Kyosho Ultima RB7.5
Brand: Kyosho
Part No: K.34305B
Shadow Stock: Usually ships within 4-5 days
Refined from the championship-proven RB7 platform, the Kyosho Ultima RB7.5 (K.34305B) is a 1/10 scale rear-wheel-drive electric racing buggy engineered for today’s high-grip tracks while remaining adaptable for traditional dirt. It adds big-bore aluminium oil shocks with X-ring seals, 4mm carbon shock stays and a suite of rigidity and geometry updates to deliver precise handling, durability and consistent lap-after-lap performance. The body is supplied unpainted, with a front wing now included as standard.
Key Features
- Big-bore aluminium oil shocks with X-ring seals and 13mm pistons for smooth damping and leak resistance
- 4mm carbon fibre front and rear shock stays with integrated protection to resist rollover damage
- Midship motor layout on a high-rigidity duralumin main chassis
- Reinforced centre bulk support for improved corner-exit traction
- New body with refined aerodynamics, plus redesigned high-strength rear wing and included front wing
- LCG battery mount with tool-free, one-touch installation and fore-aft weight adjustment
Chassis, Drivetrain And Suspension
- Laydown-type gearbox with spur gear cover; gearbox type can be changed by purchasing parts separately
- Ball differential for dirt track use with high-precision tungsten diff balls
- Slipper clutch to protect the drivetrain under excessive load
- Lightweight aluminium front shafts and universal swing-type rear shafts for efficient power delivery
- Aluminium rear bulkheads and hub carriers for increased rigidity and broader setup range
- Aluminium steering crank and plate for smooth, precise steering; revised upper bulkhead to prevent servo horn interference
- Double wishbone suspension with upgraded springs for stability over bumps and landings
Aerodynamics And Handling
- RB7-based body with revised rear-cabin spoiler for added efficiency
- Redesigned rear wing for stronger, stable downforce
- Front wing (previously optional) now included to fine-tune jump attitude and cornering balance
Tuning And Setup Potential
- Aluminium rear suspension holder allows rear toe and tread changes via bushings
- Redesigned aluminium rear hub carriers enable upper link length changes using spacers; increased bearing capacity
- Separate upper rod mounting on the new rear bulkhead with aluminium upper rod mount for adjustable link height
- Turnbuckle upper suspension and steering links made from durable chrome-molybdenum steel
- Designed primarily for dirt, with minimal adjustments suggested for high-grip carpet
- Suggested compatibility with existing optional parts for further setting modifications and upgrades
Focused on precision, efficiency and ruggedness, the Ultima RB7.5 brings meaningful refinements to a proven race platform, giving competitive drivers a confident, adaptable 2WD buggy for a wide range of track conditions.
Secured by Stripe
Kyosho's 1/10 scale Ultima EP buggy boasts a rich racing history, including multiple world championship titles, and continues to offer a diverse lineup ranging from entry-level to high-end models. Now, its top-tier RB7 has evolved into the upgraded RB7.5, incorporating numerous refinements to enhance performance.
The new model adopts big-bore oil shocks equipped with X-ring seals for smoother operation and leak prevention. The shock stays have been upgraded to lightweight yet highly durable carbon fiber, offering greater strength for intense racing conditions. A newly added front shock stay guard helps prevent damage during rollovers. At the rear, aluminum bulkheads and hub carriers enhance rigidity while broadening setup options. The body is based on the RB7, but a spoiler on the rear of the cabin combines with an improved rear wing and the addition of a front wing to optimize aerodynamic performance.
By integrating newly developed components and standardizing several high-performance upgrades, the RB7.5 remains true to its original strengths while evolving into a machine capable of competing at the highest level. Whether on traditional dirt tracks or modern high-grip carpet surfaces, this latest Ultima model is built to meet the demands of competitive drivers.
●Low center of gravity design 1/10 scale EP (electric) racing buggy, adapted for high-grip surfaces.
●Features new body with improved aerodynamics based on the previous model. The body comes unpainted in the kit.
