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  1. #1
    Senior Member avtandil's Avatar
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    guys plz plz plz plz help

    hello everyone. first of all sorry for bad English i have race bicycle and planing to travel though Europe.. planning to visit 6-7 countries. so i am planing for long distance ride. i have build my custom bicycle. i bought old ideal (don't remember model). but i have found a problem my rear derailleur is not working properly. i am planning to change front and rear derailleur front- 2 shift and rear 9-shift. i really don't know which one to buy.

  2. #2
    Senior Member avtandil's Avatar
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    can anyone answer me plz.......

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    Member Raylon's Avatar
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    I personally have no idea, but you are going have to give way more details about what kind of bike, what you have, what you want, etc. No one will be able to answer with the limited info you have given.
    2012 Dawes Lightning Cross
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  4. #4
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    Quote Originally Posted by avtandil View Post
    can anyone answer me plz.......
    It would help if we knew where you live. In any case, you have many choices but if you have index shifting, which I assume you do with 9 speeds, then it's important that you stay with the same brand as your shift levers. So check the levers and shop for 9 speed derailleurs within that brand, according to your budget.
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  5. #5
    Senior Member avtandil's Avatar
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    thank you for your reply raylon i really appreciate it. could u plz ask me questions what info u would like to know and i will answer to u. i have bought old ideal bicycle and then painted and restored it...... its a race bicycle and has short rear Derailleu. it has 9 speed Cassette and 2 speed cranckset

  6. #6
    Senior Member avtandil's Avatar
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    Quote Originally Posted by FBinNY View Post
    It would help if we knew where you live. In any case, you have many choices but if you have index shifting, which I assume you do with 9 speeds, then it's important that you stay with the same brand as your shift levers. So check the levers and shop for 9 speed derailleurs within that brand, according to your budget.
    problem is that in my country bicycle is not common thing.....in streets u barely will see ppl riding bicycles. relatively shops are not as advanced as i wished so my only shop is amazon. regarding choosing a brand for me is difficult because as i told i painted bicycle and don't remember the exact model of derailleure. i know that sounds wierd but thats the siatuation i am in i really need some advices for what i am gratefully thankful

  7. #7
    Senior Member avtandil's Avatar
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    my main concern is which derailleur should i buy long or short? i have founs some for 20-30 $ and some much more expansive my budget for both set (front and rear is 100-150$)

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    Again, the most important thing to consider is the brand, Shimano, Campagnolo, Sram, or other of the shift levers. That will determine which brand derailleurs you need. See if the levers have the brand written on them anywhere, and that's your starting place.
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  9. #9
    Senior Member avtandil's Avatar
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    thats definitely shimano

  10. #10
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    OK, so we have a starting place. Next step is to look at the rear derailleur, and see if the frame has a built on hanger (extension the derailleur screws on to) or if the derailleur has to include the adapter. This is unlikely on a 9s bike, but you need to check.

    Then you need to know if the front derailleur mounts to an adapter plate (braze-on) attached to the frame, or if the front derailleur has a band that wraps around the frame. All braze-on type are the same, but for a band mounted model you need to know the diameter of the frame.

    For long vs short cage, it depends on the gear range. The derailleur has a capacity expressed two ways.

    1- the largest rear sprocket it can work with
    2- chain take up capacity which is the issue in cage length. The capacity must be larger than the sum of the differences in sprockets, ie. for a 12-28 with 39-53 chainrings it would be 16+14 or 30 teeth capacity.

    So you have the FD type, and maybe band diameter, and a way to know which size cage you need, now it's about price for a pair of decent Shimano front derailleurs.
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    An ounce of diagnosis is worth a pound of cure.

    “Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

    “One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

    WARNING, I'm from New York. Thin skinned people should maintain safe distance.

