XRay X12 2026 Tweak-Free Racing Car Kit XR370022

XRAY X12 2026 All-new Features

• Redesigned chassis with reduced rear flex improves stability & overall traction
• Chassis adds mounting holes for a floating servo mounting and additional holes for easier access to rear pod hardware
• New pod front plate and carbon side link plates with 3 positions provides proper side link alignment for each of the center pivot positions
• New side link mounting positions keep the side links’ rear pivots in-line with each of the three center pivot positions to minimize bind during suspension compression.
• Redesigned front carbon bumper improves durability
• Front brace from thinner 1.6mm carbon material improves handling & overall feel
• New aluminum pivot holders allow a lower roll-center setting without protruding below the chassis
• Two servo mounting alternatives - fixed & floating
• All-new floating servo holder provides more forgiving handling and minimizes steering drift due to servo movement after a crash
• Improved center dampener sealing eliminates oil leaking
• Wider front lower arm - 1mm per side - improves drivability in all conditions 

Chassis

All-new chassis design reduces flex in the rear of the car, improving stability and overall traction. The chassis also features holes for a floating servo mounting, and additional holes for easier access to the pod hardware.
The one-piece chassis design provides.

The chassis concept integrates with the front Tweak-Free Suspension and the rear Tweak-Free POD System to maximize performance.

The chassis plate’s edges are beveled for less drag on the track surface during cornering to improve handling and efficiency.

Special cut-outs for optimal flex characteristics.

The standard chassis is CNC machined from 2.0mm Swiss 7075 T6 aluminum.

Rear POD

The 2-piece rear pod concept is positioned above the one-piece chassis plate. As part of the new pod assembly, the pod plate controls the droop setting along with a pod angle adjustment and supports the side springs. The new rear spring location improves forward traction and lowers CG while offering better adjustability.

The new configuration controls the pod droop adjustment using the rear bump spring. The new composite spring adjustment nut is compatible with both linear and conical springs for maximum versatility and adjustment choices.

The pod angle adjustment is a new setting for fine tuning handling; controlled by a set screw at the rear of chassis.

The POD assembly includes aluminum bulkheads and carbon fiber upper and lower pod plates. The pod mounting system improves traction and stability, while also reducing tweak issues after crashes.

The rear carbon fiber upper pod plate uses new super lightweight composite bushings instead of locknuts to save weight, lower CG and improve the clean look of the car. The upper plate mounts to the bulkheads with 4 centering pins and 2 screws to keep the assembly in proper alignment and minimizing the chances of tweak after an impact on the track. 

Side Link Mounting System

New carbon front mounting plates for the side links have three mounting positions matched to the pod front plate. This new adjustment allows the side link rear pivots to remain in-line with all three center pivot locations - Forward/Middle/Rear, reducing bind during suspension compression and improving handling and dynamics.

The narrow and light side link stands and M2.5 screws maintains a low weight. The side link stand features a 2-pin design for maximum rigidity & tweak resistance.

The carbon fiber side link plates integrate with the aluminum holders‘ 2 locating pins for accurate, reliable alignment.

Roll Center Adjustment

All-new aluminum pivot holders allow a lower roll-center setting without protruding below the chassis.

Low center pivot holder controls POD movement and roll center adjustment. A small diameter pivot ball allows for the low roll center options, and the forward center pivot position provides maximum adjustability.

The aluminum Tweak-Free Pod Mounting System improves traction and stability and reduces tweak issues after crashes. The system allows for a significantly lowered roll center, lowered center of gravity, and pivot height adjustment using various shims.

Pod Mounting System

All-new lowered center pivot holder controls POD movement.

Forward – The most forgiving handling; car can be driven more aggressively without fear of losing rear traction.

Middle - Balance between front and rear traction and well suited for most conditions. 

Rearward – Improved rotation from the shorter rear pod geometry. Provides more initial steering as well as rotation which is best suited for high traction carpet.

Bumper Holder

Redesigned front carbon bumper adds material in critical spots to improve durability.

The carbon fiber front bumper holder aligns with the chassis shape and provides maximum protection in crashes and perfect body shell support. The IFMAR & EFRA legal size ensures maximum aero efficiency and has a perfect fit with the 3D printed bumper.

The front bumper design and size is designed to meet the latest racing organization rules.

Machined from premium 2.5mm carbon fiber, the brace is flexible yet rigid enough to withstand serious crashes.

Front Suspension Brace

A thinner 1.6mm carbon front brace is included in the kit to improve handling & overall feel. The increased flex in the front suspension makes the handling more forgiving while also improving mechanical grip. This is especially noticeable mid corner with faster transitions from corner entry to exit.

