SAVE
$6.28
Representative image of an RCScrewZ metal-shielded bearing kit for Kyosho Turbo Optima Gold 1/10 Electric 4WD Buggy (30619); exact bearing sizes and quantities vary by RC model.
Upgrade Your RC Car with Metal Shielded Bearings for Kyosho Turbo Optima Gold | kyo186b - 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 - kyo186b
Infographic: 'Choose Wisely for Off-Road Adventuring' – Recommends Rubber Sealed Bearings for maximum protection and enhanced off-road performance in RC vehicles - kyo186b
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 - kyo186b
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 - kyo186b
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 - kyo186b
RCScrewZ and J-M SUPPLIES offer high-quality RC bearing kits, available as metal shielded or rubber sealed options, suitable for diverse RC needs - kyo186b
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 - kyo186b
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 - kyo186b
Infographic reminder: Refer to the item description for more detailed information about the product - kyo186b
Infographic reminder: Refer to the item description for more detailed information about the product - kyo186b
Notice: Check the product description for detailed information on the specific bearing sizes included in this bearing kit - kyo186b

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 kyo186b for Kyosho Turbo Optima Gold 1/10 Electric 4WD Off-Road Racing Buggy (30619) | SET

RCScrewZSKU: kyo186b

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

Fits: Kyosho Turbo Optima Gold 1/10 Electric 4WD Buggy (30619)
OEM / model: 30619

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

In stock

View Cart

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
Kyosho Turbo Optima Gold 1/10 Electric 4WD Buggy (30619)
OEM / model number
30619
Kit type
Metal-Shielded Bearing Kit — Low-Drag for Cleaner Running
Scale
1:10
Power
Electric
View all verified kits for this model →
More compatibility details
RC brand
Kyosho
Vehicle class
Land
Kit SKU
kyo186b
Model series
Optima, Turbo Optima, Turbo Optima Gold, Legendary Series
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:

    • 3x6x2.5mm bearings
    • 4x8x3mm flanged bearings
    • 5x10x4mm bearings
    • 10x15x4mm 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
Kyosho Turbo Optima Gold 1/10 Electric 4WD Buggy (30619)
Compatible RC Brand
Kyosho
RC Vehicle OEM / Model Number(s)
30619
RCScrewZ Kit Part Number
kyo186b

Vehicle Compatibility Details

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

RC Vehicle OEM / Model Number(s)
30619
RC Chassis Compatibility
Kyosho Turbo Optima Gold 4WD Buggy Chassis (30619)
Compatible Vehicle Type
1/10 Electric 4WD Off-Road Racing Buggy
Terrain Compatibility
Compatible Scale
1:10
Compatible Fuel Type
Electric

What Is Included

Included bearing sizes for this Metal-Shielded Bearing Kit:

    • 3x6x2.5mm bearings
    • 4x8x3mm flanged bearings
    • 5x10x4mm bearings
    • 10x15x4mm 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: Kyosho

  • Fit: Model-specific fitment for Kyosho Turbo Optima Gold, OEM model 30619.

  • Compatible RC Model/OEM Numbers: 30619

  • Scale: 1/10

  • Power Source / Fuel Type: Electric

  • Battery / Cell Count: Not currently verified

  • Drive Type: 4WD

  • Vehicle Type: Off-Road Racing Buggy

  • Chassis: Kyosho Turbo Optima Gold 4WD Buggy Chassis (30619)

  • Era: Next Gen Era (2020–Present)

  • OEM / Models: 30619

  • RC Model Terrain: Off-Road: Dirt, Clay & Vintage Tracks

This Kit Details:

  • SKU: kyo186b

  • MPN: kyo186b

  • 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:

  • 3x6x2.5mm bearings
  • 4x8x3mm flanged bearings
  • 5x10x4mm bearings
  • 10x15x4mm bearings

OEM / Model Code / Alias Coverage: 30619

Model Family Coverage: Optima, Turbo Optima, Turbo Optima Gold, Legendary Series

Retail Availability Date: 2024 Reference

Product Benefits:

  • Metal shielded bearings are best for cleaner running, display builds, light-duty use, or buyers who prefer lower rolling resistance.
  • Helps reduce friction for smoother drivetrain performance on clean surfaces.

Fitment Note: Confirm your Kyosho OEM/model number matches 30619 before ordering. This is a model-specific RCScrewZ kit, not a generic assortment.

Search-Friendly Notes: Compatible with Kyosho Turbo Optima Gold 1/10 Electric 4WD Buggy (30619) for Kyosho RC rebuilds, repairs, maintenance, and upgrades.

Metal-Shielded Bearing Kit Details

Review the bearing-kit details below before ordering.

RCScrewZ Kit Part Number
kyo186b
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.

Share This Kit

Know another RC owner who could use this kit? Send them this exact product page.

More ways to share:

Customer Reviews

Same-model kit options

More Verified Kits for This RC Model

These kits are verified for the same exact RC model and OEM/model number.

Stainless Screw Kit

For Kyosho Turbo Optima Gold 1/10 Electric 4WD Buggy (30619) OEM/model: 30619
Current price: $33.97 Compare-at price: $34.95 Save $0.98 In stock View Stainless Screw Kit

Rubber-Sealed Bearing Kit

For Kyosho Turbo Optima Gold 1/10 Electric 4WD Buggy (30619) OEM/model: 30619
Current price: $53.67 Compare-at price: $59.95 Save $6.28 In stock View Rubber-Sealed Kit
Next step

Continue Shopping by RC Model

Shop More Parts for This RC Model View all verified kits for this exact model Find Parts for a Different RC Model Search by brand and model in the Compatibility Hub
Fits: Kyosho Turbo Optima Gold 1/10 Electric 4WD Buggy (30619)
$53.67