# Horizon Fitness GS950T Treadmill Rear Idler Roller (RP403)

\# Horizon Fitness GS950T Treadmill Rear Idler Roller (RP403)

The Horizon Fitness GS950T Treadmill Rear Idler Roller (RP403) is a replacement treadmill roller designed for the rear section of a Horizon Fitness GS950T treadmill. The rear idler roller supports the treadmill belt as it travels around the back of the running deck. If the original roller requires replacement, this part can help restore the correct belt support and keep the treadmill’s belt system properly equipped.

## Product Details and Benefits

This product is a \*\*rear idler roller for a treadmill\*\*. It belongs to the treadmill rollers category and carries the part number and SKU \*\*RP403\*\*. The product listing identifies it specifically for the \*\*Horizon Fitness GS950T treadmill\*\*, making it easier to compare with the component currently installed on your machine.

A treadmill rear idler roller forms part of the belt-running system. It sits at the back of the treadmill and works with the running belt as the belt moves during use. Replacing a worn, damaged, or otherwise faulty rear roller can help address a component issue without replacing the entire treadmill.

The RP403 provides a model-specific replacement option for owners, repair technicians, and service professionals working on a Horizon Fitness GS950T treadmill. Using the correct part number helps reduce the risk of ordering a roller intended for a different treadmill model.

## Compatibility and Applications

The \*\*Horizon Fitness GS950T Treadmill Rear Idler Roller (RP403)\*\* is listed for use with the \*\*Horizon Fitness GS950T treadmill\*\*. Its intended application is replacement of the treadmill’s rear idler roller.

This part is suitable for customers who need to repair or service the rear belt roller assembly on a compatible GS950T treadmill. It may also help when replacing a rear roller removed during treadmill maintenance, provided the part number and machine details match.

The product page also lists the serial reference \*\*TM6260912CK00381\*\*. Use this information, along with the model name and part number, when comparing the part with your treadmill’s existing component or service records.

## Why Choose This Product

Choosing a part identified for the Horizon Fitness GS950T gives you a clear reference point when sourcing a replacement treadmill roller. The RP403 part number makes the item easier to identify for future maintenance, repair records, or communication with a service technician.

This replacement part can be useful when you want to repair the rear roller area of an existing treadmill rather than replace the complete machine. Confirming compatibility before purchase helps you avoid delays caused by ordering an incorrect roller.

## Before You Buy

Verify that your treadmill is a \*\*Horizon Fitness GS950T\*\* and that \*\*RP403\*\* matches the required rear idler roller part number. The available product information does not provide roller measurements, material, color, installation instructions, package quantity, warranty details, or included hardware. Check those requirements before ordering, especially if your repair needs additional components.

\*\*Product name:\*\* Horizon Fitness GS950T Treadmill Rear Idler Roller  
\*\*Part number/SKU:\*\* RP403  
\*\*Product category:\*\* Treadmill Roller  
\*\*Compatible equipment:\*\* Horizon Fitness GS950T treadmill  
\*\*Intended use:\*\* Replacement rear idler roller for treadmill belt support

## Details

- **Price:** 99.99 USD
- **Vendor:** Horizon Fitness
- **Type:** Treadmill Rollers
- **Tags:** All

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 99.99 USD | In stock |

## Images

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## Additional Information

- **Condition:** PREOWNED

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> Source: [Cardio Equipment Parts](https://www.cardioequipmentparts.com/products/horizon-fitness-gs950t-treadmill-rear-idler-roller-rp403)
> Updated: 2026-08-29