BAFANG Bottom Bracket Torque Sensor SR PA01.32.ST-WX

Price facts

• Last seen at $54.95 at Walmart on Nov 13.

Our take on the BAFANG Bottom Bracket Torque Sensor SR PA01.32.ST-WX

The BAFANG SR PA01.32.ST-WX is a bottom-bracket torque sensor for e-bike drive systems. It measures how hard you pedal and feeds that signal to the motor controller through a 6-pin connector, so assist rises and falls with your effort. It is a replacement part for riders building or repairing a BAFANG mid-drive setup, not a universal fit for any bike. It ships as a bulk-packaged unit without a box, so expect the part alone with no retail accessories.

BAFANG Bottom Bracket Torque Sensor SR PA01.32.ST-WX prices at every store

BAFANG Bottom Bracket Torque Sensor SR PA01.32.ST-WX price history

Lowest price we've seen: $54.95 on Nov 13 at Walmart. Tracked across 1 store since Nov 13.

Questions and answers

What does a torque sensor do on an e-bike?

It senses how hard you push on the pedals and tells the controller how much motor assist to add. Assist then tracks your effort instead of switching on and off with pedal rotation alone.

Will it fit my e-bike?

It is built for BAFANG mid-drive systems with a matching bottom-bracket mount and 6-pin controller connection. Check your motor model and connector before buying; it is not a universal part.

What is in the package?

The sensor comes in bulk packaging with no box. Expect the sensor unit itself; cables, hardware and manuals are not included unless your kit supplies them.

Do I need to calibrate it after installing?

Yes. The sensor has to be set up with the controller so assist responds correctly to pedal pressure. Follow your drive system's installation procedure.

Is it a good upgrade over a cadence sensor?

A torque sensor gives smoother, effort-based assist than a simple cadence sensor. It is worth it if your controller supports it and you want more natural pedal response.

Where is the BAFANG Bottom Bracket Torque Sensor SR PA01.32.ST-WX cheapest?

At Walmart, for $54.95, as of our latest check.

What do buyers say about the BAFANG Bottom Bracket Torque Sensor SR PA01.32.ST-WX?

Rated 5 out of 5 from 1 ratings.

Stores we've priced the BAFANG Bottom Bracket Torque Sensor SR PA01.32.ST-WX at

• Walmart deals and prices

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