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  1. #1
    MaNiC! NZLcyclist's Avatar
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    MY conversion project

    Well here it is. The old skool 12 speed that I am going to convert to a Fixie.

    Will initially use the road cranks, and put a standard chainring on instead of a bio-pace.

    I have ordered a set of Miche track hubs, and have yet to decide on everything else!

    Brendon
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  2. #2
    One speed: FAST ! fordfasterr's Avatar
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    awesome !

    What make/model is that bike ?

    Looks great for a conversion !
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  3. #3
    Banned. teiaperigosa's Avatar
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    Quote Originally Posted by fordfasterr
    awesome !

    What make/model is that bike ?

    Looks great for a conversion !

    well....the make says it right there on the picture AVANTI, but then again...judging by your avatar, reading is not that fundamental for ya anyways


    lol...hate to pick on you(well...not really), but..you left it open for it

  4. #4
    Lunigma
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    Quote Originally Posted by NZLcyclist
    Will initially use the road cranks, and put a standard chainring on instead of a bio-pace.
    you should ride witht he biopace rings and give them a shot before you take them off. some people like em some don't. ive been riding my fixie with biopace and it feels great! http://sheldonbrown.com/biopace.html sheldon rides his fixies with bio pace too

  5. #5
    eert a ekil yzarc SpiderMike's Avatar
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    Good luck with your conversion. Finished my conversion and loving it. Working on getting pix.

  6. #6
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    yo I think you may have just identified my bike. I got the same gradient paint scheme, same downtube shifters and biopace rings, same goofy fluted seatpost, and lugs look exactly the same.

    Does that sticker on the seattube happen to claim mannesman tubing?

  7. #7
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    That looks like a pretty decent bike. I think I see 105 components.

    Your cranks will work fine, with or without the biopace chainrings.

  8. #8
    Barbieri Telefonico huhenio's Avatar
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    Try the little by little approach. Get it minimally functional to see if you like it.

    Fixed is not everyone's cup of tea ... nothing wrong with that.
    Giving Haircuts Over The Phone

  9. #9
    MaNiC! NZLcyclist's Avatar
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    Yes 105 components, although quite old and going out the door due to the fact that well.. they aint needed.

    This bike will be my commuter in Hamilton, which is rather flat.

    I might try the bio-pace rings, is there a way that I can get the deraileur to work as a tensioner? - Wait that only works with freewheel SS.... haha

    Edit - pic served its purpose - thanks for heads up.

    The frame is CR-MO.

    Yes this is an Avanti Ultra, made by a NZ company probably back in the 80's, or early 90's at best.

    Lunigma - did you need any sort of tensioning device at all? SB gives me the thought that I don't need one...

    Regards,
    Brendon
    Last edited by NZLcyclist; 12-22-05 at 10:07 PM.
    Scott Speedster S30
    Shimano 105 Shifters and Derailleurs
    FSA Energy 50/34 Compact Cranks
    Spinergy Stealth PBO Race wheels
    Sram OG 1070 casette

  10. #10
    bah Fantomas's Avatar
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  11. #11
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    Those dropouts will work perfect. You will not need to use the old derailleur for chain tension.

    You will not have any problems with the dropouts.

    These articles might be of worth to do a quick read:

    http://sheldonbrown.com/fixed-conversion.html

    http://sheldonbrown.com/deakins/how-...onversion.html

    You probably have a good idea of what it takes to do a conversion, but, hey, you might learn something new.

  12. #12
    MaNiC! NZLcyclist's Avatar
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    Thanks Boston, already going the SB's stuff, that stuff is usefull too.

    Regards,
    Brendon
    Scott Speedster S30
    Shimano 105 Shifters and Derailleurs
    FSA Energy 50/34 Compact Cranks
    Spinergy Stealth PBO Race wheels
    Sram OG 1070 casette

  13. #13
    Lunigma
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    Quote Originally Posted by NZLcyclist
    Yes 105 components, although quite old and going out the door due to the fact that well.. they aint needed.

    This bike will be my commuter in Hamilton, which is rather flat.

    I might try the bio-pace rings, is there a way that I can get the deraileur to work as a tensioner? - Wait that only works with freewheel SS.... haha

    that is the sort of dropouts it has... anyone care to elaborate on any problems I may face?

    The frame is CR-MO.

    Yes this is an Avanti Ultra, made by a NZ company probably back in the 80's, or early 90's at best.

    Lunigma - did you need any sort of tensioning device at all? SB gives me the thought that I don't need one...

    Regards,
    Brendon
    you don't need to use a tensioner, just leave a little bit of slack, once your'e adjusting the wheel you'll figure it out. it feels pretty cool, it's hard to describe.

    oh and heads up, you might not want to use sheldon's pics without permision

  14. #14
    jack of one or two trades Aeroplane's Avatar
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    Biopace rings are not being produced anymore, and have a somewhat faithful following, so don't throw them away.