Servo Holders

A new mounting option give two different servo installation choices – fixed or floating. An all-new floating servo holder provides more forgiving handling and reduces the risk of servo movement in a crash. 

Center Shock

All-new center shock provides exceptional bump handling, low maintenance, and helps lower CG. The spring-free design significantly reduces weights and the 1-hole piston configuration ensures consistent handling over bumps.

The center shock features a hard anodized aluminum shock body for great durability.

A silicone shock O-ring seals the dampener for super smooth operation while preventing oil leakage.

The ultra-finely finished shock shaft with the precision-molded composite shock piston creates optimum oil flow and smooth shock absorber action.

Lower Suspension Arm

The new front lower arm is 1mm wider on each side to improve drivability in all conditions.
The carbon fiber front lower suspension arm plate is designed to match the chassis & geometry.

Aluminum lower arm pivot balls are included in the kit for overall weight savings, while importantly removing weight from the nose to shift the weight bias to a more centralized position.

The super lightweight alu pivot balls have reduced weight by 63% compared to steel balls.
 

Standard Features

Some information shown below may include details from previous kits, and it may vary slightly from current kit specifications.

Front Suspension Flex Settings

The Tweak-Free front suspension features a front brace system for a fast steering response and high cornering speed. The design incorporates a flex adjustment system with three different settings for various track conditions.

Soft – the brace is not mounted to the front arm plate – This option makes the car initially less responsive but will provide more mechanical grip. Best suited for low grip carpet conditions and asphalt.

Medium – the brace is mounted to the front arm plate by small posts that raise the brace and make the front suspension stiffer – Gives a good balance between initial response and mechanical grip. Best option for most conditions.
Stiff - the brace is mounted to the front arm plate by small posts that raise the brace and make the front suspension stiffer, and another identical brace is mounted underneath the small posts for added rigidity. Improves steering response compared to the two softer options, without giving away front grip. 

Bulkheads

New lightweight aluminum bulkheads help lower CG as part of the new POD assembly, with the left side bulkhead adding a cooling fan mounting provision.

The bulkheads’ design minimizes weight and lowers CG to improve stability. Centering pins help align the carbon fiber plates with the alum bulkheads to reduce tweak issues in serious crashes for maximum reliability.

The bulkheads use compact eccentric bushings with fine adjustment increments for perfect ride height control while maintaining a low center of gravity. The compact ride height eccentrics allow for compact bulkhead dimensions to reduce weight and a lower CG.

The carbon fiber rear brace is thin and light, continuing with the efforts to maintain the lowest possible CG while controlling pod flex. The rear brace mounts to the bulkheads from the top with a single mounting point to improve tweak resistance.

Snap Lock™ Bushings

All-new super smart XRAY Snap Lock™ Bushings replace locknuts and aluminum bushings. The 14 super small bushings reduce weight and stay securely held in place after installation for easy chassis assembly and maintenance.

Rear Assembly

The new rear carbon fiber side spring brace utilizes composite bushing inserts pressed into the plate at the hardware attachment points for easier assembly and maintenance.

The rear plate location maintains the super low CG focus, improving stability and handling consistency. It also contributes to chassis rigidity and tweak resistance in crashes. The side tubes are top mounted for quick assembly and maintenance.

The rear brace provides mounting locations for the battery backstop.

The side braces are mounted as low as possible, improving stability and consistency on the track. 

Dampening

All-new rear POD spring replaces the center shock spring. The POD spring improves forward traction, expands adjustment possibilities, and lowers CG.

The spring holder accommodates both conical/progressive and straight/linear springs.

To ensure best handling for most conditions when using the standard solid axle, the included soft rear conical/progressive spring provides a balanced starting set-up out of the box.

Kingpins

All-new hollow front kingpins improve lubrication of the front suspension while the nickel coating contributes to even smoother and damped suspension movement.

4mm kingpins provide the foundation for the Tweak-Free Front Suspension. The kingpin’s strong design with machined camber angle provides precise geometry and handling.

To match typical track conditions, the kit is delivered with standard 1.0° degree kingpins.

A complete range of 0.5°, 1.0°, 1.5° camber kingpins are available to adjust the camber in fixed steps.

Steering Blocks

All-new aluminum steering blocks have special factory pre-pressed Teflon inserts for minimal friction and smoother dampening. All-new Ackermann positions improve steering characteristics.

The steering blocks are machined from lightweight Swiss 7075 T6 aluminum material.

Side Braces

All-new thinner side braces purposely designed to accommodate the new chassis profile for enhanced chassis stiffness. The narrow width saves weight and creates more space for electronics.

