Based on the ultra-successful XB8 platform, XRAY proudly presents the 2017-spec XB8E which incorporates the latest improvements and refinements gathered by the team, race-proven in the highest competition races around the world.
With my long-time experiences with 1/8 off-road racing, combined with the expertise I have gained from the R&D process at my previous projects at XRAY with XB2 and XB4 platforms, I have incorporated all the improvements & refinements to the XB8 platform to make it better, easier to work on, and more reliable. The all-new XB8E is based on the XB8 platform sharing all the finest features and specs you will really love.
XRAY XB8E Designer
The XB8E is typical XRAY: premium, professional, high-competition for the most demanding racers, developed with attention to the smallest details, and backed by premium service & support…a luxury masterpiece.
Designed in virtual reality using the world's most sophisticated CAD tools, and manufactured using the world's best machining and molding machinery, the XB8E achieves a level of premium perfection in all details that is second to none.
Read my exclusive story about the making of the all-new XRAY XB8 here for an insider’s view of our daily work as RC car designers and what we have all done to make the new XB8 a reality.
XRAY XB8 Designer
The craftsmanship, durability, and performance of XRAY kits have become legendary. Be part of the family, live the heritage.
“I designed and hand-made my first off-road cars back in 1986, and they were dominating the races thanks to unbeatable reliability and best performance. Years later in 2004 we have started our first mass production XRAY XB8 platform followed by the E version based on our long-term experiences, knowledge, and R&D expertise gained over decades, taking over the heritage I brought with me. Since the release of the XB8 platform, we have continued our dedicated work to refine the platform annually to bring the latest improvements & innovations to make the XB8E stand out in crowd and take you to the Winners Circle.”
Dipl. Eng. Juraj Hudy
XRAY Chief Designer
With countless wins in multiple classes at local, regional, national, and international levels, XRAY has become the standard by which all other racing cars are measured.
"The XB8E'17 is another great vehicle platform from the Xray line, the quality, performance and handling are second to none. The buggy is very durable and gives me the confidence I need to win races on very demanding tracks like The NEO Race."
Designed, developed, and fully manufactured in-house at the XRAY factory in Slovakia, Europe, using the most high-tech German & Swiss machines and premium European materials, crafted with XRAY's legendary attention to detail by our artistic production specialists. The XB8E is truly a masterpiece.
The all-new, high-volume differentials were redesigned to increase diff reliability and performance. Differentials feature higher oil volume capacity cases, and all-new larger internal gears with more teeth for improved differential moment.
The larger volume of the differential and the shape of the gear teeth reduce oil overheating. To increase reliability, diff pins have a new, stronger design.
The new differentials give increased traction and reliability, especially in long runs.
All-new internal diff gears were created to increase differential reliability and reduce diff oil overheating. The new 20T and 10T gears have a larger size and a greater number of teeth to ensure more precise fitment and engagement.
Pressed-steel differential bevel and satellite gears are heat-treated and machined for superior precision and smooth operation.
Updated diff outdrives were created to accommodate the new stronger diff pins. The front longer diff outdrive adapters ensure that the drive shafts will not fall out in extreme crashes at full steering lock.
To reduce rotating weight, the super-lightweight diff outdrives are machined from HUDY Spring Steel™ which allows unnecessary material to be removed 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.
All outdrives are hardened using HUDY’s own special hardening process for extended lifespan and reliability.
New trailing-axle steering blocks offer a significant handling improvement in all track conditions, making the car easier to drive and giving increased forward traction.
The smart design of the steering block allows one steering block to be used either on left or right side for easy servicing.
The steering blocks feature the following integrated geometry adjustments:
• bump steer
All-new steering plates change the front suspension geometry and thus change steering characteristics as well. The new updated geometry results into more linear and precise steering, making the XB8E more predictable and easier to drive.
To increase servo saver reliability, especially in dusty conditions, the all-new servo saver is moulded from new graphite material which is more resistant and efficient in dusty conditions.
The dual-arm steering system is simple yet effective, featuring an integrated easily-adjustable servo saver and Swiss 7075 T6 aluminum steering plate.
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.
The front upper deck is now made of molded composite material to improve flex which results in increased traction and improved steering characteristics.
New-design ball studs eliminate steering lock and allow greater steering radius
All-new longer rear arms make the car easier to drive in most track conditions. The new rear arms also give flex to help generate more traction and give better handling.
All-new, narrower front lower arms move the arms more frontwards, resulting in improved weight balance.
XB8E suspension arms are the result of long-term testing of different designs and layouts. Length, thickness, flexibility, geometry, and materials used… these are all part of the concepts and details that are thoroughly reviewed to create optimum suspension arms.
The suspension arm itself is rigid enough to provide a responsive feel, yet soft enough for extreme durability. The exclusive composite mixtures used for suspension arms offer a perfect balance between reliability & performance.
To accommodate the longer rear suspension arms, narrower aluminum suspension holders are used.
The aluminum suspension holders feature Integrated Suspension Settings™ (I.S.S.) which allows for quick & easy suspension geometry setting.
