The two allen bolts that clamp the arm on to the axle.
You need to back them off before the preload cap will budge, as when the allen bolts are tightened the crank arm closes, clamping the preload cap in place.
@Howard started
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The two allen bolts that clamp the arm on to the axle.
You need to back them off before the preload cap will budge, as when the allen bolts are tightened the crank arm closes, clamping the preload cap in place.