# Precor TRM 631 661 681 Treadmill Rear Idler Roller (RP578)

\# Precor TRM 631, 661, 681 Treadmill Rear Idler Roller RP578

The Precor TRM 631, TRM 661, and TRM 681 treadmill rear idler roller is a preowned replacement part for compatible Precor treadmills. This rear idler roller carries the product code RP578 and belongs to the treadmill roller category. If the rear roller on your Precor treadmill needs replacement, this part may help you restore the equipment with the correct model-specific component.

## Product Details and Benefits

This product is a \*\*Precor treadmill rear idler roller\*\* designed for use with selected Precor TRM treadmill models. The roller forms part of the treadmill’s running belt assembly at the rear of the machine. Replacing a worn or damaged rear idler roller can help address a component issue in that area and support proper maintenance of the treadmill.

The item is listed as \*\*preowned\*\*, so it may show signs of previous use or normal handling. Buyers should review the available product photos and confirm that the part’s visible condition suits their repair needs before ordering. The listing does not provide dimensions, material details, color, warranty information, or installation instructions.

The product identification details are:

\- \*\*Brand:\*\* Precor  
\- \*\*Product name:\*\* TRM 631, 661, 681 Treadmill Rear Idler Roller  
\- \*\*Product type:\*\* Treadmill rear idler roller  
\- \*\*Part number:\*\* RP578  
\- \*\*SKU:\*\* RP578  
\- \*\*Barcode:\*\* RP578  
\- \*\*Condition:\*\* Preowned

## Compatibility and Applications

The RP578 rear idler roller is listed for the following Precor treadmill models:

\- Precor TRM 631  
\- Precor TRM 661  
\- Precor TRM 681

This part is intended as a replacement rear idler roller for those Precor TRM treadmill models. It suits treadmill owners, repair technicians, service departments, fitness equipment resellers, and anyone maintaining compatible Precor commercial or home fitness equipment.

Compatibility depends on the exact treadmill model and the part originally installed. Model names can share similar designs while using different replacement components, so do not rely on appearance alone when selecting a treadmill roller.

## Why Choose This Product

Choosing the correct rear idler roller can make parts sourcing easier when you maintain an older or previously used Precor treadmill. The RP578 part number gives you a clear reference for comparing the replacement with your existing component or service records. Its preowned condition may also suit buyers looking for a replacement part for repair, refurbishment, or parts inventory.

## Before You Buy

Confirm that your treadmill matches one of the listed models: \*\*Precor TRM 631, TRM 661, or TRM 681\*\*. Compare the existing rear idler roller and verify the part number \*\*RP578\*\* whenever possible. Also check the product photos carefully for condition and visible wear.

The listing does not state whether installation hardware is included, and it does not provide technical measurements or fitting instructions. Consult your treadmill’s service information or a qualified fitness equipment technician if you need help confirming fitment or installing the replacement part.

## Details

- **Price:** 119.99 USD
- **Vendor:** Precor
- **Type:** Treadmill Rollers
- **Tags:** All

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 119.99 USD | In stock |

## Images

- RP578
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## Additional Information

- **Condition:** PREOWNED

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> Source: [Cardio Equipment Parts](https://www.cardioequipmentparts.com/products/precor-trm-631-661-681-treadmill-rear-idler-roller-rp578)
> Updated: 2026-08-29