NordicTrack Cycle Bike Commercial S22i/NTEX02117NB.3 Left Crank Arm (MX580)

## NordicTrack Commercial S22i Left Crank Arm Replacement Part

The NordicTrack Commercial S22i Left Crank Arm is a replacement bicycle component for the NordicTrack Commercial S22i cycle bike, model NTEX02117NB.3. It helps restore the connection between the bike’s left pedal and crank assembly when the original left crank arm becomes damaged, worn, or unusable. This part may suit customers repairing an existing indoor cycle and looking for the correct component instead of replacing the entire machine.

This product is identified as the **NordicTrack Cycle Bike Commercial S22i/NTEX02117NB.3 Left Crank Arm**. The manufacturer or brand is **NordicTrack**, and the part number is **438687**. The store SKU and barcode are **MX580**. As a left-side crank component, it is intended for the left side of the compatible exercise bike and replaces the original left crank arm in that assembly.

Product Details and Benefits

A functioning crank arm allows the pedal to connect securely to the bike’s drive system and helps transfer the rider’s pedaling motion through the crank assembly. Replacing a damaged left crank arm can help return the bike to its intended setup and support continued use of the equipment.

Each part has been inspected by skilled technicians for performance and safety before sale. This inspection gives buyers useful reassurance when sourcing a replacement fitness equipment part. The item comes from used fitness equipment stock, which can provide a more cost-conscious repair option while helping extend the service life of existing components and reduce unnecessary waste.

The product listing represents the specific left crank arm described in the title. Photos are provided for reference. Because the seller carries multiple units, the part received may look slightly different from the images while remaining the exact model and component identified for this listing.

Compatibility and Applications

This replacement left crank arm is listed for the following equipment:

- **Brand:** NordicTrack
- **Equipment type:** Indoor cycle bike
- **Compatible model:** Commercial S22i
- **Model designation:** NTEX02117NB.3
- **Component:** Left crank arm
- **Part number:** 438687
- **SKU:** MX580

It is designed for repair or replacement use on the specified NordicTrack Commercial S22i cycle bike. It should not be assumed to fit other NordicTrack bikes or different S22i model variations unless the part number and model information match.

### Why Choose This Replacement Part?

Choosing a replacement crank arm can help repair a bike with a faulty left-side crank assembly without replacing the complete exercise machine. A genuine model-specific listing also makes it easier to compare the replacement component with the part already installed on your bike. Using a inspected used part may help control repair costs and supports the continued use of existing fitness equipment.

Before You Buy

Confirm that your bike is the **NordicTrack Commercial S22i, model NTEX02117NB.3**, and compare the existing component with **part number 438687** before ordering. Check that you need the **left crank arm**, not the right-side version or another crank assembly component. Product images are for reference only, so minor visual differences may appear between the photographed part and the unit shipped. Contact the seller for additional information if you need help confirming compatibility.