  11. #11
    Senior Member avtandil's Avatar
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    Quote Originally Posted by FBinNY View Post
    Again, the most important thing to consider is the brand, Shimano, Campagnolo, Sram, or other of the shift levers. That will determine which brand derailleurs you need. See if the levers have the brand written on them anywhere, and that's your starting place.
    so levelers and derailleur should be same brand i guess

  12. #12
    Constant tinkerer FastJake's Avatar
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    We need way more information. Easiest thing would probably be to post detailed pictures of your components. Then we'll have a better idea what you're working with.
    Why "derailer" is the correct way to spell the gear-change mechanism: sheldonbrown.com/derailer.html

  13. #13
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    Quote Originally Posted by avtandil View Post
    so levelers and derailleur should be same brand i guess
    Not should,---- must.

    It's possible to mix brands, but complicated and shouldn't be done except by those who know exactly what they're doing.
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    WARNING, I'm from New York. Thin skinned people should maintain safe distance.

  14. #14
    Senior Member avtandil's Avatar
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    Quote Originally Posted by FBinNY View Post
    OK, so we have a starting place. Next step is to look at the rear derailleur, and see if the frame has a built on hanger (extension the derailleur screws on to) or if the derailleur has to include the adapter. This is unlikely on a 9s bike, but you need to check.

    Then you need to know if the front derailleur mounts to an adapter plate (braze-on) attached to the frame, or if the front derailleur has a band that wraps around the frame. All braze-on type are the same, but for a band mounted model you need to know the diameter of the frame.

    For long vs short cage, it depends on the gear range. The derailleur has a capacity expressed two ways.

    1- the largest rear sprocket it can work with
    2- chain take up capacity which is the issue in cage length. The capacity must be larger than the sum of the differences in sprockets, ie. for a 12-28 with 39-53 chainrings it would be 16+14 or 30 teeth capacity.

    So you have the FD type, and maybe band diameter, and a way to know which size cage you need, now it's about price for a pair of decent Shimano front derailleurs.
    OK so for front derailleur frame comes with the plate to attach it, same with derailleur hanger. as i guessed long/short cage depends on length of chain. on my place which models u would choose? and btw can i ask u what bike u have?
    i stronglu belibe u have very strong one

  15. #15
    Senior Member avtandil's Avatar
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    i am really embraced to ask u this but i really could not find how to upload pics here sorry

  16. #16
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    I have a few bikes, the newest of which is about 15 years old. I also own a titanium road frame given to me by the maker a few years ago, nut haven't built it yet because I told myself I'd build it when my current road bike dies.
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    An ounce of diagnosis is worth a pound of cure.

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    “One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

    WARNING, I'm from New York. Thin skinned people should maintain safe distance.

  17. #17
    Senior Member avtandil's Avatar
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    lol man titanium is like Bentley in bike world

  18. #18
    Senior Member avtandil's Avatar
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    upload some pics of urs plz

  19. #19
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    Quote Originally Posted by avtandil View Post
    upload some pics of urs plz
    I don't have any photos of my bikes. Zero, not even one. I have very few of my wife, so if I took pictures of my bikes, she'd get jealous.
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    An ounce of diagnosis is worth a pound of cure.

    “Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

    “One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

    WARNING, I'm from New York. Thin skinned people should maintain safe distance.

  20. #20
    Senior Member avtandil's Avatar
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    ahahahaha thats reason i am not still married

  21. #21
    Senior Member avtandil's Avatar
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    so what u suggest regarding derailleur bro?

  22. #22
    Senior Member avtandil's Avatar
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    guys???????? any advice plz? i know it sounds weird the question i ask, but i am sitting in front of amazon website and confused which derailleur to buy

  23. #23
    Senior Member avtandil's Avatar
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  24. #24
    Senior Member Homebrew01's Avatar
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    You might want to visit the "Touring" forum to get information about long distance riding.
    Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike

  25. #25
    Senior Member Homebrew01's Avatar
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    Quote Originally Posted by avtandil View Post
    can anyone answer me plz.......
    Are you sure you need new derailleurs ? What is the problem ? Maybe you just need adjustments or new cables.
    Or perhaps the hanger is bent, or the problem is related to the chain and/or cassette.

    Here's some information on problem solving:

    http://www.parktool.com/blog/repair-...illeur-systems
    Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike

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