Hi, looking to convert our Avalanche tandem envy 29inch currently with 42, 32, 24 setup to road bike blades - 52, etc. 170mm crank.
Two cycle shops in cape town told me they cannot assist after trying to source parts.
Problems encountered so far:
Chainrings cannot be replaced individually , need to replace entire crank on the one side of tandem.
Found a replacement with 170mm but the actual square hole through crank sits square with crank, not positioned as newer cranks.(corner of square hole in line with the crank) if this one is fitted the crank on the other side (32tooth crank) will sit at incorrect angle with other side.
So next step is to replace that side of the crank as well, but no one can find stock.
Two years ago there was a forum regarding this exact conversion.
Anybody with knowledge on this?
Apologies, my use of words for cycling parts are probably incorrect but hope it makes sense.
Thanks
