XRay RX8 2026 1/8 Nitro On-Road Car Kit XR340010

XRAY RX8'26 All-new features - Part 1

• The all-new chassis design features new flex characteristics & lowered CG
• All-new chassis uses M4 screws throughout, for quick and reliable assembly and maintenance
• Chassis sides and engine position were milled down for laydown servo mounting & lowered engine position
• The rear solid axle & front one-way outdrives are lightened to reduce drivetrain rotational mass
• The front aluminum one-way axle is now hard coated for improved durability & reliability
• CVD rear driveshafts are matched to the lightweight aluminum wheel axles and super lightweight rear solid axle
• 2nd gear shaft has been strategically lightened to reduce rotating mass, and heat treated for maximum lifespan
• All-new 3 ball-bearing equipped belt tensioners increase reliability and prevent belt skipping
• Piston brake system features an aluminum stand, and brake pads with special material, glued in-house
• New adapter for brake disc and pulley is made from a hard coated, lightweight aluminum 7075 T6 material
• New lightweight aluminum 2nd gear drum features more precise bearing holes
• New aluminum engine mounts are strengthened for more reliable engine mounting
• Front left aluminum bulkhead features stronger M4 set screw muffler mount for more security
• Aluminum 2nd speed shaft stand allows for attachment of the carbon plate for the middle belt tensioner
• The aluminum rear lower arm holder now features M4 screws for more reliable and secure installation
• The new carbon radio plate features a unique flex system with two flex alternatives
• The new radio plate uses a laydown throttle servo configuration to lower CG
• A new linkage system is mounted on top of the radio plate which allow the servo to be installed super low on the chassis to lower CG
• Composite holder for throttle & brake linkages uses steel bushings for secure attachment to the aluminium horns, for minimum play
• New aluminum radio plate holders are designed for use in conjunction with the radio plate to improve multi-flex functions
• One-piece aluminum servo holders ensure reliable mounting of the servo onto the radio plate
• The servo saver stand uses a steel washer and centering bushing to adjust front flex

XRAY RX8'26 All-new features - Part 2

• Front middle shaft holder features integrated ball-bearing equipped belt tensioners for the front and side belts.
• The rear upper arm is extended for improved ball joint support.
• The one piece carbon downstop limiters are mounted directly onto the front arm for more precise downstop adjustment and reduced unsprung weight
• Carbon shock mounts have been redesigned to be super lightweight to reduce unsprung mass
• The redesigned upper arm holder features a guide for the ball-bearing equipped body holder
• Rear body holder is now ball-bearing equipped for near friction-less operation
• The carbon rear shock absorber holder features new shock positions that improves the stability of the car
• The front carbon upper bracket is mounted to center stand for independently moving bumper holder that will not deform in crashes
• Carbon steering plates are super light and strong to reduce unsprung mass and improve reliability
• Tighter fitment of the aluminium anti-rollbar collars into the ball-bearings allows for more precise operation of the anti-roll system
• Front and rear ball joints for anti-roll bars are improved for more precise anti-roll bar operation
• The aluminum D-shaped clamp allows for collision-free movement of the anti-roll bar on the front axle
• The new Centax clutch design uses larger ball bearings for a more reliable clutch operation
• New more reliable mounting of the ball-bearings inside the clutch bell improves the axial bearing mounting
• Super lightweight hard nickel-coated aluminium clutch bell designed for larger ball bearings
• New aluminum, hard coated, first and second gears
• New clutch spring improves consistency and does not deform during operation. The inner hole in the spring is ground for smooth spring operation
• All shock absorbers utilize shorter lower ball joints which moves shocks closer to the wheels, for an improved stability of the car

Chassis

The all-new chassis design features new flex characteristics and uses M4 screws throughout for easy & reliable assembly. The milled-out sides of the chassis allow for a laydown servo mounting configuration for the lowest possible CG. Thanks to the significantly lowered overall CG of the electronics, the car is more dynamic with improved cornering speed.

The chassis has cut-outs for the bulkheads, arm mounts, radio plate mounts, and front layshaft holder for perfect fitment to ensure these parts will always mount into the same precise position.

The beveled outer edges of the chassis and countersunk screw holes to provide a smooth lower surface for maximum clearance during cornering.

The lightweight chassis is CNC-machined from 5mm premium Swiss 7075 T6 aluminum, strategically machined in low-stress areas to make it as light as possible without affecting strength or rigidity.

