Trusted PayPal checkout — fast, secure, and familiar.

SAVE
$6.28
Representative image of an RCScrewZ metal-shielded bearing kit for Kyosho Ultima 1/10 Electric 2WD Buggy (3115); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Kyosho Ultima 1/10 Electric 2WD Buggy (3115); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Kyosho Ultima 1/10 Electric 2WD Buggy (3115); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Kyosho Ultima 1/10 Electric 2WD Buggy (3115); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Kyosho Ultima 1/10 Electric 2WD Buggy (3115); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Kyosho Ultima 1/10 Electric 2WD Buggy (3115); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Kyosho Ultima 1/10 Electric 2WD Buggy (3115); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Kyosho Ultima 1/10 Electric 2WD Buggy (3115); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Kyosho Ultima 1/10 Electric 2WD Buggy (3115); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Kyosho Ultima 1/10 Electric 2WD Buggy (3115); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Kyosho Ultima 1/10 Electric 2WD Buggy (3115); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Kyosho Ultima 1/10 Electric 2WD Buggy (3115); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Kyosho Ultima 1/10 Electric 2WD Buggy (3115); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Kyosho Ultima 1/10 Electric 2WD Buggy (3115); exact bearing sizes and quantities vary by RC model.
Representative image of an RCScrewZ metal-shielded bearing kit for Kyosho Ultima 1/10 Electric 2WD Buggy (3115); exact bearing sizes and quantities vary by RC model.

RCScrewZ Metal Shielded Bearing Kit kyo073b for Kyosho Ultima 1/10 Electric 2WD Off-Road Racing Buggy (3115) | RCX

(1)

RCScrewZ

SKU: kyo073b

Regular price
$53.67
Sale price
$53.67
Regular price
$59.95
Shipping, stock & payment info
Quick snapshot of availability, estimated delivery, and our shipping/returns.

Available Quantity: 98

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

👇 👇 👇
View Cart & Checkout

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:

Kyosho Ultima 1/10 2WD Buggy (#3115 Vintage) Released 1986 — 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: Kyosho
  • RC Model: Kyosho Ultima 1/10 Electric 2WD Buggy (3115)
  • Scale: 1:10
  • Power Source / Fuel Type: Electric
  • Chassis: Kyosho Ultima buggy chassis (3115)
  • Era: Early Classics (1980-1989)
  • OEM / Models: 3115
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: Kyosho
  • Fit: Kyosho Ultima 1/10 Electric 2WD Buggy (3115)
  • Compatible RC Model Numbers: 3115
  • Scale: 1:10
  • Power Source / Fuel Type: Electric
  • Vehicle Type: 1/10 Electric 2WD Off-Road Racing Buggy
  • Chassis: Kyosho Ultima buggy chassis (3115)
  • Era: Early Classics (1980-1989)
  • RC Model Terrain: Off-Road: Dirt, Clay & Track

This Kit Details

  • SKU: kyo073b
  • MPN: kyo073b
  • 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: 4x8x3mm bearings · 5x10x4mm bearings · 8x14x4mm bearings · 10x15x4mm 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
Kyosho Ultima 1/10 Electric 2WD Buggy (3115)
Compatible RC Brand
Kyosho
RC Vehicle OEM / Model Number(s)
3115
RCScrewZ Kit Part Number
kyo073b

Vehicle Compatibility Details

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

RC Vehicle OEM / Model Number(s)
3115
RC Chassis Compatibility
Kyosho Ultima buggy chassis (3115)
Compatible Vehicle Type
1/10 Electric 2WD Off-Road Racing Buggy
Terrain Compatibility
Compatible Scale
1:10
Compatible Fuel Type
Electric

What Is Included

Included bearing sizes for this Metal-Shielded Bearing Kit:

  • 4x8x3mm bearings
  • 5x10x4mm bearings
  • 8x14x4mm 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 Ultima 1/10 Electric 2WD Buggy, OEM/model code 3115.

  • Compatible RC Model/OEM Numbers: 3115

  • Scale: 1/10

  • Power Source / Fuel Type: Electric

  • Battery / Cell Count: Not currently verified

  • Drive Type: 2WD

  • Vehicle Type: 1/10 Electric 2WD Off-Road Racing Buggy

  • Chassis: Kyosho Ultima buggy chassis (3115)

  • Era: Early Classics (1980-1989)

  • OEM / Models: 3115

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

This Kit Details:

  • SKU: kyo073b

  • MPN: kyo073b

  • 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

  • Product Material: Carbon Chrome Steel Bearings

  • Product Color: Silver

OEM / Model Code / Alias Coverage:

  • 3115

Model Family Coverage:

  • Ultima

Product Benefits:

  • Metal shielded bearings are tuned for lower rolling drag and smooth drivetrain feel in cleaner running conditions.
  • Best for race prep, display builds, on-road use, or buyers who prefer reduced friction over maximum contamination protection.

Bearing Size Details:

  • 4x8x3mm bearings
  • 5x10x4mm bearings
  • 8x14x4mm bearings
  • 10x15x4mm bearings

Fitment Note: This fitment is for the original Kyosho Ultima 3115 and is not intended for Ultima II 3118 or later variants.

Release Date: 1986 Release

Search-Friendly Notes: Compatible with Kyosho builders searching by model name, series, and OEM/model number for the correct RCScrewZ screw kit or bearing kit.

Metal-Shielded Bearing Kit Details

Review the bearing-kit details below before ordering.

RCScrewZ Kit Part Number
kyo073b
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: Kyosho Ultima 1/10 Electric 2WD Buggy (3115)
$53.67

Trusted PayPal checkout — fast, secure, and familiar.