Shield type
Metal-Shielded (On-Road)
SAVE
$6.28
$6.28
Why Choose This Kit
Key features and intended use for this kit.
Performance focus
Low-drag, not sealed
Best suited for
Cleaner on-road / prepared surfaces
Metal-Shielded Bearings
RCScrewZ Metal Shielded Bearing Kit tam280b for Tamiya TRF421X 1/10 Electric 4WD On-Road Touring Car Chassis Kit (#42391) | SET
Model-specific metal-shielded bearings for smooth, low-drag operation on cleaner on-road or prepared surfaces.
Fits: Tamiya TRF421X 1/10 Electric 4WD Touring Car (42391)
OEM / model: 42391
US
- Regular price
- $53.67
- Sale price
- $53.67
- Regular price
-
$59.95
In stock
Confirm this kit fits your RCMatch the RC model and OEM/model number shown above to your vehicle.
Confirm This Fits Your RC
Match the RC model and OEM/model number below before ordering.
- RC model
- Tamiya TRF421X 1/10 Electric 4WD Touring Car (42391)
- OEM / model number
- 42391
- Kit type
- Metal-Shielded Bearing Kit — Low-Drag for Cleaner Running
- Scale
- 1:10
- Power
- Electric
More compatibility details
- RC brand
- Tamiya
- Terrain
- On-road
- Vehicle class
- Land
- Kit SKU
- tam280b
- Model series
- TRF421X, TRF421, TRF
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 assigned to 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
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
- Tamiya TRF421X 1/10 Electric 4WD Touring Car (42391)
- Compatible RC Brand
- Tamiya
- RC Vehicle OEM / Model Number(s)
- 42391
- RCScrewZ Kit Part Number
- tam280b
Vehicle Compatibility Details
Review these vehicle details to help confirm compatibility with your RC model.
- RC Vehicle OEM / Model Number(s)
- 42391
- RC Chassis Compatibility
- Tamiya TRF421X Belt-Driven 4WD Chassis (42391)
- Compatible Vehicle Type
- 1/10 Electric 4WD On-Road Touring Car
- Terrain Compatibility
- On-road
- Compatible Scale
- 1:10
- Compatible Fuel Type
- Electric
What Is Included
Included bearing sizes for this Metal-Shielded Bearing Kit:
Note: The specific bearing sizes will be listed soon. In the meantime, please contact us for detailed information about the sizes included in this kit. We're happy to assist you!
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: Tamiya
Fit: Model-specific fitment for Tamiya TRF421X Chassis Kit
Compatible RC Model/OEM Numbers: 42391
Scale: 1/10
Power Source / Fuel Type: Electric
Battery / Cell Count: Not currently verified.
Drive Type: 4WD
Vehicle Type: On-Road Touring Car
Chassis: TRF421X
Era: Next Gen Era (2020–Present)
OEM / Models: 42391
RC Model Terrain: On-Road: Carpet, Asphalt & High-Grip Track
This Kit Details:
SKU: tam280b
MPN: tam280b
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: Not currently verified.
OEM / Model Code / Alias Coverage:
OEM Model Codes: 42391
Alias / Series Coverage: TRF421X, TRF421, TRF
Model Family Coverage:
Tamiya TRF421X Chassis Kit family coverage uses the listed OEM model codes only. Verify your kit number against 42391 before ordering.
Product Benefits:
Metal-shielded bearings are tuned for reduced friction, low-drag rolling performance, and a smooth drivetrain feel in clean, dry, controlled running conditions.
Fitment Note:
Compatible with Tamiya TRF421X Chassis Kit using OEM model code(s) 42391. Specialty pins, shafts, shoulder hardware, and non-standard upgraded hardware are not claimed unless shown in confirmed kit contents.
Release Date: 2026 Release
Search-Friendly Notes:
Search-friendly fitment terms include Tamiya bearing kit, Tamiya bearings, TRF421X bearings, TRF421X bearings, low-drag RC bearings, and metal shielded bearings.
Metal-Shielded Bearing Kit Details
Review the bearing-kit details below before ordering.
- RCScrewZ Kit Part Number
- tam280b
- Product Brand
- RCScrewZ
- Shielding Type
- Metal-Shielded (On-Road)
- Sealed Bearing Status
- No
- Bearing Material
- Carbon Chrome Steel
- Approximate Piece Count
- Piece count information will be available shortly.
- 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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Customer Reviews
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Fits: Tamiya TRF421X 1/10 Electric 4WD Touring Car (42391)
$53.67