# Precor M9.31 Treadmill Rear Idler Roller (RP394)

\# Precor M9.31 Treadmill Rear Idler Roller (RP394)

The Precor M9.31 Treadmill Rear Idler Roller (RP394) is a replacement treadmill roller for the rear section of a Precor M9.31 treadmill. It supports the treadmill belt at the back of the running deck and forms part of the belt’s movement system. If the original rear idler roller has become worn or needs replacement during treadmill service, this part can help restore the correct rear roller component for the machine.

## Product Details and Benefits

This product is identified as a \*\*Precor M9.31 treadmill rear idler roller\*\*. A rear idler roller sits beneath the back portion of the walking belt. As the belt moves, the roller helps guide and support it through the rear of the treadmill.

Replacing a worn or damaged roller can help a service technician address a problem with the treadmill’s existing rear roller assembly. The correct replacement part also helps avoid relying on a mismatched roller that may not suit the machine’s original design. For repair shops, fitness equipment technicians, and treadmill owners handling maintenance, the RP394 identification makes it easier to match the part with the intended equipment.

The product listing provides the following identifying information:

\- \*\*Product name:\*\* Precor M9.31 Treadmill Rear Idler Roller  
\- \*\*Brand:\*\* Precor  
\- \*\*Product category:\*\* Treadmill Rollers  
\- \*\*Part number:\*\* RP394  
\- \*\*SKU:\*\* RP394  
\- \*\*Barcode:\*\* RP394

The listing includes a roller measurement reference image. However, the available product information does not state the roller’s exact dimensions, material, color, weight, bearing details, or other construction specifications. Review the measurement reference and compare it with the existing roller before ordering.

## Compatibility and Applications

The RP394 rear idler roller is listed for the \*\*Precor M9.31 treadmill\*\*. It is intended for use as a replacement rear idler roller in that specific treadmill model. This part is not described as a universal treadmill roller, so customers should not assume compatibility with other Precor models or treadmills from different brands.

Use this part when servicing or replacing the rear roller on a Precor M9.31 treadmill. It may suit repair work involving the treadmill belt support system, but the listing does not provide a diagnosis for belt noise, slipping, tracking problems, or other treadmill issues. Check the complete roller assembly and surrounding components before deciding which part needs replacement.

## Why Choose This Product

The RP394 gives you a clearly identified replacement option for the Precor M9.31 treadmill’s rear idler roller. Matching the brand, model, and part number can make equipment maintenance more straightforward and reduce the risk of ordering an incompatible treadmill roller. It can serve as a useful replacement component for treadmill owners, maintenance teams, and fitness equipment repair professionals.

## Before You Buy

Confirm that your treadmill is a \*\*Precor M9.31\*\* and compare the existing rear idler roller with the available measurement reference. Verify the part number \*\*RP394\*\* before placing an order. The product listing does not specify package quantity, installation instructions, warranty coverage, or additional included hardware. Check those details with the seller if they affect your repair.

## Details

- **Price:** 129.99 USD
- **Vendor:** Precor
- **Type:** Treadmill Rollers
- **Tags:** All

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 129.99 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/precor-m9-31-treadmill-rear-idler-roller-rp394)
> Updated: 2026-08-29