Overview
The Kyosho Ultima RB7.5 is a race-bred 1/10 scale electric 2WD off-road buggy kit developed for high-level competition and serious club racing. As the latest evolution in Kyosho's legendary Ultima lineage—which boasts multiple world championship titles—the RB7.5 delivers refined geometry, improved durability, and enhanced tuning flexibility for modern dirt and carpet tracks.
Building on the proven RB7 platform, the RB7.5 incorporates numerous refinements including big-bore oil shocks with X-ring seals, carbon fiber shock stays, aluminum rear bulkheads and hub carriers, and an improved aerodynamic body package with front wing included as standard. Whether on traditional dirt tracks or modern high-grip carpet surfaces, this kit is built to meet the demands of competitive drivers.
Key Features
- Championship-proven Ultima 2WD platform updated for modern racing
- 13mm big-bore aluminum oil shocks with X-ring seals
- 4mm carbon fiber front and rear shock stays
- Aluminum rear bulkheads and hub carriers for enhanced rigidity
- Tungsten differential balls for precision and durability
- Improved aerodynamic body with front wing included
- Low center of gravity duralumin main chassis
- Ball differential with slipper clutch protection
- Chrome-molybdenum steel turnbuckles and linkages
Performance Benefits
- Big-bore shocks provide stability at high speeds and over rough terrain
- Carbon shock stays offer lightweight strength and rigidity
- Aluminum rear components broaden setup options
- Front wing aids aerial posture during jumps
- Midship motor layout optimizes weight distribution
- Compatible with existing optional parts for further upgrades
Usage Notes
Compatible RC Scales: 1/10 scale off-road
Best For: Competition racing, club racing, dirt tracks, high-grip carpet surfaces
Kit is primarily designed for dirt track use but can be modified for carpet with minimal adjustments.
Technical Specs
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Brand: Kyosho
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Model: Ultima RB7.5
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Scale: 1/10
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Length: 395mm
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Width: 249mm
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Height: 148mm
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Wheelbase: 277mm
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Tread (F/R): 221mm / 201mm
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Drivetrain: 2WD (RWD)
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Power Type: Electric (electronics not included)
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Vehicle Type: Off-Road Competition Buggy
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Completion Level: Assembly Kit
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Part Number: 34305
What's Included
- Kyosho Ultima RB7.5 unassembled kit components
- Duralumin main chassis plate
- Carbon fiber shock stays (front and rear)
- 13mm aluminum oil shocks
- Aluminum rear bulkheads and hub carriers
- Ball differential with tungsten balls
- Slipper clutch assembly
- Clear polycarbonate body with rear wing
- Front wing
- Assembly tools (hex wrenches, cross wrench)
- Ball differential grease
- Illustrated instruction manual
Note: Tires sold separately.
Needed to Complete
- Electric motor (540 size)
- Electronic Speed Controller (ESC)
- Steering servo
- 2.4GHz transmitter and receiver
- Pinion gear
- Tires and tire inserts
- Battery pack (7.2V-7.4V recommended)
- Battery charger
- Body paint
- Assembly tools
Summary
The Kyosho Ultima RB7.5 delivers championship-level 2WD buggy performance with refined suspension geometry, big-bore shocks, carbon fiber components, and extensive tuning capability. Built on decades of racing heritage, it's the ideal platform for competitive drivers seeking podium performance.