Using eccentric suspension bushings inserted into aluminum suspension holders – as well as additional suspension shims – the XB8E suspension geometry can be completely adjusted in mere seconds.
An all-new, improved weight balance was created by moving the front lower suspension arms more frontwards.
This new weight balance makes the car easier to drive, increases predictability, makes the car extremely resistant in rough parts of the tracks, and gives great handling in jumps and fast parts of the track.
All-new optional side guard braces allow for very efficient and easy chassis flex adjustment to adjust the handling of the car to different track conditions. By adding the graphite braces, the entire chassis is reinforced and stiffer flex will improve handling in high-traction conditions.
The XB8E chassis is CNC-machined from 3mm high-quality Swiss 7075 T6 aluminum, strategically machined, 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.
The rear of the chassis is wider to increase stability, and the front is narrower to improve steering. The short chassis has weight balance frontwards (including motor, electronics, batteries, and center diff).
Side guards incorporates a larger bottom radius to make the car more stable on rough tracks. The radius on the side guards increases the car’s longitudinal flex. The side guards are moulded from a special composite mixture for increased flex that helps generate more traction.
The tough composite side guards protect the car from side impacts. The side guards perfectly fit the chassis and seal against dirt.
Front and rear chassis braces have a significant influence on chassis stiffness and flex, and as such have great impact on handling under different grip conditions.
The rear brace has a direct mounting to the rear bulkhead instead to the rear shock tower. The mounting to the bulkhead eliminates transfer of vibrations and energy from the suspension via shock towers. This helps to improve landings and generates more off-power traction.
The rear brace is moulded from a medium-stiff composite mixture for better flex & rigidity, and allows the mounting of optional graphite inserts to reinforce the chassis brace to make it even stiffer (suitable for high-traction conditions).
The battery plate design allows to install the plate either frontwards or rearwards thus to position the batteries either frontwards or rearwards with a significant influence on the weight balance adjustment.
The battery plate itself has sufficient space to move slightly the battery pack more rearwards or frontwards.
The rear of the plate has a dedicated area for a speed controller placement. The Velcro strips are included for comfortable battery mounting.
To adjust the weight balance the heavy battery pack can be easily moved either frontwards or rearwards.
FRONT = More weight in front = Less rear traction
REAR = Less weight in front = More rear traction
Suspension geometry is one of the most important features of any RC model car, yet at the same time is also one of the most difficult and challenging features for a designer to create and perfect.
Suspension is always a mixture of the following:
• Design & shape of individual suspension parts
• Flex & hardness
• Material characteristics
• Mounting method
• Ability to retain freedom of movement
• Geometry & position of connecting point mounting points
From arms & suspension blocks to light-yet-robust steering blocks, every suspension part has been specially designed for 1/8 off-road racing to provide responsive handling and performance characteristics under all racing conditions.
Over the years, XRAY has successfully gained and applied extensive knowledge of suspension geometry & stiffness, all of which has been carefully considered while designing suspension parts. 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.
Moulded from a softer composite mixture, the front upper arm has increased flex in all directions to generate more traction. This also improves handling on rough or destroyed tracks.
Caster is easily adjusted using caster clips that are inserted either in front or behind the front upper arms.
The 1-piece rear upright features geometry that allows it to generate more traction and better absorb bumps. The smart design allows the same upright to be used on both left & right sides.
The upright allows adjustment of the upper roll center by 3 different positions, and lower roll center by 2 different positions. The lower suspension pin on which the rear upright sits features 2 shims for wheelbase adjustment.
The rear uprights feature integrated geometry adjustments including:
• upper roll center
• lower roll center
To reduce weight and lower the CG, all-new front upper pivot balls are combined with steel threaded part for maximum strength. The aluminum ball is machined from premium Swiss 7075 T6 and additionally hardcoated for extended lifespan.
The all-new diff bulkheads were reinforced, updated, and redesigned to accommodate the repositioned Ackermann and to fit the rear brace mounting holder.
Diff bulkheads are an important chassis component, housing both the front and rear differentials and providing mounting points for the suspension mounts and shock towers.
The XB8E is a conventional shaft-driven 4WD off-road car featuring:
• Front & rear gear differentials with adjustable oil viscosity, featuring 46T crown gears and 14T pinion gears
• Central differential with adjustable oil viscosity, featuring 46T spur gear
• Front & rear universal drive shafts, and central CVD drive shafts
Differential main gears are manufactured from HUDY Gear Steel on a precision manual gear machine. This material was specially formulated and developed for use in gears. All gears are hardened to provide the longest possible lifespan.
A wide range of different gears — spur gears and pinion gears — are available for perfect set-up and tailoring to particular racing conditions.
• Pinions are available in sizes of 12T, 13T, 14T, 15T, 16T and 17T
• Spur gears are available in a range of 44T, 45T, 46T, 47T and 48T
All drive shafts are manufactured from world-renowned HUDY Spring Steel™, resulting in some of the world‘s thinnest yet most durable drive shafts used in off-road cars. All drive shafts and outdrives are hardened with a proprietary hardening process to provide unsurpassed lifespan & reliability.
