Maybe I can salvage them if I find the correct tap/die to try and clean up the threads that remain, better than just chucking the arms in the trash.
The other issue I had may be self induced though I can't figure out how it happened but on a ride the left hand pedal backed out far enough that when I tried to clip out of my SPD's instead the threads in the crank arm pulled out and the pedal fell off still attached to my shoe. The Shimano bolts will work fine with the Miranda arms and allow for higher torquing of the arms. Adding to this issue is that I couldn't get the Shimano safety plate/pin or whatever they call it that fits between the crank arm bolts and has a pin that seats into a hole in the spindle to fit at all with these cranks. Unlike a normal crankset where you barely tighten the bolts to set the pre-load these crank arms seem to need additional torque, I had one arm fall off after the bolt backed out on my second ride, lucky for me I managed to find the bolt and re-install it for the ride back home. First off don't use the included crank bolts as they are soft plastic and I couldn't torque them enough without deforming those bolts. I have a set of the Miranda DeltaSH's at 160mm and I liked them but had a couple of issues.
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