The GTX8 is typically XRAY– premium, professional, high competition R/C car for the most demanding racers, developed with attention to the smallest details and backed by premium service & support…a luxury masterpiece.
With XRAY's uncompromising design philosophy bringing everything together to make the best GT nitro car, the GTX8 has the unique XRAY character, born of precision craftsmanship, highest attention to detail, and using only the finest quality materials.
The rear section of the chassis was reinforced for less flex on-power, which increases the stability of the car and ensures more on-power control.
The new chassis was redesigned to fit both Soft and Hard composite radio boxes without modification.
The chassis is CNC-machined from 3mm high-quality Swiss 7075 T6 aluminum, strategically machined in low-stress areas, and then anodized to make it as light as possible without affecting strength or rigidity.
All-new front C-hub concept was redesigned and refined especially for GT platform. The GT C-hub suspension improves steering characteristics on and off-power and helps to reduce tire wear. The caster is now easily adjustable by changing bushings in the suspension arm.
The C-hub suspension features C-hubs with preset 16° caster as a great starting point for every track.
To accommodate the new GT C-hub suspension, the front shock tower was redesigned.
Machined from extra-thick premium-grade graphite, both shock towers are light weight and very strong. Front and rear shock towers include multiple shock positions as well as multiple roll center positions.
Longer front & rear shock shafts are now +3mm longer for increased set-up possibilities and to allow more suspension travel.
The shock caps feature 4 bleed holes for easier building and more precise rebound control. Multiple shock membrane choices are available to tune the suspension to a wide variety of track conditions.
Oversized big-bore shocks featuring 16.2mm I.D. shock bodies are 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.
To improve drive train efficiency, the 13T pinion gears are now included for both front and rear bulkheads. Thanks to the higher 3.54:1 internal ratio, vehicle acceleration has also been improved.
All-new alu carrier for 2-speed gear is made from a softer material for improved shifting consistency. The design of the carrier features new outer ribs for improved cooling. Machined from premium Swiss 7075 T6 aluminum.
To improve the braking efficiency and to ensure constant braking characteristics, the ultra-efficient pre-glued brake pads are now included in the kit.
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 laser-cut steel backing plates.
The brake disk is small, slim, and very lightweight. 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. Brake disk and brake pad backing plates are specially heat-treated for maximum lifespan.
The GTX8 now includes the Hard composite radio box. The Hard material is more rigid at higher temperatures to improve the precision of servo movement and has more room for the receiver battery pack.
The optional Soft composite radio box increase chassis flex. This can help improve handling characteristics in some low- to medium-traction conditions.
The 1-piece electronics assembly is very compact and can be quickly & easily removed for servicing and cleaning. It requires removing only a few screws from the bottom of the chassis to remove the entire electronics assembly from the car.
The GTX 150cc extra-large fuel tank was redesigned to comply with the new rules featuring the transient jet that ensures the internal volume of the fuel tank cannot be changed by adjusting the fuel line.
To comply with different race regulations, the design of the GTX8 chassis and fuel tanks allows the installation of either the included 150cc fuel tank or optional 125cc fuel tank.
The extra-strong fuel tank features an integrated floating stone filter that ensures that the fuel pickup will always be in the correct orientation, even if your car isn’t.
Internal baffles inside the fuel tank ensure that the fuel will always be in the area around the fuel line intake so even during large jumps the fuel will be constantly supplied to the engine.
To accommodate the new suspension geometry, the kit now includes +2mm off-set both front and rear.
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.
The drivetrain ball-bearings are now greased instead of oiled to maximize the lifespan of the ball-bearings, especially in dusty conditions. For increased reliability, the front and rear transmission ball-bearings as well the 2-speed ball-bearings feature metal shields.
“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 based on our long-term experiences, knowledge, and R&D expertise gained over decades, taking over the heritage I brought with me.
Using the XB8 platform we have worked with the XRAY R&D team to create the finest and highest performing GT nitro car and I am happy that we continue to carry the legacy of my first off-road cars into this new platform in order to take you to the Winners Circle.”
Dipl. Eng. Juraj Hudy
XRAY Chief Designer
Designed in virtual reality using the world's most sophisticated CAD tools, and manufactured using the world's best machining and molding technology, the GTX8 has attained a level of perfection that is second to none. All parts are purpose-designed and manufactured by XRAY, so all parts fit and work perfectly together.
Before I started racing off-road cars, I was actively professionally racing 1/5 scale on-road cars and I won 2x a European Championship. In my position as R&D Designer at XRAY, I was very happy to be involved again with an on-road project where I could bring my prior experience to the table.
I have thoroughly enjoyed my involvement in this new GT project, and I strongly believe this class will rapidly gain popularity due to its simplicity, easy handling, and great fun. I will continue to support the ongoing development of this new platform, and will be available to support all XRAY customers.
XRAY GTX8 Designer
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 GTX8 is truly a masterpiece.
Some information shown below may include details from previous kits, and it may vary slightly from current kit specifications.
