---
product_id: 48520257
title: "Rock Shox 11.4315.021.040 15WT Suspension Oil - 120 ml, Grey | bike-oils"
brand: "rock shox"
price: "$26.07"
currency: USD
in_stock: true
reviews_count: 13
category: "Rockshox"
url: https://www.desertcart.us/products/48520257-rock-shox-11-4315-021-040-15wt-suspension-oil-120
store_origin: US
region: United States of America
---

# 15WT viscosity for optimal suspension performance 120 ml precision bottle for easy application Specifically engineered for RockShox forks Rock Shox 11.4315.021.040 15WT Suspension Oil - 120 ml, Grey | bike-oils

**Brand:** rock shox
**Price:** $26.07
**Availability:** ✅ In Stock

## Summary

> ⚙️ Elevate your ride with RockShox’s precision suspension oil – because every trail deserves perfection.

## Quick Answers

- **What is this?** Rock Shox 11.4315.021.040 15WT Suspension Oil - 120 ml, Grey | bike-oils by rock shox
- **How much does it cost?** $26.07 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/48520257-rock-shox-11-4315-021-040-15wt-suspension-oil-120)

## Best For

- rock shox enthusiasts

## Why This Product

- Trusted rock shox brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact 120 ml Bottle:** Perfectly sized for on-the-go maintenance without bulk or waste.
- • **Long-Lasting Protection:** Formulated to maintain fork integrity and reduce wear over time.
- • **RockShox Certified Quality:** Official OEM oil trusted by pros for peak suspension performance.
- • **Precision-Tuned Suspension Oil:** 15WT viscosity ensures smooth, responsive fork action for every trail.
- • **Easy Application & Compatibility:** Works seamlessly with front suspension forks; backed by detailed manuals and service videos.

## Overview

RockShox 15WT Suspension Oil (120 ml) is a premium, OEM-certified lubricant designed specifically for front suspension forks. Its 15 weight viscosity optimizes fork responsiveness and durability, packaged in a convenient bottle for precise application. Trusted by cycling professionals and backed by manufacturer support, it ensures your suspension performs at its best on every ride.

## Description

From the manufacturer RockShox 15WT Suspension Oil - 120 ml - Available in 2.5, 5, 10, and 15 wt for front suspension - Available in 3 and 7 wt for rear suspension - 1L bottle or 120 ml bottle options - Refer to the RockShox Technical Manuals and Service Videos for correct applications

Review: On time - Quality stuff
Review: Good official product - Cheapest I could find, I bought for rockshox forks so can’t go wrong

## Features

- Harmful to aquatic life with long lasting effects.
- Toxic to aquatic life with long lasting effects.
- SUS OIL 15WT 120ML NEW

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B005543YIQ |
| Best Sellers Rank | 43,400 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 77 in Bike Oils 2,942 in Bike Components & Parts |
| Brand | Rock Shox |
| Brand Name | Rock Shox |
| Container Type | Bottle |
| Customer Reviews | 4.7 out of 5 stars 1,243 Reviews |
| Global Trade Identification Number | 00710845655197 |
| Included Components | Suspension Oil and Lube |
| Item Form | Oil |
| Item Type Name | SUS OIL 15WT 120ML NEW |
| Liquid Volume | 120 Millilitres |
| Liquid volume | 120 Millilitres |
| Manufacturer | ROCKSHOX |
| Material | Plastic |
| Model Number | 11.4315.021.040 |
| Number of Items | 1 |
| Package information | Bottle |
| Part Number | PS4315021040 |
| Product Warranty | 2 year manufacturer |
| Recommended Uses For Product | Suspension Oil |
| Recommended uses for product | Suspension Oil |
| SAE J300 Viscosity Grade | 15W |
| Specific Uses For Product | cycling |
| UPC | 744288815450 710845655197 |
| Unit Count | 120.0 millilitre |
| Viscosity | 15 |

## Product Details

- **Brand:** Rock Shox
- **Item weight:** 113 Grams
- **Liquid volume:** 120 Fluid Ounces
- **Material:** Plastic
- **Package information:** Bottle

## Images

![Rock Shox 11.4315.021.040 15WT Suspension Oil - 120 ml, Grey | bike-oils - Image 1](https://m.media-amazon.com/images/I/51MLdPY6LhL.jpg)

## Questions & Answers

**Q: Can this be used on a rockshox monarch debonair?**
A: I don't think so, page 33 of the SRAM service guide states you can use 15W oil around the top of the air can as a lubricant, but recommends using 3WT or 7WT in the service. Perhaps ask the guys at TF Tuned, they're normally very knowledgeable and get back to pretty quickly. http://www.tftuned.com/contact-us

## Customer Reviews

### ⭐⭐⭐⭐⭐ On time
*by D***E on 17 February 2026*

Quality stuff

### ⭐⭐⭐⭐⭐ Good official product
*by A***Y on 30 June 2025*

Cheapest I could find, I bought for rockshox forks so can’t go wrong

### ⭐⭐⭐⭐⭐ It's oily - it does what it's supposed to perfectly
*by S***E on 25 June 2025*

I actually got this as an alternative to forkboost for lubing the stanchions on my cheap air fork. For this purpose I'd get a lighter weight oil next time but for what this is and the price of it I can't complain. I would imagine it's perfect for it's intended purpose of going inside the fork instead of external lubing like I'm using it. 5/5 good quality suspension oil - maybe get something lighter or less viscous for oiling stanchions

## Frequently Bought Together

- RockShox Suspension Oil 15wt 120ml Bottle Lower Legs
- SRAM Butter Grease, 1 oz
- RockShox Suspension Oil, 5wt, 120ml Bottle, Fork Damper

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-14*