“Having been with XRAY since I started racing, I know first-hand the total commitment of the entire XRAY team - R&D, racing team, support team, everyone - when it comes to their ongoing dedication to continually improve their products and bring the absolute best performance, service, and support to the world.

This year XRAY stands at the top in the 1/12 class again, with the well-deserved achievement of being back-to-back 10x European Champions in the modified class.

I thank XRAY for their belief in me, and the support they have given me. I am very proud to bring home these victories for our team.”

Alexander Hagberg

European Champion 2014, 2015, 2016, 2017, 2018, 2019, 2020 & 2023

Since its debut, winning the ROAR National Championship title, the US team continues on-going development of the US Edition to ensure that the X12 will remain a top competitor on tight, technical, high grip tracks typically found in North America, highlighted by winning the modified class at the 2020 ROAR Carpet Nationals. All of the latest improvements tested by the team are incorporated into the all-new X12 US Edition.

The new one-piece chassis design provides more consistent handling in all track conditions.

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.

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. 

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.

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. 

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.

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.

All-new lowered center pivot holder controls POD movement and roll center adjustment. A smaller diameter pivot ball allows for a lower roll center location if desired, with the new forward center pivot position providing 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.

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.

The carbon fiber front lower suspension arm plate is re-designed to match the new chassis plate and improves the front suspension geometry. The arm plate is 1mm narrower per side for improved initial steering and better track width adjustability.
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.

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.

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.

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.

The narrower and lighter side link stand and M2.5 screws reduce the weight. The side link stand features a 2-pin design for more rigidity and increased tweak resistance. The POD linkage angle adjustment provides additional fine set-up tuning.
The carbon fiber side link plates integrate with the aluminum holders‘ 2 locating pins for accurate, reliable alignment. The side link plates feature 3 positions for the side links‘ front pivot for maximum adjustability.

Changing the side link’s front pivot position will quickly alter the handling and feel of the car. The inner mounting position provides the most aggressive handling, with the most mid corner steering. The outer hole will give the most neutral handling. The middle hole, which is in between the two in terms of balance, is the best starting point for most conditions.

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.

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

New carbon fiber front bumper holder aligns with the new 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 long front bumper support provides sufficient reinforcement for the body shell and maximum aerodynamic efficiency.

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.

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.

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.

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

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 >

The side spring retainers, made from a steel material, feature a precise and consistent side dampening action.

Read more >

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.

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. 

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.

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.

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.

To get the finest tips & tricks on how to build the X4 or to learn more about each of the set-up options, follow the series of XRAY X4 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.

XRAY Instruction Manuals have become the industry standard; they are simply the best manuals you will ever get with an RC model car. Whether you are a first-time builder or an experienced racer, all instructions are straight-forward and easy to understand. The full-color Instruction Manual contains large 3D illustrations that show all assembly details in the easiest and most comprehensive manner.