Front and rear chassis braces have significant influence on chassis stiffness and flex, and as such have a great impact on handling under different grip conditions.
The longer rear brace is moulded from a medium-stiff composite mixture for proper flex & rigidity, and allows the mounting of optional graphite inserts to reinforce the brace to make it even stiffer (suitable for high-traction conditions).
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 diff bulkheads have been designed for extreme durability, while providing easy access for tuning and maintenance.
The aluminum suspension holders feature Integrated Suspension Settings™ (I.S.S.) which allow for quick & easy suspension geometry setting.
Using eccentric suspension bushings inserted into aluminum suspension holders – as well as additional suspension shims – the GTX8 suspension geometry can be completely adjusted in mere seconds.
The narrow rear suspension holders work together with the longer rear arms to improve overall grip, forward traction and allow earlier acceleration at corner exit.
The rear uprights feature larger outer 8x16x5mm ball-bearings for increased reliability and life-span. To expand the set-up alternatives, an additional lower roll-center adjustment position was added.
The smart design allows the same upright to be used on both left & right sides. The wheelbase position is adjustable using 2 shims along the lower suspension pin.
The rear uprights feature integrated geometry adjustments including: camber, upper and lower roll center and wheelbase.
The longer camber link accommodates the revised roll center positions on the new uprights.
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 optionally available.
The complete integrated suspension geometry adjustment includes:
• Track Width
• Bump Steer
• Upper Roll Center
• Lower Roll Center
• Kingpin angle
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 and are well suited for steering system and rear upright linkages.
The high-volume differentials improve vehicle control and consistency over long runs and enhance reliability. The differentials feature larger capacity cases and larger internal gears with more teeth for improved differential moment. The larger oil volume and the shape of the gear teeth reduce overheating. The diff pins have stronger design to improve reliability.
Super-lightweight diff outdrives are machined from HUDY Spring Steel™ with unnecessary material removed from the outer part of the outdrives to reduce rotating 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 lifespan and reliability.
Clutch performance is critical to engine operation, fuel mileage, throttle control and traction. The adjustable 4 shoe clutch improves clutch bell engagement for better engine response and improves throttle feel. The clutch design features 4-shoes machined from a graphite material. The clutch setting can be tuned with the adjustment nut to control the engagement point as desired.
GTX8 constant velocity drives (CVDs) are manufactured from world-renowned HUDY Spring Steel™. The drive shafts are some of the world‘s thinnest yet most durable drive shafts used in off-road RC cars.
The larger & stronger central outdrives feature protective rubber boots, thick 3mm pins, and protective locking rings.
All drive shafts and outdrives are hardened with a proprietary hardening process to provide unbeatable lifespan and reliability.
GTX8 springs have been specifically designed to complement the big-bore shocks.
XRAY shock springs are manually measured, selected, and matched into pairs to guarantee precisely equal length and damping characteristics.
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 2-speed transmission is mounted on a precision-manufactured, super-smooth layshaft made from tough HUDY shaft steel for 2-speed, which is additionally heat treated for extra strength and long life.
The 2-speed gear adapter is CNC-machined from Swiss 7075 T6 for precision fitment of the 1-way bearing, allowing super-precise and wobble-free installation of spur gears.
The high-quality 1-way bearing is hand-ground before installation for maximum running precision and strength. The 2-speed adapter is manufactured from hardened steel.
High-grade, CNC-machined aluminum engine mounts are made of lightweight alloy, and they help to dissipate engine heat. The engine mounts are easily adjustable from the bottom of the chassis to obtain proper gear mesh.
The larger front and rear anti-roll bars help control chassis roll, increase corner speed and improve the stability of the car.
The front & rear roll bars are easily mounted to the bulkheads and can be adjusted using the connected linkages.
Manufactured from spring steel material, anti-roll bars of different thickness are optionally available for fine-tuning.
The compact front foam bumper is made from high-resilience foam. The front upper bumper holder and lower composite bumper are molded from rigid composite to withstand hard crashes.
XRAY’s self-designed GTX8 body – made from high-quality Lexan™ material – features high-downforce areas: front windscreen for proper airflow, and side downforce areas for higher stability. The high-performance, low-profile aerodynamic body was designed by XRAY to perfectly fit the GTX8. The rear part of the body includes 3 wing struts for added durability; a high-strength wing is included.
The GTX8 body is available as an option only.
Weight balance on the GTX8 is easy to adjust for different track conditions. Weight can be moved to the front, middle, or rear by moving the suspension arms as required to get the best handling.
The GTX8 features fully-adjustable front & 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™
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.
The chassis design focuses on balanced weight distribution and weight transfer. Centerline holes are pre-drilled in the chassis plate for easy balancing with the HUDY Chassis Balancing Tool #107880.
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.
The GTX8 includes premium HUDY Graphite Grease - a high-performance, advanced-technology semi-fluid lubricant which incorporates both extreme pressure additives and finely-dispersed graphite for superior 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.
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.