# Horizon Fitness CST3 TM119-1US Treadmill Rear Idler Roller (RP445)

## Product Introduction

The Horizon Fitness CST3 TM119-1US Treadmill Rear Idler Roller is a preowned replacement treadmill roller for the rear section of a compatible Horizon Fitness treadmill. This component is intended for customers replacing the original rear idler roller during treadmill repair or refurbishment. If your existing roller has become worn, damaged, or unsuitable for continued use, this part may help you restore the treadmill without replacing the entire machine.

## Product Details and Benefits

This treadmill rear idler roller carries the product number \*\*RP445\*\* and the SKU \*\*RP445\*\*. It belongs to the \*\*Treadmill Rollers\*\* category and comes in preowned condition. Each part has been carefully inspected by skilled technicians before sale to check its condition, performance, and safety.

As a replacement treadmill component, the RP445 gives repair technicians, fitness equipment owners, and service professionals an option for maintaining an existing treadmill. Replacing an individual roller can help you address a specific part issue while keeping the rest of the equipment in service. The part also supports a more sustainable repair approach by extending the useful life of fitness equipment and reducing unnecessary waste.

This listing covers the rear idler roller itself. The product page does not provide material, color, dimensions, or additional technical specifications, so buyers should not assume details that are not listed. Package contents and installation hardware are also not specified.

## Compatibility and Applications

The \*\*Horizon Fitness CST3 TM119-1US Treadmill Rear Idler Roller (RP445)\*\* is listed for use with the \*\*Horizon Fitness CST3 treadmill\*\*, model \*\*TM119-1US\*\*. It is a replacement part for the treadmill’s rear idler roller and is intended for repair, maintenance, or equipment refurbishment.

The source information also lists the serial reference \*\*TM119-B04080021\*\*. Because treadmill parts can vary by model and production configuration, compare your treadmill’s model information, existing roller, and part number before ordering. This part should not be treated as a universal treadmill roller or as a confirmed fit for other Horizon Fitness models unless your equipment documentation confirms compatibility.

## Why Choose This Product

Choosing a preowned Horizon Fitness treadmill roller can provide a practical way to repair a compatible CST3 treadmill while avoiding the cost and waste associated with replacing larger assemblies. The part has been inspected by technicians, and the exact model and part type remain consistent even though the appearance may vary between individual units.

Used parts may show differences in finish or visible wear. However, the seller states that photographs serve as references because multiple units may be in stock. The part supplied will be the listed model and component.

## Before You Buy

Confirm that your treadmill is a \*\*Horizon Fitness CST3\*\*, model \*\*TM119-1US\*\*, and compare the required part with \*\*RP445\*\* before checkout. Review the serial reference \*\*TM119-B04080021\*\* if it matches your equipment records. Dimensions, materials, installation instructions, warranty details, and included hardware are not provided in the listing. Contact the seller if you need additional information before placing your order.

## Details

- **Price:** 89.99 USD
- **Vendor:** Horizon Fitness
- **Type:** Treadmill Rollers
- **Tags:** All

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 89.99 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-cst3-tm119-1us-treadmill-rear-idler-roller-rp445)
> Updated: 2026-08-29