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Representative image of an RCScrewZ metal-shielded bearing kit for HPI Racing Micro RS4 1/18 Elec 4WD Touring/Drift (610, 619); exact bearing sizes and quantities vary by RC model.
Upgrade Your RC Car with Metal Shielded Bearings for HPI Micro RS4 1/18 4WD | hpi004b - 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 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 - hpi004b
Infographic: 'Choose Wisely for Off-Road Adventuring' – Recommends Rubber Sealed Bearings for maximum protection and enhanced off-road performance in RC vehicles - hpi004b
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 - hpi004b
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 - hpi004b
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 - hpi004b
RCScrewZ and J-M SUPPLIES offer high-quality RC bearing kits, available as metal shielded or rubber sealed options, suitable for diverse RC needs - hpi004b
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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 - hpi004b
Infographic reminder: Refer to the item description for more detailed information about the product - hpi004b
Infographic reminder: Refer to the item description for more detailed information about the product - hpi004b
Notice: Check the product description for detailed information on the specific bearing sizes included in this bearing kit - hpi004b

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 hpi004b for HPI Racing Micro RS4 1/18 Electric 4WD Belt-Drive Touring / Drift Car (#610, #619, #621, #635, #111230, #112468, #120101, MICRO-RS4) | SET

RCScrewZSKU: hpi004b

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

Fits: HPI Racing Micro RS4 1/18 Elec 4WD Touring/Drift (610, 619)
OEM / model: MICRO-RS4, MICRORS4, 610, 619, 621, 635, 111230, 112468, 120101

US
Regular price
$38.94
Sale price
$38.94
Regular price
$43.95

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
HPI Racing Micro RS4 1/18 Elec 4WD Touring/Drift (610, 619)
OEM / model number
MICRO-RS4, MICRORS4, 610, 619, 621, 635, 111230, 112468, 120101
Kit type
Metal-Shielded Bearing Kit — Low-Drag for Cleaner Running
Scale
1:18
Power
Electric
View all verified kits for this model →
More compatibility details
RC brand
HPI Racing
Vehicle class
Land
Kit SKU
hpi004b
Model series
Micro RS4
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:

  • 3x8x3mm bearings
  • 3x8x3.5mm thrust bearings
  • 5x8x2.5mm bearings
  • 5x11x4mm bearings
  • 6x10x3mm 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
HPI Racing Micro RS4 1/18 Elec 4WD Touring/Drift (610, 619)
Compatible RC Brand
HPI Racing
RC Vehicle OEM / Model Number(s)
111230, 112468, 120101, 610, 619, 621, 635, MICRO-RS4, MICRORS4
RCScrewZ Kit Part Number
hpi004b

Vehicle Compatibility Details

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

RC Vehicle OEM / Model Number(s)
111230, 112468, 120101, 610, 619, 621, 635, MICRO-RS4, MICRORS4
RC Chassis Compatibility
Micro RS4 touring / drift car
Compatible Vehicle Type
Drift Car
Terrain Compatibility
Compatible Scale
1:18
Compatible Fuel Type
Electric

What Is Included

Included bearing sizes for this Metal-Shielded Bearing Kit:

  • 3x8x3mm bearings
  • 3x8x3.5mm thrust bearings
  • 5x8x2.5mm bearings
  • 5x11x4mm bearings
  • 6x10x3mm 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

Compatibility Title: HPI Racing Micro RS4 1/18 Electric Drift Car Compatibility

Quick Fit Summary:

  • Compatible Brand: HPI Racing

  • Fit: Model-specific for the listed RC model/platform: Micro RS4

  • Compatible RC Model/OEM Numbers: MICRO-RS4, MICRORS4, 610, 619, 621, 635, 111230, 112468, 120101

  • Scale: 1/18

  • Power Source / Fuel Type: Electric

  • Battery / Cell Count: Not currently verified.

  • Drive Type: 4WD belt-drive

  • Vehicle Type: Drift Car

  • Chassis: Micro RS4 touring / drift car

  • Era: Not currently verified.

  • OEM / Models: MICRO-RS4, MICRORS4, 610, 619, 621, 635, 111230, 112468, 120101

  • RC Model Terrain: On-Road

This Kit Details:

  • SKU: hpi004b

  • MPN: hpi004b

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

  • Sealed Bearings: No

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

  • Product Material: Carbon Chrome Steel Bearings

  • Product Color: Silver

  • Bearing Sizes Included: 3x8x3mm bearings; 3x8x3.5mm thrust bearings; 5x8x2.5mm bearings; 5x11x4mm bearings; 6x10x3mm bearings

Release / Catalog Date: Not currently verified.

Product Benefits: This HPI bearings kit uses metal shielded, low-drag bearings for Micro RS4 maintenance and clean, dry, low-debris running. The bearings help reduce friction in drivetrain and rolling assemblies while the metal shields maintain reduced friction, low-drag performance for clean running conditions.

Fitment Note: Match each included bearing size to the removed factory bearing and confirm smooth rotation before final assembly.

OEM Alias Coverage: MICRO-RS4, MICRORS4, 610, 619, 621, 635, 111230, 112468, 120101

Terrain Compatibility: On-Road

Metal-Shielded Bearing Kit Details

Review the bearing-kit details below before ordering.

RCScrewZ Kit Part Number
hpi004b
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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Stainless Screw Kit

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Current price: $33.97 Compare-at price: $34.95 Save $0.98 In stock View Stainless Screw Kit

Rubber-Sealed Bearing Kit

For HPI Racing Micro RS4 1/18 Elec 4WD Touring/Drift (610, 619) OEM/model: MICRO-RS4, MICRORS4, 610, 619, 621, 635, 111230, 112468, 120101
Current price: $38.94 Compare-at price: $43.95 Save $5.01 In stock View Rubber-Sealed Kit
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Fits: HPI Racing Micro RS4 1/18 Elec 4WD Touring/Drift (610, 619)
$38.94