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Representative image of an RCScrewZ metal-shielded bearing kit for Kyosho Ultima ST GP Type-R 1/10 Nitro 2WD Truck (31971); exact bearing sizes and quantities vary by RC model.
Upgrade Your RC Car with Metal Shielded Bearings for Kyosho Ultima ST GP 31971 | kyo014b - 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 Your Need for Speed' – Highlights Metal Shielded Bearings as the top choice for unbeatable on-road RC car performance - kyo014b
Infographic: 'Choose Wisely for Off-Road Adventuring' – Recommends Rubber Sealed Bearings for maximum protection and enhanced off-road performance in RC vehicles - kyo014b
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 - kyo014b
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 - kyo014b
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 - kyo014b
RCScrewZ and J-M SUPPLIES offer high-quality RC bearing kits, available as metal shielded or rubber sealed options, suitable for diverse RC needs - kyo014b
Elevate Your RC Adventure! Image introducing Stainless Screw Kits as the Ultimate Upgrade. Offers enhanced durability, superior corrosion resistance, and a sleek look, making them a top choice for complementing high-quality bearing selections. Trusted by RC enthusiasts worldwide - kyo014b
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 - kyo014b
Infographic reminder: Refer to the item description for more detailed information about the product - kyo014b
Infographic reminder: Refer to the item description for more detailed information about the product - kyo014b
Notice: Check the product description for detailed information on the specific bearing sizes included in this bearing kit - kyo014b

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 kyo014b for Kyosho PureTen GP Ultima ST Type-R 1/10 Nitro 2WD Stadium Truck (31971) | SET

RCScrewZSKU: kyo014b

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

Fits: Kyosho Ultima ST GP Type-R 1/10 Nitro 2WD Truck (31971)
OEM / model: 31971

US
Regular price
$53.67
Sale price
$53.67
Regular price
$59.95

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
Kyosho Ultima ST GP Type-R 1/10 Nitro 2WD Truck (31971)
OEM / model number
31971
Kit type
Metal-Shielded Bearing Kit — Low-Drag for Cleaner Running
Scale
1:10
Power
Nitro & Glow Fuel
View all verified kits for this model →
More compatibility details
RC brand
Kyosho
Vehicle class
Land
Kit SKU
kyo014b
Model series
PureTen, Ultima, Ultima ST, GP Ultima ST Type-R
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:

  • 4x8x3mm bearings
  • 5x8x2.5mm bearings
  • 5x10x4mm bearings
  • 10x15x4mm 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
Kyosho Ultima ST GP Type-R 1/10 Nitro 2WD Truck (31971)
Compatible RC Brand
Kyosho
RC Vehicle OEM / Model Number(s)
31971
RCScrewZ Kit Part Number
kyo014b

Vehicle Compatibility Details

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

RC Vehicle OEM / Model Number(s)
31971
RC Chassis Compatibility
Kyosho PureTen GP Ultima ST Type-R alloy chassis (31971)
Compatible Vehicle Type
1/10 Nitro GP 2WD Stadium Truck
Terrain Compatibility
Compatible Scale
1:10
Compatible Fuel Type
Nitro & Glow Fuel

What Is Included

Included bearing sizes for this Metal-Shielded Bearing Kit:

  • 4x8x3mm bearings
  • 5x8x2.5mm bearings
  • 5x10x4mm bearings
  • 10x15x4mm 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: Kyosho

  • Fit: Model-specific fitment for Kyosho PureTen GP Ultima ST Type-R.

  • Compatible RC Model/OEM Numbers: Kyosho PureTen GP Ultima ST Type-R (31971)

  • Scale: 1/10

  • Power Source / Fuel Type: Nitro GP

  • Battery / Cell Count: Not applicable - nitro powered.

  • Drive Type: 2WD

  • Vehicle Type: 1/10 Nitro GP 2WD Stadium Truck

  • Chassis: Kyosho PureTen GP Ultima ST Type-R alloy chassis (31971)

  • Era: Modern Transition (2000-2009)

  • OEM / Models: 31971

  • RC Model Terrain: Off-Road: Dirt, Clay & Loose Surfaces

This Kit Details:

  • SKU: kyo014b

  • MPN: kyo014b

  • Kit Type: Metal Shielded Bearing Kit

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

  • Sealed Bearings: No

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

  • Bearing Size Details: 4x8x3mm bearings; 5x8x2.5mm bearings; 5x10x4mm bearings; 10x15x4mm bearings

  • Product Material: Carbon Chrome Steel Bearings

  • Product Color: Silver

OEM / Model Code / Alias Coverage:

Compatible with Kyosho OEM/model number 31971. Use the OEM/model number in your manual, box, or chassis paperwork to confirm fitment before ordering.

Model Family Coverage:

PureTen, Ultima, Ultima ST, GP Ultima ST Type-R

Product Benefits:

  • Metal shielded bearings are tuned for lower rolling resistance and smoother drivetrain rotation on cleaner surfaces.

  • Best choice for on-road, carpet, display builds, light-duty use, or racers who prefer low-drag performance over maximum contamination protection.

  • Maintenance tip: clean and re-oil metal shielded bearings regularly for best performance.

Fitment Note:

This is a model-specific RCScrewZ kit for Kyosho PureTen GP Ultima ST Type-R (31971). It is not a random assortment and should be matched to the exact Kyosho OEM/model number before purchase.

Search-Friendly Notes:

Helpful search phrases: Kyosho PureTen GP Ultima ST Type-R, Kyosho PureTen GP Ultima ST Type-R, 31971, RCScrewZ Metal Shielded Bearing Kit, Kyosho RC parts.

Metal-Shielded Bearing Kit Details

Review the bearing-kit details below before ordering.

RCScrewZ Kit Part Number
kyo014b
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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Rubber-Sealed Bearing Kit

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Fits: Kyosho Ultima ST GP Type-R 1/10 Nitro 2WD Truck (31971)
$53.67