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Representative image of an RCScrewZ rubber-sealed bearing kit for Kyosho Ultima RB Racing Sports 1/10 Electric 2WD Buggy (30072); exact bearing sizes and quantities vary by RC model.

Upgrade Your RC Car with Rubber Shielded Bearings for Kyosho Ultima RB RS 30072 | kyo023r - 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: '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 - kyo023r

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 - kyo023r

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 - kyo023r

RCScrewZ and J-M SUPPLIES offer high-quality RC bearing kits, available as metal shielded or rubber sealed options, suitable for diverse RC needs - kyo023r

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 - kyo023r

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 - kyo023r

Infographic reminder: Refer to the item description for more detailed information about the product - kyo023r

Notice: Check the product description for detailed information on the specific bearing sizes included in this bearing kit - kyo023r

Why Choose This Kit

Key features and intended use for this kit.

Shield type

Rubber-Sealed (Off-Road)

Protection focus

Sealed against dirt & splash

Best suited for

Off-road / dirty conditions

Rubber-Shielded Bearings

RCScrewZ Rubber Shielded Bearing Kit kyo023r for Kyosho EP Ultima RB Racing Sports 1/10 Electric 2WD Off-Road Buggy (30072) | SET

Name: RCScrewZ Rubber Shielded Bearing Kit kyo023r for Kyosho EP Ultima RB Racing Sports 1/10 Electric 2WD Off-Road Buggy (30072) | SET
Brand: RCScrewZ
SKU: kyo023r
Price: 38.94 USD
Availability: InStock

RCScrewZSKU: kyo023r

Rubber-shielded bearings for land-based RC use where added protection from dust, dirt, sand, and mud is preferred.

Fits: Kyosho Ultima RB Racing Sports 1/10 Electric 2WD Buggy (30072)
OEM / model: 30072

Regular price: $38.94
Sale price: $38.94
Regular price: ~~$43.95~~
Unit price: per

In stock

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Confirm this kit fits your RCMatch the RC model and OEM/model number shown above to your vehicle.

RC model: Kyosho Ultima RB Racing Sports 1/10 Electric 2WD Buggy (30072)
OEM / model number: 30072

Kit type: Rubber-Shielded Bearing Kit — Sealed for Off-Road Protection
Scale: 1:10
Power: Electric

View all verified kits for this model →

More compatibility details

RC brand: Kyosho
Vehicle class: Land
Kit SKU: kyo023r
Model series: Ultima, Ultima RB, Racing Sports

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
5x10x4mm bearings
8x14x4mm bearings
3/16″ x 3/8″ 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: Kyosho Ultima RB Racing Sports 1/10 Electric 2WD Buggy (30072)
Compatible RC Brand: Kyosho
RC Vehicle OEM / Model Number(s): 30072
RCScrewZ Kit Part Number: kyo023r

Vehicle Compatibility Details

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

RC Vehicle OEM / Model Number(s): 30072
RC Chassis Compatibility: Kyosho Ultima RB Racing Sports 2WD buggy chassis (30072)
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 Rubber-Sealed Bearing Kit:

4x8x3mm bearings
5x10x4mm bearings
8x14x4mm bearings
3/16″ x 3/8″ 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

Rubber Shielded Bearing Kit Compatibility:

Quick Fit Summary:

Compatible Brand: Kyosho
Fit: Model-specific fitment for Kyosho EP Ultima RB Racing Sports.
Compatible RC Model/OEM Numbers: Kyosho EP Ultima RB Racing Sports (30072)
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 RB Racing Sports 2WD buggy chassis (30072)
Era: Modern Transition (2000-2009)
OEM / Models: 30072
RC Model Terrain: Off-Road: Dirt, Clay & Loose Surfaces

This Kit Details:

SKU: kyo023r
MPN: kyo023r
Kit Type: Rubber Shielded Bearing Kit
Bearing Type: Rubber-Shielded Bearings (Off-Road / Sealed)
Sealed Bearings: Yes
Water/Dust Protection: Sealed protection against dirt, dust, and debris
Bearing Size Details: 4x8x3mm bearings; 5x10x4mm bearings; 8x14x4mm bearings; 3/16 x 3/8 inch bearings
Product Material: Carbon Chrome Steel Bearings
Product Color: Silver

OEM / Model Code / Alias Coverage:

Compatible with Kyosho OEM/model number(s) 30072. Use the OEM/model number in your manual, box, or chassis paperwork to confirm fitment before ordering.

Model Family Coverage:

Ultima, Ultima RB, Racing Sports

Product Benefits:

Rubber shielded bearings add sealed protection against dirt, dust, and debris for outdoor or off-road RC use.
Helpful for dusty storage, parking-lot running, grass, clay, loose dirt, or mixed-surface driving.

Reason to Purchase:

Choose rubber shielded bearings when contamination protection matters more than the lowest possible rolling drag. They are the better choice for off-road, dusty, dirty, or debris-prone RC use compared with metal shielded bearings tuned for low drag.

Fitment Note:

This is a model-specific RCScrewZ kit for Kyosho EP Ultima RB Racing Sports. Match your Kyosho OEM/model number to 30072 before ordering.

Search-Friendly Notes:

Common buyer searches include Kyosho Ultima parts, Kyosho Kyosho EP Ultima RB Racing Sports screw kit, Kyosho Kyosho EP Ultima RB Racing Sports bearings, and Kyosho OEM 30072 replacement hardware.