I had a problem with my square taper crank arm coming loose and getting trashed by the crank spindle.
These new-fangled Hollowtech II whiz-bang cranksets can be found on the Internets for cheap, as 3×9 drivetrains are no longer fashionable.
Old damaged crank arm
Big Wrench to remove the old bottom bracket
New hollowtech crank
Test ride successful
I’ve been running a Hollowtech on the Trucker since Day One. Seems pretty bullet proof.