4403 derailuir broken on trek sl aplha? What detailuir to replace it?
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  1. #1
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    4403 derailuir broken on trek sl aplha? What detailuir to replace it?

    I have a trek sl aplha and the front derailuir is broken. Part number 4403. The seat tube is. 34.5. The 4403 is non brased.it has a removable collar.Please help . I am good got call Shimano tomorrow but I would like the forums help.

  2. #2
    Rub it............
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    If it has a removable collar, it's a braze on. Just order another derailleur.

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    Quote Originally Posted by JoeDaddio

    I kind of wish it were legal to staple people in the face.

  3. #3
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    fd 4403 isn't avaible.Im calling shimano today and I hope they can help

  4. #4
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    Your LBS should be able to tell you if Shimano has them in stock vs. the parts distributor they use. Because some Shimano stuff has to be ordered directly from Shimano.

    Sent from my SM-G930V using Tapatalk
    You can't fix stupid.

    Quote Originally Posted by JoeDaddio

    I kind of wish it were legal to staple people in the face.

  5. #5
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    Is this the same bike as the last broken front derailleur thread?

  6. #6
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    Do you have a way to post a picture of your broken derailleur? Cause, that would be helpful.

  7. #7
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    I called Shimano and the tech said they do not make a direct replacement for the 4403 derailuir on the stock 52 t crank. I am going to have to upgrade the crank to a 50t and I have options. I am low on cash and the crank is good enufe to commute. I took off the derailuir and set the chain on the middle crank set.when I get some money I will drop it off at the bike shop so they can take it from there.thats it! The 52 t is th problem why they donít make a direct replacement because how the industry has evolved. PeAce thanks for your help.

  8. #8
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    Quote Originally Posted by s10aromeo View Post
    I called Shimano and the tech said they do not make a direct replacement for the 4403 derailuir on the stock 52 t crank. I am going to have to upgrade the crank to a 50t and I have options. I am low on cash and the crank is good enufe to commute. I took off the derailuir and set the chain on the middle crank set.when I get some money I will drop it off at the bike shop so they can take it from there.thats it! The 52 t is th problem why they donít make a direct replacement because how the industry has evolved. PeAce thanks for your help.
    Get a 34.9 braze-on clamp and the Microshift FD-R539 braze on derailleur. That is your least expensive, most reliable option. When you start swapping cranks, bottom bracket, and derailleur, youíre just opening a can of worms. If Iím not mistaken, the cable pull on the new 50t compatible derailleurs is different than the shifter on your bike. If you have your part numbers right now, then trust me, this is the best option. If you want to chat more, PM me, Iíve done this repair twenty times in the last two years.

  9. #9
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    I ordered the fd r539 brazed on. Will that derailuir fit my 4403 collar? I amuse the collar to derailuir is a universal fit. Thanks for your help !!
    Last edited by s10aromeo; 4 Weeks Ago at 04:53 AM.

  10. #10
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    Quote Originally Posted by s10aromeo View Post
    I ordered the fd r539 brazed on. Will that derailuir fit my 4403 collar? I amuse the collar to derailuir is a universal fit. Thanks for your help !!
    It should work just fine.

  11. #11
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    I got the 539 in today and it worked perfect after adjustments .thanks everyone for the quick response

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