Braces use new thinner M2.5 posts and screws for additional weight savings and remove weight from outer perimeter locations for improved rotation.
The thinner side braces increase overall traction, making the car more forgiving on the track. Optional 1mm thick braces are available for improved performance in lower traction conditions.

Multi-flex positions for the side braces allow for extra fine tuning of the chassis flex to improve steering response and cornering speed.

The side brace mounts feature an ultra-low CG design to improve the stability of the car.

Carbon fiber side braces are mounted to the rear link brace and to the chassis via composite posts, offering multi flex adjustments - which is four in total – different flex setting alternatives to alter the chassis stiffness for different track conditions.

Battery Holder

All-new forward battery position and backstop provide for more consistent handling and improved cornering speed.

The chassis plate is narrowed in the battery area to make it easier to quickly remove the battery from the car.
The battery mounting system provides simple and reliable battery installation. The front battery stop is mounted to the chassis and can be moved in 2mm steps forward or backwards. The system eliminates the chance of the battery shifting forward in a crash, and it is centered by the shock post to prevent the battery stop from shifting sideways.

The adjustable battery holder system secures the battery in the car in a tweak-free, non-fixed manner to improve traction with more consistency, ultimately making the X12 easier to drive.

The battery holder allows for a wide range of battery placement adjustments with 5 battery mounting positions.

To match the size variations of different battery packs, use a thinner backstop shim to remove extra play, and use a thicker shim if more clearance is needed.

Frontward-placed battery:

• makes the car easier to drive
• reduces wheel lift in corners
• makes the car more predictable over bumps

Rearward-placed battery:

• makes the car more aggressive
• increases cornering speed
• makes the car more difficult to drive

Rear Hubs

All-new narrower and lightweight rear wheel hubs have significantly reduced rotating weight, provide more secure installation on the rear axle and improve track width adjustability.

Lightweight wheel hubs with M2x5 screws minimize rotating mass and vibrations.

The aluminum rear hubs are machined from lightweight aircraft aluminum and black-coated for a stylish look. The aluminum wheel hubs feature a center-balanced clamping mount system, ensuring secure mounting while eliminating vibration and run out.

Rear Axle

The ultra-lightweight steel solid axle is shorter to accommodate narrower wheel hubs. The solid axle ensures exceptional drivability and throttle response. The hollow solid axle is extremely light and durable, with a steel material that minimizes flex and makes the car more predictable to drive.

The hollow steel construction is extremely light and more durable than a carbon fiber axle. The steel material minimizes flex, making the car more predictable to drive, especially in the Modified class.

Race proven ball differential is still available as a tuning option if needed for low traction situations.

The rear differential features high-grade precision carbide balls in the spur gear, hardened and precision-ground D-steel shims, and premium carbide axial thrust-bearing.

3D Printed Bumper

3D printed bumper – gives better support to the front of the body shell, improving aerodynamic efficiency. The 3D printed material doesn't fold or break, and by allowing more airflow under the body it also helps improve front grip.

3D printed with high quality materials for very light yet very strong properties.

Read more >

Side Spring Retainers

New side spring retainers, made from steel instead of composite, produce more precise and more consistent side dampening action.

The improved side spring fitment made possible by using the steel material is responsible for the improved suspension characteristics, while the metal components also improve durability and aesthetics.

Side Brace Flex Settings

Soft – no side braces – This option will make the car generate more mechanical grip. Best suited for low to medium grip carpet, as well as asphalt.

Medium – side braces are mounted to the rear graphite brace and to the middle of the chassis – A good compromise between mechanical grip and steering response. A good starting setup for most conditions.
Medium stiff - the side braces are mounted to the rear graphite brace, to the middle of the chassis, and to the middle-front of the chassis – A good compromise between mechanical grip, and steering response. A good adjustment as grip levels approaches high traction.

Stiff – the side braces are mounted to the rear graphite brace, to the middle of the chassis and to the middle-front and front points of the chassis. – The stiffest, and most stable option. Best suited for high grip carpet. This setting allows less roll and will reduce overall grip.

Rear Ride Height

The alu bulkheads allow for very quick & easy ride height adjustment using eccentric axle holder bushings. The axle height is adjustable in 0.25mm increments over a 2.5mm range for ride height fine tuning.

Differentials

An ultra-light weight steel solid axle is included in the kit for improved drivability and throttle response.

The hollow steel construction is extremely light and more durable than a graphite axle. The steel material minimizes flex, making the car more predictable to drive, especially in the Modified class.

With the new platform in 2021, the X12 was designed with the use of a solid axle in mind to achieve maximum performance. For 2023, both the EU and US Editions include the new solid axle as this has become the standard for most conditions worldwide.

