Would this work for the front suspension an a trek marlin 5?

Yes it works fine., but you can go to local MB shop and buy oil with same values cheaper.

Is this a good weight for the front of my trx4?

Is it recommended for it… no, it is recommended for use in bike front suspension forks, however I was looking at it for the same purpose. Rc use. Im gonna run it. Cheaper than rc brands by volume.

If I have air forks, do I need suspension fluid?

Yes, you absolutely need suspension fluid. An "air fork" has a sealed air chamber which functions as a "spring". When you the fork down, the air chamber compresses further and pushes back. It's pretty simple. This air chamber has rubber seals which use oil to lubricate the seals and prevent air from leaking. Also, there is typically a "damper" side to the folk (side of the fork which has adjustments for rebound, compression, etc.) which also requires oil. The charge damper should generally be left alone. It requires patience and finesse to properly change and bleed the oil. It would probably be worth taking your bike into a shop to have this done. Scratches to your fork could ruin it. It'd be cheaper to pay for service than pay for a new fork.

Need Help Guys, when I add the oil should how should my rebound and dampening be set??

I have RockShox Recon 2006. It did not matter how it was set when adding oil. There was no pressure. The dampener was a pain to get back together because of the oil needing to work it’s way around seals and such. But after quite a bit of twisting it got back into place. Adding oil to the lower chambers was simply adding oil to two tubes. No settings really mattered then either.

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RockShox Suspension Oil 15wt 120ml Bottle Lower Legs

Product ID: 1429772

Details

Brand
RockShox
Item Weight
113 Grams
Liquid Volume
120 Fluid
Material
Multi
Package Information
Pail

🔧100% RockShox compatibility

⚙️15wt viscosity for optimal damping

🛢️120ml precise volume for perfect service

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763171₫

Duties & taxes included

In stock

Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Brand
RockShox
Item Weight
113 Grams
Liquid Volume
120 Fluid

Description

🛠️ Elevate your ride with RockShox’s precision suspension oil — because every drop counts!

ROCK SHOX CERTIFIED - Specifically formulated for seamless integration with all RockShox forks and shocks
VISCOSITY STABILITY - Innovative formula maintains consistent performance across temperature changes
EFFORTLESS MAINTENANCE - Simplifies suspension servicing, keeping your ride buttery smooth and race-ready
PRECISION TUNED VISCOSITY - 15wt oil engineered for smooth, responsive suspension performance
PERFECT VOLUME FOR DIY SERVICE - 120ml bottle ensures you have just the right amount for lower leg maintenance

RockShox Suspension Oil 15wt in a 120ml bottle is a premium, viscosity-stable oil designed specifically for RockShox forks and shocks. It ensures optimal damping performance and easy maintenance, making it the go-to choice for riders who demand smooth, reliable suspension and hassle-free servicing.

Specifications

ASIN	B005543YIQ
Best Sellers Rank	#49,412 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #52 in Bike Tool Kits
Brand	RockShox
Brand Name	RockShox
Container Type	Bottle
Customer Reviews	4.7 out of 5 stars 1,240 Reviews
Global Trade Identification Number	00710845655197
Included Components	Suspension Oil and Lube
Item Form	Oil
Item Weight	113 Grams
Liquid Volume	120 Fluid Ounces
Manufacturer	RockShox
Material	Multi
Model Number	11.4315.021.040
Number of Items	1
Package Information	Bottle
Part Number	PS4315021040
Recommended Uses For Product	Suspension Oil
SAE J300 Viscosity Grade	15W
Specific Uses For Product	Suspension Oil and Lube
UPC	744288815450 710845655197
Unit Count	120 Milliliters
Warranty Description	Limited Warranty

Reviews

M**N

3.04.2025

S**K

6.03.2026

M**E

5.03.2024

A**Y

3.10.2025

H**R

4.09.2024

M**K

18.03.2025

A**N

31.05.2024

M**Y

19.01.2025

P**C

9.12.2020

F**A

22.08.2024

ナ**ツ

6.12.2025

G**S

19.03.2026

P**Y

31.05.2023

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