Compatible RC Parts for: Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028)

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

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Compatibility is verified using the exact model information shown here.

Verified Model Information

Brand
Losi
Exact model
Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028)
OEM model
LOS03028
Scale
1:10
Power/fuel type
Electric
Vehicle type
1/10 Electric 4WD Rock Racer Desert Buggy
Chassis/platform
Losi Lasernut U4 Tenacity 4WD Rock Racer
Terrain
Off-Road: Rock, Desert, Dirt & Gravel
Production era
Next Gen Era (2020–Present)

Pick Your Compatible Kit

Choose from the verified kit options available for this exact model:

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

STAINLESS RCScrewZ Stainless Steel Screw Kit los120 for Losi Lasernut U4 2.2 RTR Brushless 1/10 Electric 4WD Rock Racer Desert Buggy (LOS03028) | SET

Stainless Screw Kit

RCScrewZ Stainless Screw Kit

SKU: los120

Corrosion-resistant model-specific replacement hardware.

Choose this kit when you want stainless replacement screws for this exact model.

Pieces in kit: 320+ Pieces

Verified fit for:

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

OEM model: LOS03028

$43.95$38.94

Available

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RUBBER RCScrewZ Rubber Shielded Bearing Kit los120r for Losi Lasernut U4 2.2 RTR Brushless 1/10 Electric 4WD Rock Racer Desert Buggy (LOS03028) | SET

Rubber-Sealed Bearing Kit

RCScrewZ Rubber-Sealed Bearing Kit

SKU: los120r

Sealed protection against dirt, dust, and debris.

Choose this kit for rougher running conditions where sealed bearings are the priority.

Verified fit for:

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

OEM model: LOS03028

$59.95$53.67

Available

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

Metal-Shielded Bearing Kit

RCScrewZ Metal-Shielded Bearing Kit

SKU: los120b

Preferred for cleaner conditions and lower-drag priorities.

Choose this kit for cleaner running conditions and lower-drag priorities.

Verified fit for:

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

OEM model: LOS03028

$59.95$53.67

Available

View Kit Details

BEARING KIT GUIDE

Which bearing kit should I choose?

Compare the two verified bearing-kit options for this exact RC model.

Rubber-sealed bearing shown beside a metal-shielded bearing for visual comparison.
Representative illustration. Styles, sizes and quantities vary by kit.

Confirm the OEM/model number shown above before choosing a kit.

All Compatible Products

The listings below show the same verified kit roles with current pricing and links to full product details.

Explore Other Losi Models

These links open other exact Losi Model Collections. Confirm your vehicle’s model or OEM number before choosing a kit.

MODEL-SPECIFIC FAQ

Frequently Asked Questions

Questions and answers for Losi Lasernut U4 2.2 1/10 Electric 4WD Rock Racer (LOS03028) — Find Compatible Stainless Screw & Bearing Kits.

How do I know these kits fit my Losi Lasernut U4 2.2 1/10 4WD RTR Rock Racer (LOS03028)?
Each kit on this page is made specifically for the Losi Lasernut U4 2.2 1/10 4WD RTR Rock Racer (LOS03028). We cross-check scale, chassis layout and hardware locations against the factory manual so you get the right stainless screws and bearings for this exact RC model—no measuring or guessing.
What's included in the stainless screw kit for Losi Lasernut U4 2.2 1/10 4WD RTR Rock Racer (LOS03028)?
Every RCScrewZ stainless steel screw kit for Losi Lasernut U4 2.2 1/10 4WD RTR Rock Racer (LOS03028) includes a model-specific mix of socket head, button head, flat head and set screws, plus matching nuts and washers—with extras of the most commonly used sizes. Each kit also comes with Bondhus short arm hex wrenches in the sizes used on your kit and a durable plastic pit case you can reuse for storage and organizing hardware. Exact counts and sizes vary by model. The kit does not include electronics, shocks, motors or engines, or plastic parts.
Metal or rubber bearings for Losi Lasernut U4 2.2 1/10 4WD RTR Rock Racer (LOS03028)?
If you run your Losi Lasernut U4 2.2 1/10 4WD RTR Rock Racer (LOS03028) mainly off-road, rubber-shielded sealed bearings are usually the best choice. The rubber seals help keep out dirt, dust, sand and splash so hubs and drivetrain stay smoother longer. Metal-shielded bearings roll with slightly less drag and work best when you run mostly on clean pavement or prepared on-road tracks.
How does RC Pro Club save me money on Losi Lasernut U4 2.2 1/10 4WD RTR Rock Racer (LOS03028) kits?
RC Pro Club is our rewards program for RC builders. Every order for your Losi Lasernut U4 2.2 1/10 4WD RTR Rock Racer (LOS03028) earns points you can redeem for discounts on future screw kits and bearing kits. When you grab multiple kits for the same model—like a stainless screw kit plus metal-shielded or rubber-shielded bearings—you earn more points in a single order and unlock bigger savings over time.
What's included in the RCScrewZ bearing kits for Losi Lasernut U4 2.2 1/10 4WD RTR Rock Racer (LOS03028)?
RCScrewZ bearing kits for Losi Lasernut U4 2.2 1/10 4WD RTR Rock Racer (LOS03028) are designed as a complete upgrade package. You get every bearing needed for the chassis plus one extra of each size for quick spares. Kits can include standard, flanged, one-way and thrust bearings where your model uses them, so you are not hunting for odd sizes or partial sets. Each kit comes packed in a reusable storage case that keeps your bearings sorted in the pit box and ready for the next rebuild.

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Search by RC brand, model name, series/chassis, or OEM/model number. Exact Model Collections appear first so you can verify fit before choosing a Stainless Screw Kit, Rubber-Sealed Bearing Kit, or Metal-Shielded Bearing Kit.

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