●The double wishbone front and rear suspension provides excellent surface tracking and is equipped with newly designed aluminum oil shocks.
●Lightweight aluminum front shafts and universal swing-type rear shafts provide excellent drive efficiency.
●Turnbuckle upper suspension rods and steering linkage rods are made from highly durable, crash-resistant chrome-molybdenum steel.
●Aluminum rear suspension holder allows adjustment of rear toe angle and tread by swapping bushings.
●Laydown-type gearbox features a spur gear cover. Gearbox type can be changed by purchasing parts separately.
●Equipped with a ball differential for dirt track use and a slipper clutch to protect the gears from excessive load.
●Differential balls are made from high-precision, durable tungsten.
●The kit is primarily designed for dirt track use but can be easily modified for high-grip carpet surfaces with minimal adjustments.
●Compatible with existing optional parts for setting modifications and upgrades.
This rear-wheel-drive off-road buggy features a midship layout, positioning the motor just ahead of the rear wheels. The high-rigidity duralumin main chassis has undergone slight modifications, while the proven low-profile gearbox and other key components have been carried over from the Ultima RB7.
A new body based on the superb aerodynamics of the RB7, features design modifications to the rear cabin to further enhance efficiency. The rear wing has also been redesigned for increased strength, generating powerful and stable downforce.
The front and rear shock stays have been upgraded from the RB7's plastic material to 4mm thick carbon fiber, significantly enhancing strength and rigidity. The new design provides better protection against damage during rollovers, and a resin protector comes standard to safeguard both carpet and artificial grass surfaces.
New aluminum oil shocks with 13mm pistons enhance stability at high speeds and over uneven surfaces while effectively absorbing landing impacts. The springs have also been upgraded for improved performance.
The aluminum steering crank and plate ensure smooth operation and high rigidity, enhancing steering response. Additionally, the upper bulkhead shape has been modified to prevent interference with the servo horn.
The completely redesigned aluminum rear hub carriers allow for changes in upper rod length by adjusting spacer thickness, increasing the capacity for ball bearings. The height of the suspension pins can be adjusted by replacing the resin bushings.
The new rear bulkhead features a separate upper rod mounting point. The aluminum upper rod mount enhances suspension rigidity and allows for tuning of the suspension geometry by adjusting the rod mounting height.
The LCG battery mount allows forward-back weight distribution adjustments and features a tool-free, one-touch system for quick battery installation and removal.
The previously optional front wing is now included as standard. It helps adjust aerial posture during jumps and serves as an effective tuning part, also altering cornering characteristics.
The increased rigidity from the addition of the center bulk support results in improved traction when exiting corners.
Key Info:
- Brand: Kyosho
- Part No: K.34305B
- Barcode: 4548565489800
- Scale: 1:10
- Vehicle Type: Buggy
- Power Source: Electric - No Motor
- Surface Type: Off Road
- Build Level: Unassembled (Kit)
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Kyosho Ultima RB7.5 Carbon Battery Holder
Kyosho Ultima RB7.5 Rear Anti-roll Bar 1.5mm
KYOSHO Pinion Gear (26T-48DP) Steel (UM326)
Kyosho Ultima RB7.5 Dual Slipper Sheet (White) (UM516B)
Kyosho Metallic Flanged Cap Screw 3X6mm (5)
Kyosho Ultima RB7.5 Carbon Front Damper Stay
Kyosho Washers 3X7X0.5mm (10)
Kyosho Ultima RB7.5 Front Suspension Arm Set
Kyosho 5.8mm Ball End (4) L=12
Front Wheel 2.2 Kyosho Ultima RB5-RB7-SB DirtMaster (2) Yellow
Kyosho Ultima RB7.5 Suspension Shaft 44mm (LA230)
Kyosho Lazer 1:10 4WD 2.2 Rear Wheel 2.2 (2) White
KYOSHO Pinion Gear (28T-48DP) Steel (UM328)
Kyosho Ultima RB7.5 Ball Diff Gear Set (52T) (UM509B)
Kyosho Hex Flat-Head Screws 3X10mm (10)