with Campy 8 speed Ergo brifters, Campy cogs on a Campy rear wheel, but a broken (badly) Campy RD.
    My thought was to replace that RD with a similar Campy 8-spd RD and be done, but these aren't so easy to find. I was offered an older Campy RD and started to research whether it would work with Ergo controls (not clear), which lead me to Sheldon Brown...
    and he lead me to this site:
    http://www.ctc.org.uk/DesktopDefault.aspx?TabID=3946
    From what I can tell: the spacing between Shimano 7-spd cogs and Campy 8-spd cogs is the same (5mm).
    So my theory is that a Shimano 7-spd RD will move the chain the same distance as a Campy 8-spd when asked nicely by the Campy Ergo 8-spd control.

    NOW the question: will it work??
    If it does then I can solve this with a cheap(er) Shimmy RD and move on

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    no.

    the cog spacing is the same but the cable pull ratio is different. a campy 8spd rd and 8spd ergo lever will shift a 7spd shimano freewheel though.

  3. #3
    Stop reading my posts! unworthy1's Avatar
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    OK. Thanks for that answer. How about throwing in one of the Jtek Shiftmates to change the cable pull ratio?
    http://jtekengineering.com/shiftmate.htm
    Anybody been there done that?
    If so, which model?
    Or is this just a marriage that will never be?

  4. #4
    Senior Member boatsinbottles's Avatar
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    I'm not very ed-u-ma-kated in these here matters, but doesn't the indexing all live in the shifter? Shouldn't the RD just go along for the ride?

  5. #5
    Stop reading my posts! unworthy1's Avatar
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    ^That's what I used to think (and even said as much in this forum), but there's another variable: the "lever" of the RD in question...or more like the distance from the cable adjuster to the bolt on the RD arm. This varies and affects the distance the RD moves relative to how much cable was pulled by the shifter.

  6. #6
    www.theheadbadge.com cudak888's Avatar
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    Quote Originally Posted by boatsinbottles View Post
    I'm not very ed-u-ma-kated in these here matters, but doesn't the indexing all live in the shifter? Shouldn't the RD just go along for the ride?
    No. RD's are designed with specific movement vs. their cable ratio.

    -Kurt

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    Quote Originally Posted by unworthy1 View Post
    OK. Thanks for that answer. How about throwing in one of the Jtek Shiftmates to change the cable pull ratio?
    http://jtekengineering.com/shiftmate.htm
    Anybody been there done that?
    If so, which model?
    Or is this just a marriage that will never be?
    i dont see one that looks to do what you are trying. besides, by the time you buy a shimano RD and a shiftmate you will be at the cost of a campy RD

    Quote Originally Posted by boatsinbottles View Post
    I'm not very ed-u-ma-kated in these here matters, but doesn't the indexing all live in the shifter? Shouldn't the RD just go along for the ride?
    not really. here is my best attempt to explain. the indexed lever pulls a prescribed amount of cable and then the RD transfers that cable pull into lateral movement across the cassette. different able anchoring locations and pivot points on rear derailleurs will effect how far the RD moves per millimeter of cable pull.

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    cudak888 beat me to the post.

    anyway, i hope the helps explain things.

  9. #9
    Seņor Member 4Rings6Stars's Avatar
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    I have an 8s Campagnolo Avanti RD I might be convinced to trade. It's no lightweight but should work fine. PM me if interested.
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  10. #10
    Stop reading my posts! unworthy1's Avatar
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    Actually it's just that I can't find an exact match for this Campy RD (long cage Mirage from approx. '96) at any price at this time. One of the folks here has a short cage from about '91 (my guess) but not sure about the compatibility and it's missing a part.
    Guess I'll have to lurk on eBay until one crops up...
    Thanks for the help!

    EDIT: PM sent re the Avanti RD^
    Last edited by unworthy1; 01-10-12 at 11:26 PM.

  11. #11
    Senior Member boatsinbottles's Avatar
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    Quote Originally Posted by thirdgenbird View Post
    not really. here is my best attempt to explain. the indexed lever pulls a prescribed amount of cable and then the RD transfers that cable pull into lateral movement across the cassette. different able anchoring locations and pivot points on rear derailleurs will effect how far the RD moves per millimeter of cable pull.
    Cheers! That helps quite a bit. I might just be parting with the 8 speed Campy Ergos that I've had sitting waiting for a project!

    Nice friction shifters (Suntour Barcons) have me spoiled!

  12. #12
    AKA: Rusty Bitts pamaguahiker's Avatar
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    Quote Originally Posted by unworthy1 View Post
    Actually it's just that I can't find an exact match for this Campy RD (long cage Mirage from approx. '96) at any price at this time. One of the folks here has a short cage from about '91 (my guess) but not sure about the compatibility and it's missing a part.
    Guess I'll have to lurk on eBay until one crops up...
    Thanks for the help!

    EDIT: PM sent re the Avanti RD^
    From my lurks on ebay regarding 8 speed various componentry, they have all been hideously overpriced. And as Boatsinbottles states. The bar end shifters i have, indeed have me spoiled on several other bicycles and i have recently taken to using them more frequently for the simplicity and price points.

