Shield type
Rubber-Sealed (Off-Road)
SAVE
$6.28
$6.28
Why Choose This Kit
Key features and intended use for this kit.
Protection focus
Sealed against dirt & splash
Best suited for
Off-road / dirty conditions
Rubber-Shielded Bearings
RCScrewZ Rubber Shielded Bearing Kit hpi003r for HPI Racing Savage 21 RTR / Kit 1/8 Nitro 4WD Monster Truck (#831, #12840) | SET
Rubber-shielded bearings for land-based RC use where added protection from dust, dirt, sand, and mud is preferred.
Fits: HPI Racing Savage 21 1/8 Nitro 4WD Monster Truck (831, 12840)
OEM / model: 831, 12840
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
- HPI Racing Savage 21 1/8 Nitro 4WD Monster Truck (831, 12840)
- OEM / model number
- 831, 12840
- Kit type
- Rubber-Shielded Bearing Kit — Sealed for Off-Road Protection
- Scale
- 1:8
- Power
- Nitro & Glow Fuel
More compatibility details
- RC brand
- HPI Racing
- Vehicle class
- Land
- Kit SKU
- hpi003r
- Model series
- Savage
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:
- 5x10x4mm bearings
- 5x11x4mm bearings
- 6x10x3mm bearings
- 6x13x5mm bearings
- 8x16x5mm bearings
- 10x16x5mm bearings
Installation & Model NotesInstallation, cleaning, inspection, and model-specific guidance.
Seat bearings fully and squarely. Do not force them into the housing or overtighten the hardware that retains them.
After dusty, muddy, or wet runs, clean the bearing exterior and dry it thoroughly.
Inspect the bearings for roughness, binding, noise, or excessive play before reuse; service or replace them as needed.
Details & Support
Kit Details Rubber-sealed protection for off-road, dusty, dirty, and muddy running conditions.
- Seal Type
- Rubber-Sealed Bearings
- Protection Priority
- Improved protection against dirt and splash; not waterproof
- Best For
- Off-road use, dust, dirt, sand, mud, and lower-maintenance protection
- Performance Tradeoff
- Protection is prioritized over the lowest possible drag
- Not Ideal For
- Clean, dry on-road or prepared-surface use when lower drag is the priority
- Prefer Metal-Shielded?
- Choose Metal-Shielded bearings for cleaner on-road or prepared surfaces when lower drag is the priority.
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 Savage 21 1/8 Nitro 4WD Monster Truck (831, 12840)
- Compatible RC Brand
- HPI Racing
- RC Vehicle OEM / Model Number(s)
- 12840, 831
- RCScrewZ Kit Part Number
- hpi003r
Vehicle Compatibility Details
Review these vehicle details to help confirm compatibility with your RC model.
- RC Vehicle OEM / Model Number(s)
- 12840, 831
- RC Chassis Compatibility
- Savage 21 monster truck
- Compatible Vehicle Type
- Monster Truck
- Terrain Compatibility
- Compatible Scale
- 1:8
- Compatible Fuel Type
- Nitro & Glow Fuel
What Is Included
Included bearing sizes for this Rubber-Sealed Bearing Kit:
- 5x10x4mm bearings
- 5x11x4mm bearings
- 6x10x3mm bearings
- 6x13x5mm bearings
- 8x16x5mm bearings
- 10x16x5mm 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 Savage 21 RTR / Kit 1/8 Nitro Monster Truck Compatibility
Quick Fit Summary:
Compatible Brand: HPI Racing
Fit: Model-specific for the listed RC model/platform: Savage 21 RTR / Kit
Compatible RC Model/OEM Numbers: 831, 12840
Scale: 1/8
Power Source / Fuel Type: Nitro
Battery / Cell Count: Not currently verified.
Drive Type: 4WD
Vehicle Type: Monster Truck
Chassis: Savage 21 monster truck
Era: Not currently verified.
OEM / Models: 831, 12840
RC Model Terrain: Off-Road
This Kit Details:
SKU: hpi003r
MPN: hpi003r
Bearing Type: Rubber-Shielded Bearings (Off-Road / Sealed)
Sealed Bearings: Yes
Water/Dust Protection: Sealed protection against dirt, dust, and debris
Product Material: Carbon Chrome Steel Bearings
Product Color: Silver
Bearing Sizes Included: 5x10x4mm bearings; 5x11x4mm bearings; 6x10x3mm bearings; 6x13x5mm bearings; 8x16x5mm bearings; 10x16x5mm bearings
Release / Catalog Date: Not currently verified.
Product Benefits: This HPI sealed bearing kit gives Savage 21 RTR / Kit a rubber shielded bearing refresh for contamination resistance, maintenance, and consistent RC rebuild value. Rubber shielded bearings add sealed protection against dirt, dust, and debris for bashing, rally, street, track, or off-road use as applicable.
Reason to Purchase: choose rubber shielded bearings when off-road bashing, dirt, dust, debris, and durability matter more than the lowest possible rolling drag of metal shielded bearings.
Fitment Note: Match each included bearing size to the removed factory bearing, press bearings in squarely, and check for smooth movement before running the RC model.
OEM Alias Coverage: 831, 12840
Terrain Compatibility: Off-Road
Rubber-Sealed Bearing Kit Details
Review the bearing-kit details below before ordering.
- RCScrewZ Kit Part Number
- hpi003r
- Product Brand
- RCScrewZ
- Shielding Type
- Rubber-Sealed (Off-Road)
- Sealed Bearing Status
- Yes
- Bearing Material
- Dust-Resistant Carbon Chrome
- 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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Customer Reviews
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For HPI Racing Savage 21 1/8 Nitro 4WD Monster Truck (831, 12840) OEM/model: 831, 12840
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For HPI Racing Savage 21 1/8 Nitro 4WD Monster Truck (831, 12840) OEM/model: 831, 12840Continue Shopping by RC Model
Fits: HPI Racing Savage 21 1/8 Nitro 4WD Monster Truck (831, 12840)
$53.67