XRAY XB4 4WD 1/10 Off-Road Buggy

XRAY XB4 4WD 1/10 Off-Road Buggy

XRAY now offers a 4WD 1/10 buggy that is loaded with great features like a Swiss 7075 T6 hard coated 2.0 aluminum chassis, graphite braces and shock towers, front and rear gear differential, and much, much more. Check out all the features in the press release below:

It’s time to raise the bar in the 1/10 buggy class. It is time to bring high quality, high performance and premium support & service to the 1/10 buggy category. It is time for the all-new XRAY 1/10 buggy, the new XB4…the new trend setter…the new beast to beat.

“To create an all new platform in a new class is the most demanding and difficult task for an RC car designer. The benefit is that since you are starting from zero there are no limitations other than your imagination.

To design and develop this buggy was an incredibly challenging project. Nearly 2 years were spent in prototyping and development and the XRAY factory off-road team has tested many different designs and configurations ranging from conservative to crazy.

I am very happy and very proud to present you the final design chosen after extensive testing around the world in various conditions by some of the world’s best drivers and backed-up with the artistic craftsmanship of our in-house XRAY factory production specialists. Designed, developed and fully manufactured in Slovakia, Europe, with XRAY’s legendary attention to the details, fine materials and extreme performance, I am excited to present you the all-new XB4.”

Dipl. Eng. Juraj Hudy
XRAY XB4 designer

Main features:

  • All-new XB4 1/10 off-road 4WD platform
  • Designed for highest performance at all levels of racing
  • Developed for brushless motors and saddle pack LiPo batteries
  • Engineered with typical attention to the smallest details
  • Manufactured with legendary artistic craftsmanship from premium European materials
  • Unique XRAY Multi-FlexTM technology for easy chassis flex adjustment
  • Swiss 7075 T6 hard coated 2.0 aluminum chassis
  • Composite chassis frame with tray design featuring plenty of space for electronics
  • Chassis designed to provide maximum traction and steering
  • Precise front to rear balance as well left to right side balance
  • Graphite 2.0mm: upper deck, rear braces, front steering connecting plate
  • Graphite 3.0mm: front & rear shock towers
  • Unique & innovative front & rear bulkheads which allow access to the differentials using only 4 screws
  • Innovative aluminum motor mount with independent bayonet style motor plate allows quick, easy and secure gear mesh adjustment
  • Front & rear gear differential with adjustable oil viscosity featuring 35T crown gear and 14T pinion gear
  • Robust central 81T spur gear molded from exclusive secret blend of composite material
  • Internal drive ratio 1:2.5
  • Adjustable center slipper clutch with easy tuning featuring lightweight HUDY Spring Steel outdrives hardened for extra life and reliability
  • Hardened slipper plates from Swiss 7075 T6 with black surface treatment
  • Molded front& rear gear differentials included to provide increased on-power steering, and featuring maintenance-free design using premium materials like our special custom composite mixture and lightweight, hardened, HUDY Spring Steel out drives
  • Constant velocity drives (CVD) are manufactured from special HUDY Spring Steel for reduced weight and increased durability. The shafts are hand ground for maximum precision.
  • Safety collars for all drive shafts ensures that the mounting pins are securely captured
  • Swiss 7075 T6 aluminum suspension holders front and rear
  • Integrated Suspension Settings (I.S.S.) for super fast, easy and comfortable suspension geometry setting (caster, toe-in, roll-centers, kick-up, anti-squat, wheelbase, trackwidth) using eccentric bushings inserted into aluminum suspension holders
  • Specially designed suspension components manufactured from carefully formulated custom composite mixtures to ensure proper flex and durability. Geometry has been tuned for performance versatility in all racing conditions.
  • Lightweight 1-piece caster blocks with preset 9° caster with easy adjustable roll center position featuring larger openings for quick and easy disassembly of CVDs; optional 6° caster block available
  • Front chassis feature pre-angled caster of 8° and with the variable I.S.S. settings a range 16~20° of total caster can be achieved
  • Tiny yet robust steering blocks molded from a special composite mixture for maximum strength featuring adjustable lower roll center.
  • Very compact 0° toe-in rear uprights feature 2 different roll center positions and 3 different upper roll center positions and with included shim on the pivot pin wheelbase is easily adjusted.
  • Oversized bearings are included on outboard suspension positions to carry increased dynamic loads.
  • Ultra-lightweight 14mm wheel hex drive hubs CNC-machined from Swiss 7075 T6 and additionally black-coated have ultra-true hex clamping design which ensures solid mounting of the wheel
  • Optional -0.75mm and +0.75 off-set wheel hex drive hubs available for super fine adjustment
  • Very simple yet effective steering system with integrated adjustable servo saver ensures perfect steering featuring easily adjustable Ackermann and bump steer
  • HUDY Spring SteelTM turnbuckles specially hardened for maximum strength used for front and rear upright linkages, steering system and servo saver
  • Consistent and reliable membrane-free big bore shocks with bleed-screw shock cap design feature up-stop shock rod travel adjustment via o-rings and downstop adjustment using shims under pistons
  • Swiss 7075 T6 aluminum shock bodies, lower nut & bleeder shock caps are hard coated in black
  • Delrin pistons molded using super precise moulds featuring multiple types of pistons including different holes and diameters for precise shock adjustment; for custom adjustment a set of blank pistons are also included
  • Shock rods are machined from a special steel material, precision hand-ground for maximum smooth operation and additionally hardened for increased lifetime
  • Premium shock springs designed specifically for big bore shocks; manually measured, selected and matched into pairs to guarantee equal length and damping characteristics; laser engraved for easy identification
  • Full line of linear and progressive shock springs available
  • Premium silicone oils laboratory tested and calibrated to ensure highest possible consistency and quality
  • Anti-roll bars manufactured from special spring steel material to stabilize the car at both front and rear are mounted to the diff cases & can be easily adjusted via linkages; laser engraved for easy identification and available in all different sizes for fine-tuning
  • Full set of 22 high-speed, blue-sealed ball-bearings used throughout the drivetrain to ensure maximum efficiency, degreased and oiled with Aero Shell Fluid 12 for maximum smoothness and long life
  • Stylish & effective rear wing designed to work perfectly with the original XB4 body; made from strong Lexan material, supported by extra flat shims
  • High performance low profile aerodynamic body designed by XRAY to perfectly fit the XB4 and work in most track conditions effectively
  • Beefy 6mm thick body posts from special composite material for maximum strength
  • Specially designed 14mm hex hub aerodisk wheels for high competition racing; featuring reinforcement ribs to eliminate deformation and molded from very flexible material to remain durable against impacts
  • Aluminum self-locking wheel nuts
  • Super easy to build, set up, maintain, and drive

