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#1
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Rebuilding on the cheap...
I have a MTB project I'm doing in which I am trying to use what spares
are in my parts box, existing bike parts and trying to do everything as simply and cheaply as possible. With that background, here we go: I have an old LX triple Biopace crankset, 48-38-28. I have a newer FD-M580 LX front derailleur. Now, the learned among you will know what my problem is immediately, but to you others, I have a problem that needs solving. Seems that a ten-tooth spacing is no good with this FD, as the inner cage hangs on the middle chainring when the thing is mounted the proper distance away from the big ring's tallest teeth (Biopace, the added complication) Supposedly, I need twelve-tooth spacing from big-to-middle. My idea was to spend some small amount of money and purchase a Sugino 36-tooth middle ring. Please, you gurus out there - will this be the easy fix-it I'm praying for? Thanks, E.P. |
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#2
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Rebuilding on the cheap...
Or...
Purchase a 110 BCD 50t big ring??? I guess the real tech question is - will a twelve-tooth difference in the big/middle ring allow the use of the LX FD I have? Thanks again, E.P. |
#4
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Rebuilding on the cheap...
A Muzi wrote: wrote: I have a MTB project I'm doing in which I am trying to use what spares are in my parts box, existing bike parts and trying to do everything as simply and cheaply as possible. With that background, here we go: I have an old LX triple Biopace crankset, 48-38-28. I have a newer FD-M580 LX front derailleur. Now, the learned among you will know what my problem is immediately, but to you others, I have a problem that needs solving. Seems that a ten-tooth spacing is no good with this FD, as the inner cage hangs on the middle chainring when the thing is mounted the proper distance away from the big ring's tallest teeth (Biopace, the added complication) Supposedly, I need twelve-tooth spacing from big-to-middle. My idea was to spend some small amount of money and purchase a Sugino 36-tooth middle ring. Please, you gurus out there - will this be the easy fix-it I'm praying for? I would try raising the front changer enough to clear first. If you are unhappy with the shift response then try a new ring. Yeah, I did that. Shifted like "poo". Worse than poo, really. Shifting to the larger from smaller rings sucked pretty bad, but shifting from bigger to smaller sucked really, really bad. And yes, those are precise, technical terms. Thanks for the tip - I'm kinda sorry it wasn't that easy. E.P. |
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