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I have an old bike that has a cheap square taper crankset.

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And I would like to attach a crank arm power meter to it that will fit a Shimano crankset.

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Is there an adapter that can fit into the square hole and offer grips for the Shimano crank to hold onto or do I have to buy something like a Tiagra or Sora crankset and fit that to my bike? (the crankset would be worth more than the bike at that point haha)

David Alsh
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1 Answers1

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Are you able to replace the entire existing square taper bottom bracket with a compatible cartridge with the same splined fitting? This assumes you bought the power meter already. Of course you need both crank arms even if just one side has a power meter.

The other option is to get a pedal-based power meter instead of a crank-based one.

Paul H
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Criggie
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    A pedal based PWR meter would also be transferable between different bicycles in a matter of minutes with a simple pedal wrench. – Carel Apr 25 '22 at 10:55