Get a brand - new set of 170 MM Crank Arms tailored for your Bafang BBS/HD Mid - drive Motor! These crank arms bring reliable performance. Note that Crank Arm bolts are sold separately.

Using these Bafang crank arms is easy. First, make sure your Bafang BBS/HD mid - drive motor is properly installed and ready. Then, attach the left and right crank arms according to their markings. When installing, ensure the arms are firmly fixed, but don't over - tighten the bolts. As for maintenance, keep the crank arms clean. After each use, wipe them down to remove dirt and debris. Check the bolts regularly to make sure they're still tight. If you notice any signs of wear or damage, replace the parts promptly. Remember, the crank arm bolts are sold separately, so always have a spare set on hand in case you need to replace them.