XRAY have introduced the 2020 version of the XB8 1/8th Nitro Buggy kit.
- All-new 4mm longer chassis for improved stability.
- Longer center rear driveshaft to match the new chassis.
- All-new front shock tower with 2nd row of lower shock mounting positions for tracks requiring higher corner speed and more stability.
- All-new lightweight flywheel for faster engagement.
- Hard clutch springs for improved engagement.
- Ultra-efficient pre-glued brake pads for improved braking efficiency and consistent braking characteristics.
- 48T spur gear for improved acceleration.
- Redesigned center upper deck to fit the 48T center spur gear.
- All-new fuel tank with transient jet for more consistent tank pressure and to ensure constant volume.
- All-new redesigned IFMAR legal rear wing increases stability in all conditions.
- Front and rear CV drive shafts included for increased traction and easier maintenance.
- All-new greased bearings for pinion gears and diffs for increased reliability.
- +2mm offset wheel hubs for rear suspension.
- New shock bodies revised to accept new composite shims for improved shock shaft movement.
- Includes 4-dot front shock springs.
- Includes hard composite radio box for chassis stiffness and reliability in hotter temperatures, improved precision of servo movement and more space for the receiver battery pack.
All-new chassis was refined and extended by 4mm to improve stability and handling characteristics. The longer chassis provides more wheelbase choices to maximize performance in every track condition.
The XB8 chassis fits both Soft and Hard composite radio boxes without chassis modification. The included Hard radio box increases chassis rigidity and handling consistency. The harder material also retains its stiffness in very high temperature conditions.
The optional Soft radio box can increase traction as it allows more chassis flex. 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.
- Shock Towers.
The all-new front shock tower was redesigned to increase the set-up choices using the shock position adjustment. The new front shock tower features two rows of shock positions.
- Higher shock mounting holes:
Increased traction, recommended for low-traction and rough conditions.
- Lower shock mounting holes:
Increased stability, recommended for high-traction tracks.
- Drive Shafts.
All-new longer central rear driveshaft to match the longer chassis. CV drive shafts are now included for both the front and rear suspension to assist with increased traction and for easier maintenance and servicing. The front steering block ball-bearings are updated to accommodate the CV axles.
All XB8 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 and stronger outdrives feature protective rubber boots, thick 3mm pins, and protective locking rings.
- Gear Differential.
Both front and rear differentials are now identical for easier maintenance and servicing. The Large Volume diffs feature higher capacity cases, stronger diff pins, and large internal gears with more teeth for improved differential action, consistency and overall reliability. The larger volume of the differential and the shape of the gear teeth help reduce oil overheating.
- High-Torque Clutch.
The high-torque clutch features a new lightweight flywheel. The flywheel was redesigned with reduced mass for quicker engine response and clutch engagement. The high-torque clutch provides smooth, continuous power transfer from the engine to the driveline. With the included Hard springs, the clutch engages higher in the RPM range, resulting in more controllable power during acceleration while still maintaining good engine response and performance on jumps.
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 results in improved lifespan. The smaller diameter allows the flywheel to be more protected after landing large jumps, so there is a reduced chance of accidental engine stoppages. The extra-tough flywheel nut is machined from Hudy Spring Steel. The clutch is equipped with hard clutch springs; optional soft and medium springs are also available.
- 4-Shoe Clutch.
The optional 4-shoe clutch features smaller, lighter internal parts, and the design allows for more balanced clutch bell engagement compared to a traditional 3-shoe design.
The 4-shoe design allows the use of multiple combinations of different shoe hardness and spring tensions for clutch engagement tuning, and even allows for mixed combinations of shoes and springs which gives ultra-fine engagement choices. There are 4 different hardness of shoes and 3 different hardness of springs available. Changing the clutch configuration is very easy thanks to the special assembly screws that hold the shoe and spring.
Soft clutch setting generates the highest amount of traction and engages earliest.
Medium clutch setting allows more clutch slippage and engages later.
Hard clutch setting engages latest and provides more revs to engine.
- Diff Gears & Drivetrain Ratio.
To improve the acceleration of the XB8, the 48T spur gear is included in the kit.
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 gear, clutch bell, crown gear — is available for perfect set-up and tailoring to particular racing conditions.
Clutch bells are available in sizes of 12T, 13T, 14T, and 15T.
Spur gears are available in a range of 46T, 47T, and 48T.
- Brake System.
To improve the braking efficiency and to ensure constant braking characteristics, the ultra-efficient pre-glued brake pads are now included in the XB8 kit. The center upper plate was redesigned to clear the larger 48T spur gear now included in the kit. The XB8 features a well-proven, high-performance braking system that is strong, precise, and dependable to make slowing and stopping almost effortless. Coupled with the car’s balanced load distribution, the extraordinary control imparted by the braking system gives you complete confidence as you pitch the car into corners.
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 XB8 shocks were improved with updated shock bodies redesigned to fit the new composite lower shims for improved shock shaft movement. The shock caps feature 4 bleed holes for easier building and more precise rebound control. The longer shock shafts allow more suspension travel. 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 hard-coated in a titanium color and feature a 1-piece alu shock cap. The XB8 now includes the 4 Dot front springs.
- Shock Springs.
The XB8 now includes the 4-dot front shock springs for better stability. XRAY shock springs are manually measured, selected and matched into pairs to guarantee precisely equal length and damping characteristics.
- Radio Box.
The XB8 now includes the Hard composite radio box that is more rigid in 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 large, molded radio box features a very clean design and layout that places the weight in key areas for proper balance. The batteries are placed along the front centerline of the chassis, and the lightweight receiver is placed on its side at the rear. The easy-access radio box is mounted on the side of the car and is secured by the fewest possible screws.
The XB8 molded wing was completely redesigned. The new shape of the wing increases the stability of the car in all conditions and is legal under the new IFMAR wing specifications. Made from a strong special composite mixture, the wing was designed to survive severe abusive and extreme crashes while keeping its shape.
The optional Lexan wing has an adjustable position and consists of two pieces: the main wing and the center fin that adds more stability and increases strength of the wing around the mounting area. The rear section of the wing is pre-bent to reinforce the wing and eliminates the use of additional heavy composite wickers. This makes the back of the wing strong while still allowing for wing flex in a crash. The pre-bent rear section of the wing is an important detail to create the desired downforce. Used by the factory team and suggested for all track conditions.
- Aluminium wheel hubs.
To accommodate the new geometry, the XB8 now includes rear wheel hubs with a +2mm off-set while the front features the +1mm off-set wheel hubs. Ultra-lightweight 17mm wheel hex drive hubs are CNC-machined from Swiss 7075 T6 black-coated aluminum. The aluminium hex hubs are specially machined to reduce rotating weight while guaranteeing wobble-free wheel mounting.
A full set of 24 high-speed ball-bearings are used throughout the XB8 drivetrain. All-new grease lubricated bearings are included for the pinion gears and diffs to increase reliability and lifespan, especially in dusty conditions. The remaining bearings are degreased and oiled with AeroShell® Fluid 12 to reduce drag and maximize driveline efficiency.
- Fuel Tank.
The XB8 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 pulling the fuel line. 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. This fuel pickup system will allow fuel to continue to flow to your engine, even while waiting for a marshal to reach your inverted car and put it back on its wheels.
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. The fuel tank cap features a very strong spring which ensures the cap will always close after refueling, and the specially designed rubber gasket perfectly seals the fuel tank and ensures no fuel will leak outside.