    That paintjob is awesome. So are fluted seatposts. I think track drops on that thing (even though it's a conversion) would look sweet.
    Quote Originally Posted by Dr Irwin Goldstein
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    the most irrational form of exercise I could ever bring to discussion.

  15. #15
    aka mattio queerpunk's Avatar
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    nice. i like avanti because they make nonlatex condoms, and i'm latex allergic.
    the hipster myth.

    i practice vagabondery.

  16. #16
    Lunigma
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    Quote Originally Posted by Aeroplane
    Biopace rings are not being produced anymore, and have a somewhat faithful following, so don't throw them away.
    that's a really good point, hehe you could even sell them to sheldon.
    is it just me or do the fork drop outs look a little weird. i can't put my finger on it, they look like they just go straight out.

  17. #17
    crotchety young dude el twe's Avatar
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    I'd recommend a front tire...
    Quote Originally Posted by CardiacKid View Post
    I explained that he could never pay me enough cash for the amount of work I had put into that bike and the only way to compensate me for it was to ride the hell out of it.
    IRO Angus Casati Gold Line

  18. #18
    MaNiC! NZLcyclist's Avatar
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    Quote Originally Posted by el twe
    I'd recommend a front tire...
    Scott Speedster S30
    Shimano 105 Shifters and Derailleurs
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  19. #19
    The Red Lantern Rev.Chuck's Avatar
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    Keep the biopace for a while anyway. It is interesting to watch the chain move back and forth without losing tension.
    You can fix it up single for now. Just remove all the shift stuff and pick a gear that gives an OK chainline.
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    I am in the woods and I have gone crazy.

  20. #20
    MaNiC! NZLcyclist's Avatar
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    The rear rim is shot to hell (cracks etc) so I need a new wheel before I ride, so I might as well do the whole drive train in one go.

    Brendon

    Quote Originally Posted by Rev.Chuck
    Keep the biopace for a while anyway. It is interesting to watch the chain move back and forth without losing tension.
    You can fix it up single for now. Just remove all the shift stuff and pick a gear that gives an OK chainline.
    Scott Speedster S30
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  21. #21
    Cat 5 socaljoe's Avatar
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    Quote Originally Posted by Lunigma
    you should ride witht he biopace rings and give them a shot before you take them off. some people like em some don't. ive been riding my fixie with biopace and it feels great!
    How does that work out with chain tension? Don't you contantly feel like the chain is going to bounce off during the slack portions for the pedal stroke?

    I had old Dura Ace with BioPace rings on the bike that eventually became my conversion, and I didn't even try it before putting on a round chainring, I just assumed that it would be whack.

  22. #22
    ass hatchet slopvehicle's Avatar
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    Quote Originally Posted by socaljoe
    How does that work out with chain tension? Don't you contantly feel like the chain is going to bounce off during the slack portions for the pedal stroke?

    I had old Dura Ace with BioPace rings on the bike that eventually became my conversion, and I didn't even try it before putting on a round chainring, I just assumed that it would be whack.
    I'm gonna say that (in my Schlitz-addled mind) the chain wraps around enough of the chainring at any given moment to sufficiently eliminate any change in chain slack. The links are always engaging ring that's both "fat" and "narrow".

    Therefore, everything would be peachy. Ever watch a geared bike w/ Biopace? Did the deraileur move back n' forth picking up slack with every rotation of the cranks?


    I didn't think so.

  23. #23
    MaNiC! NZLcyclist's Avatar
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    Started the strip down tonight! here's some pictures.

    Whole bike just as I was starting to attack it,
    Biopace crankset (inner ring is a 42T which will be perfect for gearing...
    All of what I took off tonight.

    Any ideas as to what I can do to the old mounts for the DT shifters?

    Brendon
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    Scott Speedster S30
    Shimano 105 Shifters and Derailleurs
    FSA Energy 50/34 Compact Cranks
    Spinergy Stealth PBO Race wheels
    Sram OG 1070 casette

  24. #24
    Spelling Snob Hobartlemagne's Avatar
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    I use a biopace chainring on my fixie. I like it a lot, but learned something
    VERY IMPORTANT- when you bolt on the rear wheel, setting the chain tension,
    make sure the Biopace is placed in the 'loose' position. (pedals facing forward
    and backward) That way, the rotation will slightly tighten the chain then return
    it to your set tension. Do it the other way, and the chain may bounce off the
    gears when the ride gets bumpy.

  25. #25
    eert a ekil yzarc SpiderMike's Avatar
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    Quote Originally Posted by NZLcyclist
    Any ideas as to what I can do to the old mounts for the DT shifters?
    I was tinkering on the bike the other day. Putting the tools away, I found a pair orphaned spikes. The spikes went to an old pair of MTB shoes. I took the DT shifters off, and the spike fit, but there is a gap. Working on getting something to fill the gab. I'll post about it when I'm done.

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