The central larger & stronger outdrives feature protective rubber boots, thick 3mm pins, and protective locking rings.
To guarantee maximum reliability, all turnbuckles are manufactured from a special blend of HUDY Spring Steel™ which is specifically formulated for turnbuckles. The turnbuckles have a tougher core, making them very well suited for the steering system and rear upright linkages.
Ultra-lightweight 17mm wheel hex drive hubs are CNC-machined from Swiss 7075 T6 black-coated aluminum.
The alu hex hubs are specially machined to reduce rotating weight while guaranteeing wobble-free wheel mounting.
Access to the center differential is quickly and easily accomplished by removing eight screws. The lower center diff mount is sized appropriately to allow the use of the optional spur gears, while keeping the mass as low as possible.
The receiver box is mounted on the same graphite plate as the servo. The graphite plate is connected the chassis by an aluminum holder and stand that can be easily removed from chassis for cleaning and maintenance. You need only to remove 3 screws from the bottom of the chassis to remove servo and receiver box.
The motor is connected to a mounting plate, with the assembly then inserted into an integrated motor holder/drivetrain support. The design of this system allows quick and easy motor rotation to adjust gear mesh, and yet clamp.
The motor mount machined from Swiss 7075 T6 and is 2mm wider compared to older version for improved durability.
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.
Aluminum towers are CNC-machined from premium Swiss 7075 T6 and then additionally black coated. The stiffer alu shock towers give better performance at high-traction tracks.
Optional graphite shock towers offer more flex to generate more traction, and are recommended for low-traction tracks.
Oversized big-bore shocks feature 16.2mm I.D. shock bodies which are externally threaded for use 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.
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 use.
The lower shock assembly ensures very free movement of the shock rod 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 & easy.
Thick, robust shock shafts will handle all abusive racing conditions and big jumps. The 3.5mm thick shock shafts are precisely machined from special high-tensile steel, and afterwards are ground to a super-smooth finish to ensure smooth movement.
XB8E shock springs offer a mix of progressive & linear characteristics. XB8 springs are slightly progressive, but under more compression change characteristics to become more linear. This gives excellent feeling & feedback of the car in all different track conditions.
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 optionally:
• Linear: Spring rate is constant during the entire spring compression. Springs with different spring rates are available as optional tuning parts.
• Progressive: Spring rate is not linear, but rather the spring rate get progressively 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.
Ultra-precise shock pistons feature 6-, 8- and 10-hole options. The big-bore pistons are molded from tough, well-proven Delrin® material to provide smooth action and durability. The precision molding production process ensures perfect piston roundness after production, so that the pistons move super-smoothly inside the shock bodies for identical perfect action in all four shocks.
The XB8E body has the desired aerodynamics, downforce, and side stability that ensures proper landing of the car, and with high rear downforce making the XB8E racing body unbeatable in performance design. Produced from high-quality, premium Lexan™ material. The XB8E body comes from the XB8 platform.
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.
The drivetrain ball-bearings now include grease instead of light oil to maximize the lifespan of the ball-bearings, especially in dusty conditions. A full set of 22 high-speed, blue-sealed ball-bearings are used throughout the drivetrain to ensure maximum efficiency.
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.
Check out HUDY Chem Series.
The XB8E 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.
HUDY offers a complete range of chem series featuring of various greases, oils and lubricants increasing the life time of your car.
Check out HUDY Chem Series.
The XB8E features fully-adjustable front and rear suspension geometry. For quick & easy adjustment, we recommend using set-up tools and accessories from HUDY, the world leader of RC tools.
The extensive and impressive range of adjustment possibilities includes:
• Ride height
• Lower roll center
• Upper roll center
• Roll center positions
• Bump steer
• Adjustable shocks
• Adjustable front and rear diffs
• Adjustable XRAY Multi-Flex™
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.
The XB8E is one of the most adjustable off-road cars in the world. Whether you are a hardcore racing enthusiast or a club-level sportsman, you can very easily adjust the XB8E to suit your driving style, track type, and track conditions.
To fully comprehend the set-up possibilities of the XB8E, we highly recommend the HUDY Set-up Book which is loaded with over 50 pages of high-quality pictures and easy-to-understand RC car set-up explanations. The HUDY Set-up book will teach you many set-up tips & tricks to help improve your set-up skills, ultimately translating into improved racing performance with your XB8E. The HUDY Set-up Book is available for download exclusively at www.hudy.net.
XRAY Instruction Manuals have become the industry standard, and 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.
Owning an XRAY model racing car is an experience unto itself. Not only will you own the most premium luxury model racing car in the world, but you will also become a member of the prestigious family of XRAY owners with direct support and service from the XRAY factory. XRAY brings you the most up-to-date RC website on the Internet, with daily racing news, and the latest product developments. If you have any questions, problems or comments, you can ask the XRAY Support Team or any XRAY Factory Team Driver on the XRAY Support Forum. You can even upload your own set-up sheets or download from the thousands of different set-up sheets available from around the world at the exclusive XRAY Virtual Set-up Sheet Database. And that is only the start of the VIP treatment you get by joining Team XRAY.