Medius X20 '21

Serpent Medius X20 '21 Setups

On-roadTouring/GT1/10 scale4WD

Shock Oil Conversion Chart

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Setups

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Ken Grace
Ken Grace
Serpent America
Park Lane Hobbies 21.5 TC
Track
Park Lane Hobbies
Indoor Carpet
High grip
Date
Nov 23, 2025
Mirco Thalheimer
Serpent
My Base Setup Asphalt
2
Track
Arena33 Andernach
Outdoor Asphalt
Medium grip
Date
Sep 8, 2021

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Kit setup

Kit shock setup (Low grip asphalt). Part numbers link to AMain.

Shock oil
Front
400 cst
Rear
400 cst
Serpent oil
Springs
Front
Yellow 2.6 #401853
Rear
Yellow 2.6 #401853
Pistons
Front
4 hole #401841
Rear
4 hole #401841
Diff fluid
Rear
7,000 cst

What shock oil does the Serpent Medius X20 '21 come with?

Out of the box the Medius X20 '21 runs 400 cst front, 400 cst rear (Serpent oil), on 4 hole (#401841) front, 4 hole (#401841) rear pistons. That is the kit setup; you will need to adjust it for your track conditions. The RC Setup App can help dial it in.

What springs does the Serpent Medius X20 '21 come with?

The kit springs are Yellow 2.6 (#401853) front, Yellow 2.6 (#401853) rear. Stiffer springs suit high grip and big jumps; softer springs add grip on slick or bumpy tracks.

What diff fluid does the Serpent Medius X20 '21 come with?

The kit diff fluid is 7,000 cst rear. Thicker front adds steering on power; thicker center sends more drive rearward; thicker rear stabilizes the car under throttle.

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