Those failures on the spider look like they can be caused by the bike falling over with the pedal hitting the ground first. This creates a lot of torque in that area. Failure could occur through fatigue or a badly placed notch (or both)
@Carabo started
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Those failures on the spider look like they can be caused by the bike falling over with the pedal hitting the ground first. This creates a lot of torque in that area. Failure could occur through fatigue or a badly placed notch (or both)