The all-new XB8…an icon of unequaled
reliability & outstanding performance.

“To bring the XRAY 1/8 off-road platform to an all-new level, we had to let go of everything traditional and adopt innovative approaches without considering any limitations.


I am very happy and proud to present to you the most advanced 1/8 off-road car ever designed. Long-term tested in various conditions by some of the world's best drivers, and made with the artistic craftsmanship of our in-house XRAY factory production specialists, the XB8 is simply the finest race car we have ever made.


Designed, developed, and fully manufactured in Slovakia, Europe with XRAY's legendary attention to the detail, fine materials and extreme performance, I am thrilled to present to you the all-new XB8."

Back to the Future

“Designing the new off-road platform brought me back in time to 1986 when I first designed and hand made my first 1/8 off-road car; it featured revolutionary pivot ball suspension with adjustable caster, camber, and roll centers. The performance & extreme durability of that car allowed it to win all of the races around.

Years later in 2004, XRAY’s truly first mass-production XB8 became one of the most successful off-road cars winning the European Championship title. This déjà vu inspired me with the idea to get back to the future with the all-new platform, to have it proudly bear the XB8 name to pay tribute and carry forward the winning heritage.”

XB8 Debut.

There is no other 1/8 off-road car that had such an incredibly outstanding prototype debut than the new XB8. Reno Savoya & Martin Bayer brought the very first prototype to its first official race – no less than the European Championship – and went on to give one of the most thrilling main final races in EC history. After leading the main final, Reno Savoya finished only 0.7sec behind the winner, with Martin Bayer finishing in a very close 3rd place, making it a double podium finish and one of the most successful prototype debuts ever.

STIFF Use the STIFF setting for high-traction tracks where a lot of steering and responsiveness is required.

The more screws used, the stiffer the car will be; the fewer screws used, the softer the car will be. Do not remove any screws other than those shown.

MEDIUM Use the MEDIUM setting for medium-traction tracks. This setting offers a good balance between steering responsiveness and traction.

SOFT Use the SOFT setting for low-traction, dusty tracks. The car will generate a lot of traction with this setting, but will have less steering and response compared to medium and stiff settings.

Chassis.

The chassis is CNC-machined from 3mm high-quality Swiss 7075 T6 aluminum, which is strategically machined in low-stress areas and then anodized to make it as light as possible without affecting strength or rigidity.

Non-essential material below the engine, fuel tank, and differential was removed to allow for the lowest possible center of gravity and appropriate chassis flex.

Weight distribution, chassis width, and chassis length have a key influence on the handling of the car. All of these features were incorporated into the design of the chassis.

All screw holes on the bottom of the chassis are countersunk, allowing for a very smooth chassis underside with no protruding screw heads.

Pivot Ball Suspension.

XRAY Pivot Ball Suspension XPBS™ is a uniquely innovative concept, and smart R&D design. The ultra-robust pivot ball suspension has integrated suspension geometry adjustment, with different kingpin plates being the only optionally-available tuning parts.


The complete integrated suspension geometry adjustment includes:

Steering Blocks.

XPBS™ steering blocks are unique, innovative, smart... an authentic XRAY innovation.


The steering blocks feature the following integrated geometry adjustments:

The steering block consists of a super-lightweight composite steering block and stiff Swiss 7075 T6 kingpin plate. The steering block is mounted via massive pivot balls into the upper & lower arms.

The upper pivot ball is mounted into an adjustable upper ball joint and via roll center shims to the kingpin plate; this assembly allows camber and upper roll center adjustment. Using shims of various thicknesses, the upper roll center can be adjusted quickly & easily.

The lower pivot ball is mounted into the steering block via an adjustable alu nut and composite bushing. By adjusting the pivot ball, both track-width and camber can be adjusted.

A higher roll center (more shims) is recommended for grippy, high-traction tracks as well as for bumpy tracks.

A lower roll center (fewer shims) is recommended for slippery and smooth tracks.

Rear Uprights.

The ultra-tiny XPBS^™ rear uprights are unique, innovative, smart… an authentic XRAY innovation.

The rear upright consists of a super-lightweight composite upright block and stiff Swiss 7075 T6 mounting plate. The uprights were designed to have the smallest design with minimal weight, yet be strong enough to survive rigorous impacts.