  13. #13
    "Purgatory Central" Wino Ryder's Avatar
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    Quote Originally Posted by unworthy1 View Post
    Anybody been there done that?
    If so, which model?
    Or is this just a marriage that will never be?

    Derailleurs dont care what shifters you use. The indexing is between the shifters and the rear cogs. For months I ran campy 8-speed indexed DT shifters through a Shimano 600 tri-color rr derailleur with a campy 8-speed Record cassette. It shifted just as fine as my chorus 8-speed derailleur I eventually got. The shifters dictate the amount of cable pull, not the derailleur. As long as the shifters match the cassette you can use almost any derailleur that has a barrel adjuster to fine tune the indexing.
    ~ "I like the way the brake cables come out of the top of the levers and loop around to the brake calipers!...I like those downtube shifters too!...No no no, don't take 'em off, don't take 'em off,...leave 'em on, leave 'em on! - Thats right baby!!

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  14. #14
    Senior Member RobbieTunes's Avatar
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    Quote Originally Posted by Wino Ryder View Post
    Derailleurs dont care what shifters you use. The indexing is between the shifters and the rear cogs. For months I ran campy 8-speed indexed DT shifters through a Shimano 600 tri-color rr derailleur with a campy 8-speed Record cassette. It shifted just as fine as my chorus 8-speed derailleur I eventually got. The shifters dictate the amount of cable pull, not the derailleur. As long as the shifters match the cassette you can use almost any derailleur that has a barrel adjuster to fine tune the indexing.
    I tend to disagree. Anyone who's tried to navigate Syncro with it's different inserts would find that you also have to match the RD.
    Also, my 8-sp DT shifters (Shimano) do not work with my 9-sp 105 RD (Shimano) The first two and last two cogs are fine, the rest do not match up. I've also tried a pre-Ergo RD with 8-sp Ergos, and it did not work.

    SRAM, with it's newer 1:1 ratio, addresses this directly.

    That being said, I ran an 8-sp Campy rear wheel with 600 STI's for a year or so, with no problem, but the shifters and RD were matched.

    If all RD's moved the same amount of lateral distance for equal cable pull distance, they'd all play nice. I sure wish they would, but they don't.
    Last edited by RobbieTunes; 01-11-12 at 03:52 AM.

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  15. #15
    www.theheadbadge.com cudak888's Avatar
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    Quote Originally Posted by Wino Ryder View Post
    Derailleurs dont care what shifters you use. The indexing is between the shifters and the rear cogs. For months I ran campy 8-speed indexed DT shifters through a Shimano 600 tri-color rr derailleur with a campy 8-speed Record cassette. It shifted just as fine as my chorus 8-speed derailleur I eventually got. The shifters dictate the amount of cable pull, not the derailleur. As long as the shifters match the cassette you can use almost any derailleur that has a barrel adjuster to fine tune the indexing.
    You were able to do that, because your Syncro downtube levers probably had a detent ring installed that was curiously similar to the Shimano 600 RD. What's more, you've overlooked the importance of freewheel/cassette cog spacing.

    Once again:

    A. The shifters dictate the amount of cable pull.
    B. The pivot points of the RD determine how much the RD will travel for a given amount of cable pull.
    C. The spacing of the cogs on the freewheel or cassette must match the travel of the RD through each shift.

    -Kurt

  16. #16
    Stop reading my posts! unworthy1's Avatar
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    Well, studying the chart and text on that UK site, I'm beginning to see that it's not always black-and-white (except in theory). He points out that there are factors like slop and the designed-in pulley float of the Shimano derailleurs that allow "good enough" match so that the travel/spacing relationship can be mismatched as much as 0.6mm and still be considered a good combo (by him). He also says the "good match" can degrade with wear until that amount of inaccuracy will not be tolerable, too. I'm curious if anybody has experimented with more alterations to the mounting point on Shimano RDs (more that just the rotate tab and re-clamp cable deal he calls the Hubbub): if that changes the ratio from 1:7 to 1:6 maybe something can be devised that goes to 1:5 and1:4 (Campy RD old and new ratios).
    Just thinking...

  17. #17
    Senior Member RobbieTunes's Avatar
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    Quote Originally Posted by unworthy1 View Post
    Just thinking...
    That gets me in trouble every time.

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  18. #18
    Wookie Jesus inspires me. Puget Pounder's Avatar
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    Quote Originally Posted by unworthy1 View Post
    Well, studying the chart and text on that UK site, I'm beginning to see that it's not always black-and-white (except in theory). He points out that there are factors like slop and the designed-in pulley float of the Shimano derailleurs that allow "good enough" match so that the travel/spacing relationship can be mismatched as much as 0.6mm and still be considered a good combo (by him). He also says the "good match" can degrade with wear until that amount of inaccuracy will not be tolerable, too. I'm curious if anybody has experimented with more alterations to the mounting point on Shimano RDs (more that just the rotate tab and re-clamp cable deal he calls the Hubbub): if that changes the ratio from 1:7 to 1:6 maybe something can be devised that goes to 1:5 and1:4 (Campy RD old and new ratios).
    Just thinking...
    I've done this in several setups and it tends to work fine. Some better than others. I'll have to go through my "portfolio of setups" to let you know what I used, but I can if you want to know more.

