# Precor M9.21i Treadmill Rear Idler Roller (RP380)

\## Precor M9.21i Treadmill Rear Idler Roller (RP380)

The Precor M9.21i Treadmill Rear Idler Roller is a replacement treadmill roller designed for the rear section of a compatible Precor M9.21i treadmill. The rear idler roller supports the running belt as it travels around the back of the treadmill deck. If the existing roller has worn or requires replacement, this part can help restore the correct roller component to the machine.

This product is identified as \*\*RP380\*\* and is listed under the \*\*Treadmill Rollers\*\* category. It provides a specific replacement option for customers servicing a Precor M9.21i treadmill and looking for a rear idler roller by part number or model compatibility.

## Product Details and Benefits

The \*\*Precor M9.21i Rear Idler Roller RP380\*\* serves as the rear roller assembly point for the treadmill running belt. The roller helps guide the belt around the rear of the deck while the treadmill operates. Replacing a worn or damaged rear idler roller may support proper belt movement and help complete a treadmill repair.

This part is useful for:

\- Treadmill repair and maintenance  
\- Replacing a damaged rear idler roller  
\- Servicing a Precor M9.21i treadmill  
\- Matching a replacement component by the RP380 part number  
\- Repairing equipment before returning it to regular use

The product page does not provide dimensions, material information, color, bearing details, or installation instructions. Buyers should use the listed product identity and compatibility information when comparing this part with the roller currently installed on their treadmill.

## Compatibility and Applications

The RP380 is listed for the \*\*Precor M9.21i treadmill\*\*. It is a treadmill rear idler roller, not a front drive roller, motor, belt, deck, or complete roller assembly for an unspecified machine. Its intended application is the rear belt-support position on the compatible Precor treadmill model.

Use the model name and part number together when checking compatibility:

\- \*\*Brand:\*\* Precor  
\- \*\*Compatible equipment:\*\* Precor M9.21i treadmill  
\- \*\*Part name:\*\* Rear idler roller  
\- \*\*Product category:\*\* Treadmill roller  
\- \*\*Part number:\*\* RP380  
\- \*\*SKU:\*\* RP380  
\- \*\*Barcode:\*\* RP380

Because treadmill parts can vary by model revision or serial range, confirm that your equipment matches the Precor M9.21i designation before ordering.

\## Why Choose This Replacement Part

Choosing the correct rear idler roller helps you avoid ordering an unrelated treadmill roller or a front drive component. The RP380 identification gives repair technicians, equipment owners, and parts buyers a clear reference when searching for a replacement for a Precor M9.21i treadmill.

A correct model and part-number match can also make the purchasing process easier when replacing a roller during scheduled maintenance or equipment repair.

## Before You Buy

Check your treadmill’s brand, model, and existing rear roller before placing an order. Confirm that the machine is a \*\*Precor M9.21i\*\* and that \*\*RP380\*\* matches the required part reference. The product record also lists serial number \*\*2XA04M0025\*\* as a reference. Dimensions and construction details are not provided, so verify measurements or consult a qualified treadmill service professional if your equipment has been modified or carries a different serial reference.

## Details

- **Price:** 99.99 USD
- **Vendor:** Precor
- **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/precor-m9-21i-treadmill-rear-idler-roller-rp380)
> Updated: 2026-08-29