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I picked up the FSA CK-220/IS 155mm crank arms. They clear the frame/motor and give a better 162mm Q-factor than the OEM 170mm. It's the best $30 I've spent in cycling. Anyone considering shorter crank arms should try them to save your knees if you prefer less knee extension, e.g. closer to 140°...

Hi all. I've had my ebike for almost a year and love it. I've been searching for 150 - 155 mm crank arms to replace the Praxis 165 mm arms. Praxis offers replacements as short as 160 mm. I've narrowed down my options to Miranda and FSA. Hope has great crank arms, but I'm looking for a Q factor...