Rail7 crank arm/drive unit issue

Jschlueter

Member
Dec 31, 2019
22
13
Bentonville, AR
Fellas keep an eye on those alloy E13 espec crank arms. Mine needed replacing as they kept coming loose but I didn't realize the damage until I went to install the new set. Bosch says they haven't seen this before. The driveside arm killed the spindle circlip. I only found a small piece of it when I removed the arm. The non drive side looked much worse you can actually see the circlip shape cut into the arm and it appears it was contacting the DU case. No damage to the DU other than the missing circlip.

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