# Life Fitness CLST Treadmill Tensioner Spring MX404
The Life Fitness CLST Treadmill Tensioner Spring (MX404) is a replacement tensioner spring for a Life Fitness CLST treadmill. It helps provide the spring tension required by the treadmill’s tensioning system. If the original spring has broken, stretched, or gone missing, this part can help restore the equipment’s tensioning function and support proper servicing.
Product Details and Benefits
This product is identified as a **tensioner spring** for Life Fitness CLST treadmill equipment. Its purpose is to apply tension within the relevant treadmill assembly, helping the connected components remain correctly positioned during use. A working tensioner spring supports the proper operation of the system and can help a technician address a tension-related repair without replacing the entire treadmill assembly.
The part is listed under the following product details:
- **Brand:** Life Fitness
- **Product name:** CLST Treadmill Tensioner Spring
- **Part number:** MX404
- **SKU:** MX404
- **Barcode:** MX404
- **Equipment type:** Treadmill
- **Compatible equipment:** Life Fitness CLST treadmill
- **Product category:** Treadmill replacement part
The compact part format makes it suitable for repair and maintenance work where the original tensioner spring needs replacement. Using the correct part number helps reduce the risk of ordering a spring that does not match the intended treadmill assembly.
Compatibility and Applications
The MX404 tensioner spring is listed for use with the **Life Fitness CLST treadmill**. It is intended for treadmill repair, maintenance, and replacement-part applications. The part replaces the tensioner spring component rather than serving as a complete tensioning assembly or a complete treadmill part.
Before ordering, compare the part number on your existing component or service documentation with **MX404**. Also confirm that your equipment is a Life Fitness CLST treadmill. The product information does not list compatibility with other Life Fitness treadmill models, other brands, or different equipment series, so do not assume that the spring fits machines outside the specified CLST application.
Why Choose This Product
Choosing the correct Life Fitness treadmill tensioner spring can help keep a repair focused on the failed component. The MX404 part number gives service technicians, equipment owners, and maintenance departments a clear reference when sourcing a replacement for a CLST treadmill.
This part may be useful when a treadmill requires servicing because of a damaged, worn, or missing tensioner spring. Replacing the specific spring can help avoid unnecessary replacement of larger assemblies when the spring itself is the part that requires attention.
Before You Buy
Confirm all of the following before placing your order:
- Your treadmill is a **Life Fitness CLST model**.
- The required tensioner spring part number is **MX404**.
- The replacement matches the spring being removed or the part listed in your repair documentation.
- The part number, SKU, and barcode shown for this item are **MX404**.
The listing does not provide dimensions, material, color, package quantity, installation instructions, warranty details, or condition information. Review those details with the seller or a qualified treadmill service technician if they are important to your repair. Installation should follow the equipment’s appropriate service procedure.