Our race proven ball differential is still available as a tuning option if needed for low grip situations.

The rear differential features high-grade precision carbide balls in the spur gear, hardened and precision-ground D-steel shims, and premium carbide axial thrust-bearing.

Servo Position

Unique & innovative fully-adjustable servo mount allows easy adjustment of the servo position. The servo is attached to independent mounts that are mounted using a groove in the chassis. Depending on the size of your servo, you can easily install and adjust the servo and its position to the center of the chassis.

Front Wheelbase

The X12 chassis features XRAY self-developed front wheelbase adjustment possibility. The chassis has two positions for front suspension mounting; the whole front suspension can be easily moved by 2mm frontwards or rearwards.

The long wheelbase is the same wheelbase as previous X12 cars, and is recommended for larger tracks or tracks with longer sweepers. A long wheelbase works well at low-to-medium traction tracks when more stability is desired. Also better suited to the Open Modified classes to make the car smoother and less twitchy.

The short wheelbase allows the car to rotate better in the middle of the corner to maintain cornering speed. Recommended for tight, technical tracks or tracks with numerous hairpin corners. The short wheelbase works well at medium-to-high traction tracks where a lot of steering is needed. Also better suited to the Stock and blinky classes.

Front Ride Height

The front suspension uses ride height adjustment shims for very quick, precise, and hassle-free ride height adjustment depending on track conditions. The set of 0.2, 0.4, and 0.6mm ride height adjustment shims are included for fine tuning. 

Side Tubes

Lateral damping side tubes provide ultra-smooth side damping, making the car easier to drive and easier to work on. The outer aluminum tube and inner Delrin® tube operate ultra-smoothly.

Servo Saver

The XRAY servo saver has become the industry-standard saver and remains unchanged and is included.

Several linkage mounting positions are offered to make the steering linkage adjustment easier. The servo saver consists of 4 springs which makes the servo saver strong enough to provide the precise steering racers demand, while still being flexible enough to prevent servo damage in hard crashes. The servo saver has interchangeable bushings to fit most popular servos.

Spur Gear

Precision-molded spur gears are made from XRAY's exclusive composite material, ensuring true running, super-quiet operation, and robustness for handling powerful motors. A range of optional spur gears for fine tuning is available.

Gear Differential

The optional XRAY self-designed, revolutionary, super-smooth gear diff is a direct replacement for the ball-differential.

Using the optional gear differential makes the car more stable and easier to drive, especially in high-traction conditions. The gear diff increases on-power steering which is needed on almost all types of tracks. A “must have” for every racer.

The complete gear differential set includes a composite case and cover, precision-molded internal satellite gears made from special XRAY-developed composite material, all ensuring long lifespan and super-smooth efficient operation. A super-strong hollow steel shaft ensures maximum reliability and strength.

The advantage of the gear diff is that it is maintenance-free. When the diff is correctly built, there is no need for maintenance for a very long time, no need for frequent oil changes, and no leakage due to a superior sealing system.

Body Posts

Robust body posts with fully-adjustable body holders; optional super-fine +1 or +2mm body backstops available optionally for even more super-fine body height adjustment. 

Weight Balance

The layout of the electronics and position of individual sections of the car were designed with optimum weight distribution and balance in mind.

The steering servo is located in a lay-down position for lowest CG at the chassis center, and the layout of the chassis allows the batteries to be placed either cross or inline.

Depending on battery configuration, the ESC and receiver can be placed in various positions for ideal weight transfer and balance.

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.

Pivot Balls

High-precision, HUDY Spring Steel™ upper pivot balls and composite lower pivot balls ensure smooth & precise movement of the front suspension.

Fully Adjustable

Fully adjustable front camber, caster, toe, droop, front wheelbase and Ackermann; front offset & rear track-width; bump steer; front & rear ride height; front & rear springs; rear shock damping & spring; pod damping and droop;  pod weight balance; battery position; servo position and chassis tweak.

Tech Tip Videos

To get the finest tips & tricks on how to build the X12 or to learn more about each of the set-up options, follow the series of XRAY X12 Tech Tip videos featuring Alexander Hagberg. The videos walk through each section of the building process with suggested assembly techniques, demonstrations, and detailed explanations of the various setup adjustments.

Chassis Weight Balance

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

• Brand: XRay
• Part No: XR370022
• Barcode: 8581703700227
• Scale: 1:12
• Power Source: Electric - No Motor
• Surface Type: On Road
• Vehicle Type: Touring / Rally Car
• Build Level: Unassembled (Kit)