Drive Train

The front and rear aluminum CVD wheel axles are machined from 7075 T6 hard coated aluminum material to reduce rotating mass of the drivetrain to improve efficiency and acceleration.

The front aluminum one-way axle is hard coated to improve durability & reliability.

The rear solid axle, as well as the front one-way axle outdrives are lightened to reduce overall rotating mass of the drivetrain that improves efficiency and acceleration.

All outdrives are manufactured from HUDY Spring Steel™ and are specially ground for maximum precision. All pulleys have self-cleaning holes to reduce buildup.

The front 1-way and rear solid axle are small and light, ensuring super-low rotating mass and lowest CG. The super-lightweight front 1-way bearing is inserted directly in the axle, and the axle body is machined from Swiss 7075 T6 aluminum.

The tiny drive shafts are manufactured from HUDY Spring Steel™, the most effective drive shaft material by the industry leader HUDY. Self-developed HUDY Spring Steel™ ensures the longest drive shaft life, maximum strength, and lowest weight. Hardened with a proprietary process, the drive shafts provide unbeatable lifetime and reliability.

Steering Blocks

The steering block extensions are machined from super lightweight and strong carbon fiber to reduce unsprung weight and improve reliability.

The steering blocks are molded from a hard composite mixture to keep suspension geometry consistent and to provide stability and accuracy.

Thanks to perfect molding, bearings fit into the steering blocks without any extra play for maximum stability and steering.

The included 0° kingpin steering blocks allow installation of optional carbon aerodynamic disks that can improve both low & high-speed steering and improve stability in high-speed corners.

The steering block extension is mounted to the steering block and features 3 different Ackermann positions. The kit includes 2mm bump steer shims for optimized bump steer characteristics and is adjusted by adding or removing shims if a different steering feel is needed.

2-Speed Gear

The 2-speed features updated alu carrier which is now additionally machined for reduced weight and is machined from harder Swiss 7075 T6 aluminum to increase lifespan. The 2nd gear shaft is strategically lightened to reduce rotatin mass & heat treated for maximum lifespan.

Rear Shock Geometry

Redesigned rear shock geometry includes shock absorber mounted more outside of the wheel which increases stability of the car. The uprights were redesigned & machined to allow the shock absorbers to be mounted on new redesigned carbon shock mounting extensions. The shock mounting extensions are now machined from carbon, to reduce unsprung weight.

The carbon rear shock absorber holder features new shock position to accommodate the shortened shock absorbers to improve the stability of the car.

The shock absorbers feature shorter lower ball joints to accommodate the new geometry.

Front Suspension

The front suspension also features new shock mount extensions that position the shock further out on the arm for enhanced stability, with one-piece carbon downstop limiters mounted directly on the front arm for more precise adjustment while also reducing unsprung weight.

Shock mount extensions are machined from carbon instead of alu to reduce unsprung mass.

The front anti-roll bar shape is updated to improve operation. A tighter fitment of the aluminium collars in the ball-bearings allows for more precise operation of the anti-roll bars, while the alu D-shaped clamp allows for interference-free movement of the anti-roll bar.

Rear Upper Suspension

Redesigned upper arm holder features a guide for the ball-bearing equipped body holder. The rear upper arms are extended to improve outer ball joint control. Rear body holder is now ball-bearing equipped for super smooth & friction-less operation.

Clutch

The new Centax BBB clutch features larger ball bearings with improved reliability and longevity, and their position within the bell allows for improved axial bearing mounting precision that improves clutch consistency.

The clutch uses a super lightweight, hard nickel-coated aluminum clutch bell specifically designed for these larger bearings along with redesigned hard-coated aluminum gears that fit the new clutch bell dimensions.

Clutch

The new Centax BBB clutch is designed for the use of Bigger Ball Bearings for increased reliability & lifetime. New more reliable ball-bearings mounting inside the clutch bell improves the axial bearing mounting precision.
The super lightweight hard nickel coated aluminium BBB clutch bell is designed for bigger ball bearings.

Redesigned hard coated first and second alu gears fit the new BBB clutch bell.

New clutch spring has improved stability & stiffness and does not deform during operation. The hole in the spring is ground for a smooth spring operation.

Belt Tensioners & Engine Mounts

All-new ball-bearing equipped belt tensioners were added to the platform to increase reliability and prevent belt skipping. New front belt tensioner ensures proper front belt tension, and two side tensioners ensure maximum free side belt operation with minimum resistance.

Front layshaft stand features integrated ball-bearing equipped front belt tensioner and carbon plate with belt tensioner for side belt.

