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  1. #1
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    How to convert a Mountain Bike to a Fixie

    Dear All,

    I have a 18 speed mountain bike and I want to convert it into a fixie myself but i have many doubts.
    Here a pic of my MTB.
    untitled.JPG

    1) Do I need to change the frame considering that the rear could be too loose after removing all the rear gear cogs?
    2) Do I need to change the whole rear wheel considering that the hub may not be able to convert into a fixie?

    Have anyone done such a conversion before?
    If yes, perhaps you can share your experience with some step by step guides and advices?

    Thank you very much.

    Cheers.
    Shunhui.

  2. #2
    Brown Bear, Sqrl Hunter Jaytron's Avatar
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    PedalRoom

    Hey I just met you,
    and this is crazy,
    but here's my Strava,
    follow me maybe.

  3. #3
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    Quote Originally Posted by shchua View Post
    Have anyone done such a conversion before?


    Cheers.
    Shunhui.
    YES

  4. #4
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    Thanks. I have read through the sites...now is to find the parts and start to disassemble my MTB...

    Will post back here for help when I meet with difficulties.

    My problem is that it seems difficult to find fixie parts.

  5. #5
    Chainstay Brake Mafia
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    I think you're going to need a new rear hub at least. if you have an 18 speed mountain bike the rear hub is probably 130mm but it could be as small as 126mm. If you can't find a fixed mtb wheel (i did a quick search and didnt I would go with a hub meant for 120mm spacing and use a longer axle and lace it to your existing rim.

    actually.. i just did a search and you may be able to convert your wheel to a fixed wheel with a Surly Fixxer if you have a freehub (not a freewheel)

    do your chainrings come off your crank or are they riveted together?
    Last edited by frantik; 01-09-13 at 02:37 AM.
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  6. #6
    Senior Member Bat56's Avatar
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    Quote Originally Posted by shchua View Post
    Thanks. I have read through the sites...now is to find the parts and start to disassemble my MTB...

    Will post back here for help when I meet with difficulties.

    My problem is that it seems difficult to find fixie parts.
    What fixie part are you looking for that you can't find?

  7. #7
    The Stark Fist of Reality Scrodzilla's Avatar
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    Quote Originally Posted by shchua View Post
    My problem is that it seems difficult to find fixie parts.
    Do you live on the moon?

  8. #8
    Senior Member Bat56's Avatar
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    Quote Originally Posted by Scrodzilla View Post
    Do you live on the moon?
    I totally did not think of that; I always overlook the most obvious question!

  9. #9
    Senior Member IthaDan's Avatar
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    just ziptie the freewheel to the spokes and lose the RD.

    Shimano : Click :: Campy :: Snap :: SRAM : Bang

  10. #10
    The Empire forges on... ThimbleSmash's Avatar
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    Quote Originally Posted by IthaDan View Post
    just ziptie the freewheel to the spokes and lose the RD.
    Look at me, I'm Mr. Meeseeks!
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  11. #11
    Fresh Garbage hairnet's Avatar
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    Quote Originally Posted by frantik View Post
    actually.. i just did a search and you may be able to convert your wheel to a fixed wheel with a Surly Fixxer if you have a freehub (not a freewheel)
    Going by the apparent cheapness of the bike I will say he just needs to unscrew the 6speed freewheel and then install a fixed cog. Chainnrings are most likely riveted.
    Quote Originally Posted by Scrodzilla View Post
    I'd rather ride a greasy bowling ball than one of those things.
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  12. #12
    The Stark Fist of Reality Scrodzilla's Avatar
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    Wait...are you actually suggesting a suicide hub?


  13. #13
    Fresh Garbage hairnet's Avatar
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    Quote Originally Posted by Scrodzilla View Post
    I'd rather ride a greasy bowling ball than one of those things.
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  14. #14
    Junior Member fixedgearworld's Avatar
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    I am very interested in this conversion, please when you have the final bike insert a pic to see your results, great!

