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Representative image of an RCScrewZ metal-shielded bearing kit for ARRMA KRATON 8S EXB 1/5 Electric 4WD MT Roller (ARA5208); exact bearing sizes and quantities vary by RC model.
Upgrade Your RC Car with Metal Shielded Bearings for ARRMA KRATON 8S EXB | ara040b - High Performance Upgrade | Durable & Reliable - by J-M SUPPLIES
Infographic: 'Choose Wisely for Your Need for Speed' – Highlights Metal Shielded Bearings as the top choice for unbeatable on-road RC car performance -
Infographic: 'Choose Wisely for Off-Road Adventuring' – Recommends Rubber Sealed Bearings for maximum protection and enhanced off-road performance in RC vehicles -
Infographic: 'Choose Wisely for Your Need for Speed' – Highlights Metal Shielded Bearings as the top choice for unbeatable on-road RC car performance - ara040b
Infographic: 'Choose Wisely for Off-Road Adventuring' – Recommends Rubber Sealed Bearings for maximum protection and enhanced off-road performance in RC vehicles - ara040b
Infographic: 'What Matters Most to You? Performance on the Streets or Durability in the Dirt?' – Guides on selecting bearings to match your RC lifestyle, highlighting the importance of choosing based on whether your focus is speed on paved roads or resilience in off-road conditions - ara040b
Infographic: 'Need Bearings? How to Check Your RC's Bearings for Replacement' – Instructions to remove, clean, and inspect bearings for gritty texture or improper movement, indicating the need for replacement - ara040b
Step-by-Step Guide: Checking RC Bearings. 2. Assess if bearings feel gritty or aren't spinning freely. 3. Non-free spinning bearings impair RC performance. 4. Bearings not spinning freely may need replacement - ara040b
RCScrewZ and J-M SUPPLIES offer high-quality RC bearing kits, available as metal shielded or rubber sealed options, suitable for diverse RC needs - ara040b
Elevate Your RC Adventure! Image introducing Stainless Screw Kits as the Ultimate Upgrade. Offers enhanced durability, superior corrosion resistance, and a sleek look, making them a top choice for complementing high-quality bearing selections. Trusted by RC enthusiasts worldwide - ara040b
Infographic on RCScrewZ Bearing Kits: Highlights features of both metal and rubber shielded bearing kits, detailing high-quality components suitable for various RC models. Covers standard, flanged, one-way, and thrust bearings included in kits, with extra spares. Explains the shielding and performance benefits of each type, tailored for specific RC model needs - ara040b
Infographic reminder: Refer to the item description for more detailed information about the product - ara040b
Infographic reminder: Refer to the item description for more detailed information about the product - ara040b
Notice: Check the product description for detailed information on the specific bearing sizes included in this bearing kit - ara040b

Why Choose This Kit

Key features and intended use for this kit.

Shield type

Metal-Shielded (On-Road)

Performance focus

Low-drag, not sealed

Best suited for

Cleaner on-road / prepared surfaces

Metal-Shielded Bearings

RCScrewZ Metal Shielded Bearing Kit ara040b for ARRMA Kraton 8S EXB 1/5 Electric 4WD Brushless Speed Monster Truck Roller (ARA5208, 5208) | SET

(1)
RCScrewZSKU: ara040b

Model-specific metal-shielded bearings for smooth, low-drag operation on cleaner on-road or prepared surfaces.

Fits: ARRMA KRATON 8S EXB 1/5 Electric 4WD MT Roller (ARA5208)
OEM / model: ARA5208, 5208

US
Regular price
$53.67
Sale price
$53.67
Regular price
$59.95

In stock

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Confirm this kit fits your RCMatch the RC model and OEM/model number shown above to your vehicle.

Exact model check

Confirm This Fits Your RC

Match the RC model and OEM/model number below before ordering.

RC model
ARRMA KRATON 8S EXB 1/5 Electric 4WD MT Roller (ARA5208)
OEM / model number
ARA5208, 5208
Kit type
Metal-Shielded Bearing Kit — Low-Drag for Cleaner Running
Scale
1:5
Power
Electric
View all verified kits for this model →
More compatibility details
RC brand
Arrma
Vehicle class
Land
Kit SKU
ara040b
Model series
KRATON, KRATON 8S, KRATON EXB, 8S, Extreme Bash, Roller
Product information

Everything You Need Before Ordering

Review what is included, installation notes, shipping details, and complete kit information.

Kit Contents & Installation

What’s Included Model-specific bearing set with one spare of each included size.
  • All bearing sizes listed below for this model-specific kit
  • One spare of each included size
  • Bearing styles vary by RC model and may include standard, flanged, one-way, or thrust bearings

Included bearing sizes for this kit:

    • 5x11x4mm bearings
    • 6x10x3mm bearings
    • 8x16x5mm bearings
    • 8x19x6mm bearings
    • 15x21x4mm bearings
Installation & Model NotesImportant instructions and model-specific guidance.