Aluminum stand for 2nd speed shaft was redesigned and includes attachment of the carbon plate for the middle belt tensioner.

New aluminum engine mounts are redesigned for increased strength for more reliable mounting of the engine to the chassis plate.

Brake System

A new piston brake system features an aluminum stand, in which pistons are pushed through the brake cam part, pressuring onto the alu hardcoated brake pads and lining, onto the ventilated & lightened steel brake disc.

The brake cam is made from a hard coated aluminum 7075 T6 material and is mounted on ball-bearings.

The brake pads are guided onto steel hardened pins for a perfectly smooth operation.

The lining of the brake pads is made from a special material, which allows for a very smooth brake feel. The special material is glued onto the pads in-house, using a special gluing method for maximum reliability.

The new super lightweight alu adapter for brake disc and pulley is lock washer secured.

Multi-Flex System

The unique carbon radio plate features a new flex system for quick & easy changes between soft or stiff flex settings for fine tuning the handling.

Stiff flex – all rear screws are installed

Soft flex - two screws behind the fuel tank are removed

The radio plate also allows for changing the bushings above the servo saver to alternate between a fixed or flexible front attachment of the radio plate, which adjusts the overall flex level of the car.

New aluminum radio plate stands are designed for use in conjunction with the radio plate as part of the improved multi-flex system.

Servo Holders

The new radio plate & one-piece alu servo holders allow for a laydown throttle servo configuration for a lowered CG.

A new linkage system is mounted on top of the radio plate for controlling throttle and brake linkages to allow the servo to be installed super low on the chassis to reduce CG.

Linkage system includes aluminum cam holder and uses steel bushings which ensure free-play linkages operation.

Servo Saver

The servo saver features a key-lock system that ensures the servo saver will stay secured even during chassis flex in extreme conditions.

The centralized servo saver is ball-raced for super-precise and smooth operation, with an adjustable spring collar for fine tuning of the preload. The servo saver also features easily adjustable Ackermann positions that greatly influence the steering characteristics, allowing the RX8 to be tuned for all driving styles and track conditions.

Bumper

The front lower bumper features extra body mount positions to fit all popular racing bodies. The aluminum front body posts use eccentric mounting for front/rear mounting positions.  

Bulkheads

New front left aluminum bulkhead features stronger M4 set screw mounting of the muffler, for a more secure and reliable mounting. The aluminum stand for 2nd speed shaft was redesigned and includes attachment of the carbon plate for the middle belt tensioner. Rear suspension holder was also redesigned and is mounted with M4 set screw for secure mounting.

Front Anti-roll Bars

To improve out of the box performance in all standard racing conditions, the choice of the anti-roll bars was revised with the front 2.4mm and rear 2.6mm anti-roll bars and appropriate roll bar bushing sizes.

The anti-roll bars have a shape to match the bearing bushings. Mounting the fixed front anti-roll barholders without the eccentric bushing makes the down-stops easier to set.

Rear Anti-roll Bars

To improve out of the box performance in all standard racing conditions, the choice of the anti-roll bars was revised with the front 2.4mm and rear 2.6mm anti-roll bars and appropriate roll bar bushing sizes.

The anti-roll bars have a shape to match the bearing bushings. Mounting the fixed front anti-roll bar  holders without the eccentric bushing makes the down-stops easier to set.

Shock Springs

To provide a perfect feeling out of the box for most standard track conditions, the included shock springs are the C7.5 springs in front, and C5.6 for the rear. The C7.5 provides maximum stability, and at the same time more steering into the corner.

The RX8 springs, like all the other XRAY springs, are manually measured, selected, and matched into pairs to guarantee precisely equal length and tension characteristics.

Wheelbase

The rear aluminum bulkheads have a 2mm wheelbase adjustment for the lower and upper arms for easy traction tuning.

Wheelbase can be easily adjusted using clips on the front suspension. Moving the arms towards the front or rear can also be used to fine-tune weight balance.

Suspension Holders

The rear suspension holders are mounted with 2 large screws instead of 4 small screws for maximum reliability. The holders’ lowest position is very low, to help generate the most amount of traction when needed. The chassis provides adequate clearance for this low position. The rear wheelbase setting is adjusted by moving the upper and lower arms along the long suspension holder pins.

Long rear suspension holder pins for upper and lower suspension allow moving the position of the rear arms for a rear wheelbase adjustment.