  19. #19
    Senior Member Alan Edwards's Avatar
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    Quote Originally Posted by unworthy1 View Post
    Well, studying the chart and text on that UK site, I'm beginning to see that it's not always black-and-white (except in theory). He points out that there are factors like slop and the designed-in pulley float of the Shimano derailleurs that allow "good enough" match so that the travel/spacing relationship can be mismatched as much as 0.6mm and still be considered a good combo (by him). He also says the "good match" can degrade with wear until that amount of inaccuracy will not be tolerable, too. I'm curious if anybody has experimented with more alterations to the mounting point on Shimano RDs (more that just the rotate tab and re-clamp cable deal he calls the Hubbub): if that changes the ratio from 1:7 to 1:6 maybe something can be devised that goes to 1:5 and1:4 (Campy RD old and new ratios).
    Just thinking...
    I'm going to say that you are talking about different cable mounting point and methods. "A" mounting point Vs "B" mounting point. Sheldon has a little info on this but you are out in untesting ground and cross company campatability. Good luck, and if you get something to work please let us know as it will save the next guy a lot of trouble.
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  20. #20
    Senior Member ColonelJLloyd's Avatar
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    Related Question

    First, I can confirm that 8sp Ergopower shifters work very well with an 8sp compatible Campagnolo RD and a 7sp HG freewheel. I've been using this setup.



    I have another bike with a complete Shimano 64xx group, but I don't want to use the STI and will go with a 9sp cassette (I have purchased one with the cogs I want). I could use indexing bar ends, DT shifters, Retroshifts or Shimano 9sp STI units. But, I don't want to. I would like to use Ergopower shifters. So, here is what I would like to use:

    Shifters: 2011 Campagnolo Veloce Power Shift (EP 11 VLXSC)
    RD: RD-6401 with JTEK ShiftMate #2
    FD: FD-6401
    Cassette: Shimano 9sp on FH-6402

    Does anyone forsee shifting issues with either the front or rear derailleur with this particular setup?
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    I will point out something else that recently came to my attention, after fixing a shift indexing issue on some Campy 10speed bar-ends. Specifically, the indents on the indexing ring are NOT uniformly spaced, which indicates that cable pull varies across the range. This actually makes quite a bit of sense from a math standpoint, but I always thought Shimano figured out a way to do it with uniform pulls?

  22. #22
    Wookie Jesus inspires me. Puget Pounder's Avatar
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    Quote Originally Posted by ColonelJLloyd View Post
    First, I can confirm that 8sp Ergopower shifters work very well with an 8sp compatible Campagnolo RD and a 7sp HG freewheel. I've been using this setup.



    I have another bike with a complete Shimano 64xx group, but I don't want to use the STI and will go with a 9sp cassette (I have purchased one with the cogs I want). I could use indexing bar ends, DT shifters, Retroshifts or Shimano 9sp STI units. But, I don't want to. I would like to use Ergopower shifters. So, here is what I would like to use:

    Shifters: 2011 Campagnolo Veloce Power Shift (EP 11 VLXSC)
    RD: RD-6401 with JTEK ShiftMate #2
    FD: FD-6401
    Cassette: Shimano 9sp on FH-6402

    Does anyone forsee shifting issues with either the front or rear derailleur with this particular setup?
    Someone correct me if I'm wrong, but I think you will have problems with the front since this is the power shift version, which got rid of the smaller detents/trimming. Your cable pull for the front will be off.

    As for your rear, you can do the alternative routing before the shiftmate and see if that works to your liking.

  23. #23
    Is a real super guy. Henry III's Avatar
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    8spd Ergo brifters will shift a complete Shimano drive train including cassette. 10 spd Veloce or Mirage brifters will also shift 8spd Shimano I believe but that's it between the two companies. The derailleurs I would stick with Shimano. Just the brifters is all you need. It's been covered quite a few times or you can buy the adapters for fairly cheap also that change the cable pull.

  24. #24
    Wookie Jesus inspires me. Puget Pounder's Avatar
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    There are plenty more options than this.

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    Quote Originally Posted by Henry III View Post
    8spd Ergo brifters will shift a complete Shimano drive train including cassette. 10 spd Veloce or Mirage brifters will also shift 8spd Shimano I believe but that's it between the two companies. The derailleurs I would stick with Shimano. Just the brifters is all you need. It's been covered quite a few times or you can buy the adapters for fairly cheap also that change the cable pull.
    But 8spd and 10spd campy levers have completely different cable pull.

    8spd pulls about 3.5mm

    10spd pulls about 2.8mm

    there is absolutely no way that both of these shifters will operate well on the same drivetrain.

    that said, the campy 10spd cable pull is very very close to that of shimano 8spd so the campy 10 levers will operate an 8spd shimano drivetrain.
    Last edited by thirdgenbird; 01-11-12 at 05:31 PM.

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