The upper roll center plate has a unique design that allows easy changing of roll center position. The roll center plate features 2 roll center positions, so by placing the plate the opposite way another 2 roll center positions for super-fine tuning are available. The roll center shifting is in range of 2.5mm. The roll center height of the upper camber link can be adjusted via shims of various thicknesses. The composite upright features 2 lower roll center positions.

The outer suspension pin on which the rear upright sits features 2 shims which allow for additional wheelbase adjustment.

The uprights feature integrated geometry adjustments including:

The front upper suspension is part of the innovative and unique XPBS^™suspension concept. Extra-strong and robust front upper arms are mounted to the front bulkhead assembly into the front shock tower and adjustable suspension holder. Using eccentric bushings, front inner upper roll center can be easily adjusted.

Caster is easily adjusted using caster clips which are inserted either in front or behind the front upper arms.

The ball link is inserted into the upper arm and the integrated adjustable turnbuckle can be accessed from outside for quick & easy camber link adjustment.

To reduce rotating weight, the super-lightweight diff outdrives are machined from HUDY Spring Steel™ which allows unnecessary material to be removed from the outer part of the outdrives to further reduce weight without affecting durability. The inner portions of the outdrives are additionally hand-ground for maximum precision and fitment into the diff case.

The outdrives are hardened using HUDY’s own special hardening process to provide extended life time and reliability.

High-Torque Clutch.

The high-torque clutch provides smooth and continuous transfer of power from the engine at high RPM. The clutch engages higher in the RPM range, resulting in more controllable power during acceleration, while still maintaining good handling and performance on jumps.

The Swiss 7075 T6 aluminum flywheel has a smaller diameter but heavier weight. The smaller diameter allows the flywheel to be more protected after landing large jumps, so there is a reduced chance for engine stoppages due to the flywheel contacting a rock or other obstacle. The flywheel’s heavier weight results in smoother and more balanced engine operation.

The Swiss 7075 T6 clutch shoes are small, lightweight, and designed for engagement during the entire travel of the shoe. The shoes are less sensitive to wear and as such their lifespan is increased.

The extra-tough flywheel nut is machined from Hudy Spring Steel™.

The clutch is equipped with soft clutch springs; optional medium and hard springs are also available.

The XB8 big-bore, long-stroke
shocks have a special construction that gives
ultimate reliability and performance.

These new shocks have had all parts fully redesigned and adjusted to take advantage of the big-bore design. The oversized big-bore shocks feature 18.5mm outer diameter shock bodies, externally threaded with an adjustable collar for quick & easy spring preload adjustment. The shock bodies are hardcoated in a titanium color and feature a 1-piece alu shock cap.

Ultra-precise shock pistons feature 6-, 8- and 10-hole options. The longer shock shafts and shock collar combine to give increased downtravel. Ultra-fine shock protective rubbers give superior sealing against dirt.

The large 16.0mm inner diameter of the shock bodies ensures proper and consistent shock oil flow through the perfectly-round pistons while they travel inside the smoothly-finished interior. The result is more consistent damping characteristics.

The big-bore pistons are molded from tough, well-proven Delrin® material to provide smoother action and durability. The precision molding production process ensures perfect roundness of the pistons after production, so that the pistons will move smoothly inside the shock bodies for identical action in all four shocks.

The specially-formulated rubber material of the shock membrane ensures equal damping characteristics from the beginning of the race to the end, even after extreme operation.

The lower shock assembly ensures that the shock rod will move very freely inside the shock body, while at the same time minimizing oil leakage and keeping dirt out. Two shock O-rings – manufactured from a superior silicone compound to allow ultra-free movement of the shock rod while still maintaining a tight seal – are installed in the lower part of the shock body and are secured with composite shims. The entire lower shock assembly is secured with the lower aluminum shock cap which makes assembly/disassembly very quick and easy.

Thick and robust shock shafts will handle any abusive racing conditions and big jumps. The 3.5mm thick shock shafts are precisely machined from special high-tensile steel and afterwards are ground for a super-smooth finish to ensure smooth movement of the shock shafts in the shock bodies.

Shock Springs.

XB8 springs have been specifically designed to complement the big-bore shocks.
These XRAY shock springs, like all other XRAY springs, are manually measured, selected and matched into pairs to guarantee precisely equal length and damping characteristics.