The front & rear lower suspension holders are fully independent from the bulkheads, mounting directly to the chassis to maximize traction and make the car easier to drive.

The suspension mounts are CNC-machined from premium Swiss 7075 T6 aluminum to provide the lightest & strongest framework for the car.

Front Upper Arm Holders

The lightweight front upper arm holder features an additional flex setting by connecting the holder to the front bulkhead from the side to reinforce the assembly. The upper arm holders use the smaller eccentric bushings and spacing shims from the NT1 for a more compact design to create the space to lower the radio tray height and reduce the overall CG.

Fuel Tank

The XRAY fuel tank uses the well-proven leak-free, super-durable cap from the NT1.

The 125cc fuel tank with hypertonic tank lid and internal stone-type filter is positioned in the center of the car and sits as low as possible.

The internal baffles inside the fuel tank ensure that fuel will always be in the area around the fuel line intake so even in long, fast corners the fuel will be constantly supplied to the engine. 

PUR® Drive Belts

To increase the reliability and strength, the rear drive train features a wide 9mm PUR belt.  The PUR®-reinforced high-efficiency low-friction drive belts ensure that power is properly and efficiently transferred to all drivetrain parts.

Rear Uprights

The rear uprights are molded from a hard composite mixture to maintain proper suspension geometry and to provide maximum stability and accuracy.

The hard composite mixture used for the rear uprights keeps geometry consistent even in the harsh track conditions found in 1/8 racing. This provides maximum stability and accuracy.

The small, compact rear uprights are very strong due to this special composite mixture. Thanks to perfect molding, bearings fit into the rear uprights without any extra play, giving maximum stability and handling.

The rear uprights can use the optional carbon aerodynamic disks that can increase rear traction and stability in high-speed corners.

The rear uprights feature two easily adjustable upper roll center positions that are used for traction adjustment. The uprights also feature two body mount adjustment positions depending on the type of body used. Short and long pivot ball joints are also included for optimum set-up adjustment.

Pivot Balls

Long front lower pivot balls are used to offset the narrow front suspension pivot point to retain full width adjustments.

The RX8 pivot ball suspension contains precision pivot balls that are specially hardened to better withstand harsh crashes and extend their lifespan. A total of eight (8) pivot balls are included and are captured by strong M10 composite nuts to minimize weight and give smooth suspension movement.

Standard pivot balls are made from steel for maximum durability and lifespan. For those who are focused on minimizing unsprung weight, optional lightweight aluminum and titanium pivot balls are available.

Receiver Box

The lightweight shape receiver box is ultra-compact and can be positioned as low as possible and close to the chassis centerline for the best possible weight distribution.

Shock Absorbers

Shock bodies are CNC-machined from premium Swiss 7075 T6 aluminum and hardened to ensure maximum lifespan. External fine threading allows for quick & easy ride height adjustment. The shocks feature low-profile membranes for super-smooth, precise damping.

The set of pistons includes 2- and 3-hole pistons with 1.0, 1.1, and 1.2mm diameter holes. The pistons are precision molded from special Delrin™ material to ensure perfect roundness for extra-smooth dampening, while maintaining maximum stiffness and durability.

Pivot Pins & Turnbuckles

Pivot pins for rear upper & lower and front lower suspension arms are designed to fit aluminum suspension mounts. Rear upper pivot pins feature a machined groove that allows better fixing by set-screw, helping to prevent pins from coming out during operation.

To guarantee maximum reliability, all turnbuckles are manufactured from special HUDY Spring Steel™ material for turnbuckles for maximum core strength.

Pulleys

All pulleys are molded from a special composite mixture to ensure low-friction operation, efficient and strong tooth profiles, and long lifespan. Pulley covers feature self-cleaning holes.

Spur Gears

The small 2-speed allows the use of smaller spur gears from the well-proven NT1, allowing fast acceleration and low rotating mass.

The spur gears are made from graphite material for improved durability. The special graphite material is also very light which helps to decrease the weight of rotating parts for improved acceleration.

The spur gears are molded with a special technique allowing the gears to be absolutely true, thus improving the drivetrain efficiency. Each gear is stamped with a tooth number for easy identification.

Pinions

The RX8 includes pinion gears specially designed for 1/8 on-road cars; but using the same pitch as NT1 for more smooth and improved transmission efficiency.

The pinions are machined from tough 7075 T6 aluminum and specially hardcoated for superior strength, light weight, and high durability. Created on a special gear machine, all pinions feature ultra-precise tooth shaping and ultra-true running for vibration-free operation.

