Give your Bafang mid drive a clean, high-shine upgrade. These custom polished 170mm crank arms are a direct bolt-on fit for the Bafang BBS01, BBS02, and BBSHD square taper spindle — the same reliable fitment as stock, with a bright polished aluminum finish that stands out on any build.
Polished Finish, Stock Fitment
Whether you're restoring a worn BBSHD conversion or finishing off a custom build, polished crank arms are one of the easiest ways to dress up your drivetrain. They mount exactly like the originals, so you get the look upgrade without changing your chainring, spider, or pedals. Prefer a stealth look? See our black 170mm BBS02 / BBSHD crank arms.
Features
-
Custom polished aluminum finish – bright, high-shine look
-
Direct fit for Bafang mid drives: BBS01, BBS01B, BBS02, BBS02B, and BBSHD
-
JIS square taper interface – matches the Bafang BBS spindle, no adapters needed
-
170mm length – the standard, most versatile crank length for commuting, trail, and cargo e-bikes
-
Sold as a pair – left and right arm included
-
Standard 9/16" pedal threads – works with standard adult bike pedals
Specifications
| Compatibility |
Bafang BBS01 / BBS01B / BBS02 / BBS02B / BBSHD |
| Crank Length |
170mm |
| Spindle Interface |
JIS square taper (Bafang BBS spindle) |
| Pedal Thread |
9/16" x 20 TPI |
| Material |
Aluminum alloy |
| Finish |
Custom polished |
| Quantity |
1 pair (left + right) |
Installation Tips
- Remove your old arms with a standard crank puller.
- Clean the spindle taper before installing — no grease on a square taper interface.
- Torque crank bolts to spec and re-check after your first 50 miles.
- Keep the polished finish bright with a quick wipe of aluminum polish as needed.
Frequently Asked Questions
Will these fit a Bafang M600, M560, or Ultra motor?
No. These are for the BBS series (BBS01/BBS02/BBSHD) square taper spindle only. For M600/M560 motors, see our HPC 155mm CNC Performance Cranks (M600/M560); for Ultra motors, see the HPC 155mm CNC Ultra Drive Cranks.
Do these come with pedals?
No, pedals are sold separately. Any standard 9/16" pedal will fit.
Do these work with the Hi Power Cycles mid drive conversion kit?
Yes — our High Performance Mid Drive Conversion Kit uses the same BBS spindle, so these are a direct replacement.
Questions about fitment? Email sales@hpcbikes.com — our team in Simi Valley, CA is happy to help. Browse more cranksets and crank arms.