There are two types of springs offered:

Spring rate is constant during the entire spring compression. Springs with different spring rates are available as optional tuning parts.

Spring rate is not constant, but rather the spring rate progressively gets heavier the more the spring is compressed. As the car initially enters the corner, the spring works like a softer spring to provide maximum traction. As the chassis begins to roll in the middle of the corner, the spring rate progressively increases until it works like a stiffer spring which allows the car to maintain maximum cornering speed.

Ackermann is easily adjusted by quickly & easily changing steering link mounting positions on the steering plate.
Bump steer is easily adjusted by inserting shims between the steering plate and steering linkage.

Front Braces.

The stiffness of the front suspension is easily adjusted to accommodate the particular track traction, even if the traction changes during the race the stiffness is very easily adjusted.

For slippery and low-traction tracks, the front composite brace may be removed and an optional reinforcement alu stand connects the front upper deck to the radio plate. This configuration generates more traction.

For low- and medium-traction tracks, we recommend using the front composite brace only.

For high-traction and hard-packed tracks, both the front brace and reinforcing alu stand are recommended to make the front suspension extra stiff.

Rear Braces.

The longer rear chassis brace included in the kit increases stiffness in the longitudinal direction and gives the car more side flex.

An optional rear short chassis brace provides more longitudinal flex and reduced side flex.

The smart design of the car allows both long & short braces to be mounted at the same time which makes the rear of the car very stiff and is suitable for extremely large jumps to protect the chassis from deformation on landing.

Access to the center differential is super easy by releasing the upper deck with only 4 screws. The low center diff housing is sized to accommodate optional spur gears and the stands are lowered to keep the weight as low as possible and to allow smaller central diff gears to be used. The center diff housing stands hold the effective and race-proven brake system.

XRAY focused on the smallest details when designing the brake system. The laser-cut, precision flat-ground steel brake disk allows for fade-free braking in conjunction with the special high-grip brake pads installed on the laser-cut brake plates. The brake disk is small, slim, and very light. The precision hand-grinding allows true, wobble-free rotation. Brake inputs are transferred precisely to the brakes thanks to the rigid, high-precision machined brake cams. Both brake disk and brake pads are specially heat-treated for maximum lifespan.

The engine mount has been specifically designed to extend up to the front engine bearing to provide higher reinforcement of the chassis in the longitudinal direction and in jumps will minimize the bending of the chassis between the clutchbell and spur gear.

The fuel tank cap features a very strong spring which ensures the cap will always close after refueling, and the specially-designed rubber seal perfectly seals the fuel tank and ensures no fuel will leak outside .

The fuel tank is molded from a special composite mixture that ensures very high reliability and rigidity. The molded-in splashguard protects the brakes from fuel spillage. The tank is mounted with rubber grommets to absorb vibration, and small composite holders secure thick 5.5mm silicone fuel tubing. Gluing of the tank pieces is performed by a special self-developed robotic system that ensures maximum accuracy and precision in pre-heating and gluing.

Anti-roll bars used to stabilize the car are manufactured from spring steel material. The front & rear roll bars are easily mounted to the diff cases, and can be adjusted through adjustable linkages.

Anti-roll bar wires of different thickness are optionally available for fine-tuning your set-up.

The XB8 includes premium HUDY Graphite Grease - a high-performance, advanced-technology semi-fluid lubricant which incorporates both extreme pressure additives and finely-dispersed graphite for load carrying. HUDY Graphite Grease is intended primarily for the lubrication of rotating parts and loaded gears. In addition to providing outstanding load carrying, it is formulated to have excellent adhesion and resistance from "flinging off" under extreme conditions. HUDY Graphite Grease reduces wear and increases parts life.

Wing.

The stylish and effective rear wing was designed to provide the appropriate amount of downforce and generate required stability for the car. Made from a strong special composite mixture, the wing was designed to survive severe abusive and extreme crashes while keeping its shape.

Rear wing holders are made from a special composite mixture to withstand abuse and crashes, and feature several different wing mounting positions.

Body Sealing.

The rear suspension arms feature pre-drilled holes where optional mud guards can easily be installed. The lightweight mud guards protect the rear drivetrain in wet and dirty track conditions.

The extensive and impressive range of adjustment possibilities includes: