Bicycle Mechanics - crank compatability issues
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04-10-06, 08:07 PM
I have an old Diamondback AScentex mtn bike that had a biopace crank on it when I bought it. I have tried to swap it out with a different crank, (a trutiv isoflex and a cheapo target bike crank) and they both had the same problem. The crank didnt seem to fit as far on the bb spindle as the biopace crank, and thus the f derailleur wouldnt shift the chain into the largest 2 sprockets. any ideas why this could be? is a bike equipped with a biopace from the factory doomed to be a biopace bike forever?
04-10-06, 08:25 PM
Obvious questions: Were the crank bolts torqued tight enough and the front derailleur limit screws and cable re-adjusted?
04-11-06, 07:30 AM
yes, tried all that. I can do a direct swap from the biopace which will work fine, and then put on a different crank and have totally different results
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