Tandem left side crank problem
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Tandem left side crank problem
I have an older entry level Univega Sport Touring tandem. The left rear stoker (non-drive) crank arm fits over a square taper spindle. The hole in the crank arm has rounded shoulders, causing the crank arm to be out of alignment with and forward of the drive side crank arm - not perfectly 180' opposed.
The crank arm is a press fit into the chain ring that couples it via the chain with the captains chain ring, so I cannot replace the arm without replacing the chain ring as well. I was thinking maybe a right side spider arm and single chain ring (BMX crank?), but the pedal thread wouldn't be right.
Can anyone offer a fix/solution/suggestion for this problem? does anyone have a spare 170mm tandem left crank arm/chain ring assembly they can part with, or perhaps a left side set?
Regards,
John D.
The crank arm is a press fit into the chain ring that couples it via the chain with the captains chain ring, so I cannot replace the arm without replacing the chain ring as well. I was thinking maybe a right side spider arm and single chain ring (BMX crank?), but the pedal thread wouldn't be right.
Can anyone offer a fix/solution/suggestion for this problem? does anyone have a spare 170mm tandem left crank arm/chain ring assembly they can part with, or perhaps a left side set?
Regards,
John D.
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Ya might find something to help you out on this page of Sheldon's >>
https://www.sheldonbrown.com/tandem-build.html
https://www.sheldonbrown.com/tandem-build.html