Fine internal threading allows easy installation on XCA clutch bells (standard or lightweight versions), and each pinion is fine etched with the tooth number for quick & easy identification.

Suspension Geometry

The RX8 features the most advanced, race-engineered suspension geometry for nitro on-road car racing and is designed to provide responsive racing characteristics under all racing conditions.

Over the years XRAY has successfully gained and utilized extensive suspension geometry knowledge and self-developed suspension stiffness technology, which have been used with great success in electric & nitro cars, both on- and off-road. The ultra-lightweight suspension parts are molded from special composite materials that make the parts very light yet very durable to withstand the rigors of high-performance racing.

Integrated Suspension Settings™

The RX8 integrated suspension settings I.S.S. now uses in the front upper arm holders the smaller and lighter eccentric bushings from the NT1 platform. All adjustment possibilities are completely integrated, allowing complete set-up changes without changing or replacing suspension holders or plates.

The use of square eccentric bushings in the front bulkheads, as well as in the rear bulkheads for upper & lower suspension, allows for complete geometry adjustment. Roll centers are adjustable in the standard upper & lower positions, as well as in inner and outer positions. High-tensile steel suspension pivot pins are polished for smooth suspension action.

Adjustable Axle Height

Front steering block and rear uprights feature concentric and eccentric bushings which allow roll center adjustment as well as positive caster adjustment in front. The eccentric bushings in the rear upright also allow independent wheelbase adjustment. The height of front and rear axles can be easily adjusted with eccentric bushings.

Offset Adjustment

Wheel offset is easily adjustable by 0.5–2.5mm using included shims. This affects steering adjustment (when adjusted at the front) and also rear traction characteristics (when adjusted at the rear).

FRONT - Less offset at the front gives more in-corner steering and improved steering response. Recommended for small technical tracks.

More offset at the front gives more stability and makes the car easier to drive on large tracks or under high-grip conditions.

REAR - Less offset at the rear gives more in-corner steering, but less rear traction and stability. Therefore it is recommended to use less offset on small technical tracks or under high-traction conditions.

More offset at the rear makes the car more stable and improves cornering speed.

Battery Holder

The receiver battery pack can be easily removed from below the fuel tank by a quick access composite cover at the bottom of the chassis. Optional graphite cover contains a special CNC-machined pocket in which the batteries are placed, allowing the batteries to sit as low as possible.

The main feature of the graphite cover is its integrated Multi-Flex Technology™ functionality to additionally reinforce the chassis in the vertical plane.

The optional graphite cover is also recommended for use with a LiPo receiver pack. An optional brass battery holder adds weight to the bottom of the car.

Multi-Flex Technology™ allows the mounting of the optional brass or graphite battery holders either affixed directly to the chassis or mounted independently from the chassis.

Silicone Oils

HUDY Exclusive Silicone Oils are manufactured in Europe and each batch is laboratory tested and calibrated to ensure the highest possible consistency and quality from batch to batch. Based on the industry-standard cSt rating, the new line of oils will be easy to identify, adjust, and feel.

When following any set-up sheets by XRAY or XRAY team drivers, you can be sure that the oils you will get for your car are exactly same as those used by the factory racing team, thus ensuring very exacting set-ups and handling.

HUDY Chem Series.

Ball-Bearings

The RX8 is fully ball-bearing equipped and features high-speed, blue-sealed ball-bearings throughout the drivetrain for maximum drivetrain efficiency. The high-tolerance, high-performance bearings are degreased and lightly oiled with Aero Shell Fluid 12™ for maximum smoothness and long life. The main ball-bearings are oversized with extra-strong bearing frames to ensure smooth, efficient running even under extreme conditions.

Chassis Balance

The chassis design focuses on balanced weight distribution and weight transfer. The chassis features pre-drilled holes for additional weights for optimum car balancing. Centerline holes are pre-drilled for easy balancing with the HUDY Chassis Balancing Tool #107880.

Adjustment Possibilities

The RX8 features fully-adjustable front and rear suspension geometry: caster, camber, toe, ride height, droop, track-width, Ackermann, roll centers and weight balance. For quick & easy adjustment, we recommend using set-up tools and accessories from HUDY, the world leader of RC tools.

• Brand: XRay
• Part No: XR340010
• Barcode: 8581703400103
• Scale: 1:8
• Power Source: Nitro
• Surface Type: On Road
• Vehicle Type: Touring / Rally Car
• Build Level: Unassembled (Kit)