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Representative image of an RCScrewZ metal-shielded bearing kit for Serpent Medius X20 RTR EP 1/10 Touring Car (#400039); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Serpent Medius X20 RTR EP 1/10 Touring Car (#400039); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Serpent Medius X20 RTR EP 1/10 Touring Car (#400039); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Serpent Medius X20 RTR EP 1/10 Touring Car (#400039); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Serpent Medius X20 RTR EP 1/10 Touring Car (#400039); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Serpent Medius X20 RTR EP 1/10 Touring Car (#400039); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Serpent Medius X20 RTR EP 1/10 Touring Car (#400039); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Serpent Medius X20 RTR EP 1/10 Touring Car (#400039); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Serpent Medius X20 RTR EP 1/10 Touring Car (#400039); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Serpent Medius X20 RTR EP 1/10 Touring Car (#400039); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Serpent Medius X20 RTR EP 1/10 Touring Car (#400039); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Serpent Medius X20 RTR EP 1/10 Touring Car (#400039); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Serpent Medius X20 RTR EP 1/10 Touring Car (#400039); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Serpent Medius X20 RTR EP 1/10 Touring Car (#400039); exact bearing sizes and quantities vary by RC model.

RCScrewZ Metal Shielded Bearings ser107b for Serpent Medius X20 RTR EP 1/10 Touring Car (#400039) | RCX

RCScrewZ

SKU: ser107b

Regular price
$53.67
Sale price
$53.67
Regular price
$59.95
Shipping, stock & payment info
Quick snapshot of availability, estimated delivery, and our shipping/returns.

Available Quantity: 100

Free shipping on all U.S. orders (USPS Priority Mail).
Ships within 1–2 business days (Mon–Fri); some Saturday shipments by 12:00 PM ET.
Most orders ship from Canton, MI 48187. APO/FPO/DPO & PO Boxes welcome.
Priority Mail typically delivers in 2–3 business days (estimates; not guaranteed).
Easy 30-day returns with prepaid USPS label; refunds issued within 3 business days after the return is received.

Over 99% positive over ~14,000 orders on eBay (last 12 months) — as of October 2025. View on eBay

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This page shows the Metal-Shielded Bearing Kit for this RC model — view all compatible Screw and Bearing kits for this RC model by clicking this link:

Serpent Medius X20 RTR EP 1/10 Touring Car (#400039) — Find Compatible Stainless Screw & Bearing Kits

Pro tip: Most builders grab a Stainless Screw Kit and a Bearing Kit for this RC model so everything wears evenly.

Quick Fit Summary
  • Compatible Brand: Serpent
  • RC Model: Serpent Medius X20 RTR EP 1/10 Touring Car (#400039)
  • Scale: 1:10
  • Power Source / Fuel Type: Electric
  • Chassis: Serpent Medius X20 RTR Touring Chassis (#400039)
  • Era: Next Gen Era (2020–Present)
  • OEM / Models: 400039, SER400039, SER400039-O, SER400039-R, SER400039-G, SER400039-B
Quick Fit Summary — Full Details

Quick Fit Summary

Key fit details for your RC model, plus what’s in this kit.

RC Model Fit & Specs

  • Compatible Brand: Serpent
  • Fit: Serpent Medius X20 RTR EP 1/10 Touring Car (#400039)
  • Compatible RC Model Numbers: 400039 · SER400039 · SER400039-O · SER400039-R · SER400039-G · SER400039-B
  • Scale: 1:10
  • Power Source / Fuel Type: Electric
  • Vehicle Type: 1/10 Electric On-Road Touring Car
  • Chassis: Serpent Medius X20 RTR Touring Chassis (#400039)
  • Era: Next Gen Era (2020–Present)
  • RC Model Terrain: On-Road: Indoor Carpet & Smooth Asphalt

This Kit Details

  • SKU: ser107b
  • MPN: ser107b
  • Product: RC Speed Bearing Kit
  • Bearing Type: Metal-Shielded (On-Road)
  • Sealed Bearings: No
  • Water/Dust Protection: Low-drag, not sealed
  • Product Material: Carbon Chrome Steel
  • Product Color: Silver
  • Bearing Sizes Included: Note: The specific bearing sizes will be listed soon. In the meantime · please contact us for detailed information about the sizes included in this kit. We're happy to assist you!
  • Install: ≈60 min; recheck torque after first run
  • Country of Origin: United States
Full Product Description

Exact RC Model Fitment

Confirm the exact RC model and RC vehicle OEM/model number below before ordering.

Compatible RC Model
Serpent Medius X20 RTR EP 1/10 Touring Car (#400039)
Compatible RC Brand
Serpent
RC Vehicle OEM / Model Number(s)
RCScrewZ Kit Part Number
ser107b

Vehicle Compatibility Details

Review these vehicle details to help confirm compatibility with your RC model.

RC Vehicle OEM / Model Number(s)
RC Chassis Compatibility
Serpent Medius X20 RTR Touring Chassis (#400039)
Compatible Vehicle Type
1/10 Electric On-Road Touring Car
Terrain Compatibility
On-road
Compatible Scale
1:10
Compatible Fuel Type
Electric

What Is Included

Included bearing sizes for this Metal-Shielded Bearing Kit:

    Note: The specific bearing sizes will be listed soon. In the meantime, please contact us for detailed information about the sizes included in this kit. We're happy to assist you!

What Is Not Included

Only the bearings identified in the included-bearing-size list are part of this kit. 

The RC vehicle and separately sold parts are not included unless specifically listed.

Installation & Model Notes

Metal Shielded Bearing Kit Compatibility (On-Road):

  • Model: Serpent Medius X20 RTR EP 1/10 Touring Car

  • OEM / Part #: 400039 (SER400039 family)

  • Scale: 1/10 (190mm touring)

  • Fuel Type: Electric (EP) | Battery: 2S LiPo recommended

  • Vehicle Type: On-Road Touring Car (RTR)

  • Chassis: Medius X20 RTR touring chassis (4WD belt drive)

  • Terrain: On-Road carpet & smooth asphalt

  • Release Date: 2024

Benefits:

  • Low-drag performance for clean on-road conditions—great for carpet touring and smooth asphalt.

  • Helps maintain efficient drivetrain feel on belt-drive touring platforms.

Chatter Counter:

  • Owner reviews mention the stock RTR steering servo feels slow—common upgrade is a faster metal-gear servo for sharper turn-in.

Install Tips:

  • Press bearings in square and fully seated—avoid side-loading.

  • Add a tiny drop of light bearing oil after cleaning for best free-spin.

Metal-Shielded Bearing Kit Details

Review the bearing-kit details below before ordering.

RCScrewZ Kit Part Number
ser107b
Product Brand
RCScrewZ
Shielding Type
Metal-Shielded (On-Road)
Sealed Bearing Status
No
Bearing Material
Carbon Chrome Steel
Approximate Piece Count
Piece count information will be available shortly.
Color
Silver

Before Ordering

  • Confirm your exact RC model, RC brand, and OEM/model number whenever possible.
  • Review the included-bearing-size list before purchase.
  • Read the installation and model notes before disassembly or installation.

Vehicle versions, chassis revisions, and model-year configurations can differ. 

Confirm fitment before purchase when your RC vehicle differs from the details shown above.

Fits: Serpent Medius X20 RTR EP 1/10 Touring Car (#400039)
$53.67
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