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Representative image of an RCScrewZ metal-shielded bearing kit for Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028); exact bearing sizes and quantities vary by RC model.

RCScrewZ Metal Shielded Bearing Kit los120b for Losi Lasernut U4 2.2 RTR Brushless 1/10 Electric 4WD Rock Racer Desert Buggy (LOS03028) | RCX

RCScrewZ

SKU: los120b

Regular price
$53.67
Sale price
$53.67
Regular price
$59.95
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Available Quantity: 99

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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:

Losi Lasernut U4 2.2 1/10 4WD RTR Rock Racer (LOS03028) — Compatible Kits by RCScrewZ (Screws & Bearings)

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: Losi
  • RC Model: Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028)
  • Scale: 1:10
  • Power Source / Fuel Type: Electric
  • Chassis: Losi Lasernut U4 Tenacity 4WD Rock Racer
  • Era: Next Gen Era (2020–Present)
  • OEM / Models: LOS03028
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: Team Losi
  • Fit: Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028)
  • Compatible RC Model Numbers: LOS03028
  • Scale: 1:10
  • Power Source / Fuel Type: Electric
  • Vehicle Type: 1/10 Electric 4WD Rock Racer Desert Buggy
  • Chassis: Losi Lasernut U4 Tenacity 4WD Rock Racer
  • Era: Next Gen Era (2020–Present)
  • RC Model Terrain: Off-Road: Rock, Desert, Dirt & Gravel

This Kit Details

  • SKU: los120b
  • MPN: los120b
  • Product: Track Racing Bearing Upgrade Kit
  • Bearing Type: Metal-Shielded (On-Road)
  • Sealed Bearings: No
  • Water/Dust Protection: Low-drag, not sealed
  • Product Material: Carbon Chrome Bearings
  • Product Color: Silver
  • Bearing Sizes Included: 5x8x2.5mm bearings · 5x11x4mm bearings · 6x12x4mm bearings · 10x15x4mm bearings · 12x18x4mm bearings
  • Tips: Seat fully · Do not over-tighten · After cleaning: add light oil
  • 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
Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028)
Compatible RC Brand
Losi
RC Vehicle OEM / Model Number(s)
LOS03028
RCScrewZ Kit Part Number
los120b

Vehicle Compatibility Details

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

RC Vehicle OEM / Model Number(s)
LOS03028
RC Chassis Compatibility
Losi Lasernut U4 Tenacity 4WD Rock Racer
Compatible Vehicle Type
1/10 Electric 4WD Rock Racer Desert Buggy
Terrain Compatibility
Compatible Scale
1:10
Compatible Fuel Type
Electric

What Is Included

Included bearing sizes for this Metal-Shielded Bearing Kit:

  • 5x8x2.5mm bearings
  • 5x11x4mm bearings
  • 6x12x4mm bearings
  • 10x15x4mm bearings
  • 12x18x4mm 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: Losi

  • Fit: Model-specific fitment for Losi Lasernut U4 2.2 RTR Brushless

  • Compatible RC Model/OEM Numbers: LOS03028

  • Scale: 1/10

  • Power Source / Fuel Type: Electric

  • Battery / Cell Count: 4S

  • Drive Type: 4WD

  • Vehicle Type: Rock Racer / Desert Buggy

  • Chassis: Losi Lasernut U4 Tenacity 4WD Rock Racer

  • Era: Next Gen Era (2020–Present)

  • OEM / Models: LOS03028

  • RC Model Terrain: Off-Road: Rock, Desert, Dirt & Gravel

This Kit Details:

  • SKU: los120b

  • MPN: los120b

  • 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:

  • 5x8x2.5mm bearings
  • 5x11x4mm bearings
  • 6x12x4mm bearings
  • 10x15x4mm bearings
  • 12x18x4mm bearings

OEM / Model Code / Alias Coverage:

  • Verified OEM / model codes: LOS03028

  • Series / search aliases: Lasernut, Lasernut U4, Tenacity, U4 Rock Racer

Model Family Coverage:

Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028)

Product Benefits:

Metal shielded bearings are best for clean, dry, low-debris running, bench rebuilds, display builds, and racers who prefer reduced friction and a lower-drag drivetrain feel.

Fitment Note:

Confirm your RC model and OEM number before ordering. This kit is matched to Losi Lasernut U4 2.2 RTR Brushless and the listed OEM/model codes.

Search-Friendly Notes:

Compatible Losi and TLR parts support for Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028); useful for RC screw kit, RC bearing kit, rebuild, upgrade, race prep, and maintenance searches.

Metal-Shielded Bearing Kit Details

Review the bearing-kit details below before ordering.

RCScrewZ Kit Part Number
los120b
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.

Fits: Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028)
$53.67

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