Seat bearings fully and squarely. Do not force them into the housing or overtighten the hardware that retains them.

Keep metal-shielded bearings clean and dry.

After cleaning and drying, apply a small amount of light bearing oil.

Details & Support

Kit Details Lower-drag metal shields for clean, dry running conditions.
Shield Type
Metal-Shielded Bearings
Performance Priority
Lower drag
Protection
Not sealed; best kept clean and dry
Best For
Cleaner on-road or prepared surfaces when lower drag is the priority
Not Ideal For
Dust, dirt, sand, mud, water, or frequent wet-condition use
Prefer Rubber-Sealed?
Choose Rubber-Sealed bearings for off-road use, dust, dirt, sand, mud, water exposure, or lower-maintenance protection.
Shipping & Returns Handling time, current delivery estimate, and return policy.
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

Full Product Description Read the complete product specifications and details.

Exact RC Model Fitment

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

Compatible RC Model
ARRMA KRATON 8S EXB 1/5 Electric 4WD MT Roller (ARA5208)
Compatible RC Brand
Arrma
RC Vehicle OEM / Model Number(s)
ARA5208, 5208
RCScrewZ Kit Part Number
ara040b

Vehicle Compatibility Details

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

RC Vehicle OEM / Model Number(s)
ARA5208, 5208
RC Chassis Compatibility
ARRMA KRATON 8S EXB Roller (ARA5208)
Compatible Vehicle Type
1/5 Electric 4WD Monster Truck Roller
Terrain Compatibility
Compatible Scale
1:5
Compatible Fuel Type
Electric

What Is Included

Included bearing sizes for this Metal-Shielded Bearing Kit:

    • 5x11x4mm bearings
    • 6x10x3mm bearings
    • 8x16x5mm bearings
    • 8x19x6mm bearings
    • 15x21x4mm bearings

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:

Quick Fit Summary:

  • Compatible Brand: ARRMA

  • Fit: Model-specific fitment for ARRMA KRATON 8S EXB Roller

  • Compatible RC Model/OEM Numbers: ARA5208, 5208

  • Scale: 1/5

  • Power Source / Fuel Type: Electric

  • Battery / Cell Count: Dual 4S LiPo / 8S setup

  • Drive Type: 4WD

  • Vehicle Type: Monster Truck Roller

  • Chassis: ARRMA KRATON 8S EXB Roller (ARA5208)

  • Era: Next Gen Era (2020-Present)

  • OEM / Models: ARA5208, 5208

  • RC Model Terrain: Off-Road: Extreme Bash, Dirt, Grass & Gravel

This Kit Details:

  • SKU: ara040b

  • MPN: ara040b

  • Kit Type: Metal Shielded Bearing Kit

  • Bearing Type: Metal-Shielded (On-Road / Low-Drag)

  • Sealed Bearings: No

  • Water/Dust Protection: Low-drag, not sealed

  • Product Material: Carbon Chrome Steel Bearings

  • Product Color: Silver

Bearing Size Details:

  • 5x11x4mm bearings
  • 6x10x3mm bearings
  • 8x16x5mm bearings
  • 8x19x6mm bearings
  • 15x21x4mm bearings

OEM / Model Code / Alias Coverage:

  • ARA5208
  • 5208

Model Family Coverage:

  • KRATON
  • KRATON 8S
  • KRATON EXB
  • 8S
  • Extreme Bash
  • Roller

Release / Date Evidence: Model Production Year: 2021. Catalog era mapped to Next Gen Era (2020-Present).

Product Benefits: Metal shielded bearings are a lower-drag choice for clean, dry, low-debris running, race prep, street-bash builds, bench rebuilds, and display builds.

Fitment Note: Confirm your ARRMA model number matches ARA5208 or listed alias codes before ordering. Metal shielded bearings are not sealed for dirt, dust, mud, or debris protection; choose rubber shielded bearings when contamination protection matters more.

Search-Friendly Notes: Compatible ARRMA KRATON 8S EXB Roller ARA5208 metal shielded bearing kit for builders, bashers, racers, and maintenance-focused RC owners.

Metal-Shielded Bearing Kit Details

Review the bearing-kit details below before ordering.

RCScrewZ Kit Part Number
ara040b
Product Brand
RCScrewZ
Shielding Type
Metal-Shielded (On-Road)
Sealed Bearing Status
No
Bearing Material
Carbon Chrome Bearings
Approximate Piece Count
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.

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Rubber-Sealed Bearing Kit

For ARRMA KRATON 8S EXB 1/5 Electric 4WD MT Roller (ARA5208) OEM/model: ARA5208, 5208
Current price: $53.67 Compare-at price: $59.95 Save $6.28 In stock View Rubber-Sealed Kit
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Fits: ARRMA KRATON 8S EXB 1/5 Electric 4WD MT Roller (ARA5208)
$53.67