  15. #15
    Chainstay Brake Mafia
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    Quote Originally Posted by hairnet View Post
    Going by the apparent cheapness of the bike I will say he just needs to unscrew the 6speed freewheel and then install a fixed cog. Chainnrings are most likely riveted.
    yes i would say it's likely the OP's bike has a freewheel and not a hub. it also would be a bit overkill to use the expensive surly fixer on such a cheap bike

    i've not use a "suicide hub" but there are some in this forum that say it's ok to use as long as you use brakes.

    if you're trying to keep the project at a low price, i'd recommend just going with a single speed instead of a fixed gear. just replace the freewheel cogs with a single speed freewheel and ur good to go.
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  16. #16
    The Stark Fist of Reality Scrodzilla's Avatar
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    Quote Originally Posted by frantik View Post
    if you're trying to keep the project at a low price, i'd recommend just going with a single speed instead of a fixed gear. just replace the freewheel cogs with a single speed freewheel and ur good to go.
    But dude, fixie!

  17. #17
    Chainstay Brake Mafia
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    Quote Originally Posted by Scrodzilla View Post
    But dude, fixie!
    yeah, i know
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  18. #18
    yoked homebrewk's Avatar
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    We need more gifs!

  19. #19
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    Quote Originally Posted by frantik View Post
    I think you're going to need a new rear hub at least. if you have an 18 speed mountain bike the rear hub is probably 130mm but it could be as small as 126mm. If you can't find a fixed mtb wheel (i did a quick search and didnt I would go with a hub meant for 120mm spacing and use a longer axle and lace it to your existing rim.

    actually.. i just did a search and you may be able to convert your wheel to a fixed wheel with a Surly Fixxer if you have a freehub (not a freewheel)

    do your chainrings come off your crank or are they riveted together?
    Yes, I measure it and my MTB rear is currently a 130mm hub.
    I read about the surly fixxer too...not too sure if it is safe enough.
    as for chainrings, it is riveted together......

  20. #20
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    Quote Originally Posted by fixedgearworld View Post
    I am very interested in this conversion, please when you have the final bike insert a pic to see your results, great!
    Hi infact I am starting to have second thots about converting it...as its starting to look no so cost efficient.

  21. #21
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    Quote Originally Posted by Scrodzilla View Post
    But dude, fixie!
    Yup I am just interested in a fixie for now...maybe with a flipflop hub...for switching between a Fixie + SS is not a bad idea either. ;P

  22. #22
    Chainstay Brake Mafia
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    Quote Originally Posted by shchua View Post
    Yes, I measure it and my MTB rear is currently a 130mm hub.
    I read about the surly fixxer too...not too sure if it is safe enough.
    as for chainrings, it is riveted together......
    i'm pretty sure the fixxer is safe. it bolts on in a way where it's not going to come loose.

    the other option is using a flip flop hub meant for 120mm and get a longer axle and some spacers. or cold set the frame to be 120mm. you might even be able to jam a 120 hub in the 130mm spaced rear without cold setting, though it'll be a pain in the butt

    since your crank is riveted you're going to need to replace that too, unless you have the tools to separate them
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  23. #23
    Senior Member zukahn1's Avatar
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    Well if one wants to go dirt cheap and fixie run a Schwinn suicide just beg borrow steel the fixed Shimano multigear freewheel off a old front freewheeling bike screw it on and short chain it to the middle gears front and rear. I have actually done this on beaters and it works ok.

  24. #24
    Senior Member IthaDan's Avatar
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    Quote Originally Posted by zukahn1 View Post
    Well if one wants to go dirt cheap and fixie run a Schwinn suicide just beg borrow steel the fixed Shimano multigear freewheel off a old front freewheeling bike screw it on and short chain it to the middle gears front and rear. I have actually done this on beaters and it works ok.
    Wait, what? Both the rings AND the cogs had ratchet mechanisms. The back one may have been sticky, but it wasn't fixed.

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  25. #25
    Senior Member zukahn1's Avatar
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    The late 70's frontfrweewheeling stuff had fixedgears in back no mech and the freewheel was on the crank.

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