## True Fitness TPS300-3 Treadmill Rear Idler Roller (RP399)
The True Fitness TPS300-3 Treadmill Rear Idler Roller is a replacement treadmill roller designed for the rear section of a True Fitness TPS300-3 treadmill. This component supports the treadmill belt at the back of the running platform and helps maintain the correct belt path during use. If the original rear roller shows signs of wear or needs replacement, this part may help restore the treadmill’s proper roller arrangement.
Product Details and Benefits
This product is a treadmill rear idler roller for True Fitness equipment. The roller fits at the rear of the treadmill rather than at the motor or front drive position. Its purpose is to support the belt’s return path and work as part of the treadmill’s belt and roller assembly.
Replacing a worn or damaged rear idler roller can help address a roller-related maintenance issue and support continued servicing of the treadmill. A correctly matched replacement part also helps you avoid adapting an incorrectly sized roller or using a component intended for a different treadmill model.
The product is listed under the following details:
- **Brand:** True Fitness
- **Product name:** TPS300-3 Treadmill Rear Idler Roller
- **Product category:** Treadmill Rollers
- **Part number:** RP399
- **SKU:** RP399
- **Barcode:** RP399
- **Equipment type:** Treadmill
- **Roller position:** Rear idler
The product page also references a roller measurement image. Review that reference when comparing the existing roller with this replacement part. No material, color, exact dimensions, bearing specifications, or warranty details are provided in the available product information.
Compatibility and Applications
The True Fitness TPS300-3 Treadmill Rear Idler Roller is listed for use with the **True Fitness TPS300-3 treadmill**. It is intended for the rear idler roller position and is suitable for repair or maintenance work involving that specific treadmill model.
The product source also includes the serial reference **13-TPS300656D**. Check this information against the identification details on your treadmill before ordering. The model name alone may not always confirm fitment for every production version, so compare the original part, roller measurements, and treadmill identification information where possible.
This is a component for treadmill repair. It is not a complete treadmill, drive motor, walking belt, front roller, or treadmill deck.
## Why Choose This Replacement Roller?
Choosing a part identified for the True Fitness TPS300-3 gives you a clear starting point when replacing the treadmill’s rear idler roller. The stated part number, RP399, makes it easier to compare the replacement with service records, the original component, or a parts list.
A model-specific rear roller can also simplify the repair process by helping you identify the correct component position before disassembly. Always follow appropriate treadmill service procedures and make sure the equipment is switched off and disconnected from power before beginning maintenance.
Before You Buy
Confirm that your treadmill is a **True Fitness TPS300-3** and check the serial reference **13-TPS300656D** if applicable. Compare the existing rear roller with the product’s measurement reference before placing an order. The listing does not specify installation hardware, tools, package quantity, or fitting instructions, so verify what you need for the repair separately.