Adjustment Possibilities:

  • Fully-adjustable front and rear suspension geometry: caster, camber, toe, kick-up, anti-squat, ride height, droop, track-width, roll center, wheelbase, roll centers
  • Adjustable gear differential action via oil viscosity
  • Adjustable slipper clutch
  • Adjustable HUDY Sprint Steel turnbuckles (steering, front & rear upper links)
  • Multiple upper and lower shock mounting locations at front and rear
  • Adjustable Ackermann and bumpsteer
  • Adjustable front and rear anti-roll bars
  • Chassis pre-drilled holes for weight balance adjustment


Class: 1/10 electric 4WD off-road car
Width: Adjustable 245-250mm
Length: 352 mm
Wheelbase: Adjustable 279-281 mm
Weight: 850 g
Ready-to-run weight: 1650 g


Chassis: CNC-machined Swiss 7075 T6 aluminum
Chassis tray: Composite 1-piece
Front upper deck: Machined 2.0 mm laminated carbon graphite


Suspension: Adjustable suspension via Integrated Suspension System I.S.S.
Rear suspension: Lower arm with adjustable upper camber link
Front suspension: Lower arm with adjustable upper camber link and with 9° caster blocks
Rear upright: Composite 0° toe-in with dual arm mounting and 3 roll center positions
Shocks: Big bore membrane free shock absorbers with Delrin pistons
Shock towers: Machined 3.0 mm laminated carbon graphite (front + rear) with multiple shock mounting and camber link roll center positions


Type: Full-time shaft-drive 4WD
Primary: Pinion / spur
Drive shafts: HUDY Spring Steel™ CVD drive shafts
Central shafts: HUDY Spring Steel™ Direct Connection Shafts™
Differentials: Sealed gear differential, 6 gear, silicone-filled
Slipper clutch: Adjustable
Bearings: Rubber-sealed high-speed bearings


Primary ratio: 1:2.5
Differential pinion: 14T front / rear
Differential crown gear: 35T front / rear
Spur gear: 81T (84T option)
Motor pinion: Not included


Camber: Adjustable front + rear
Front Caster: 9° static +7~11° caster in chassis = 16°~20° total caster range
Optional 6°static +7~11° caster in chassis = 13°~17° total caster range
Toe-in: Adjustable front + rear
Downstops: Adjustable front + rear
Front kick-up: Adjustable 7° ~ 11°
Rear anti-squat: Adjustable 1° ~ 5°
Anti-roll bars: 1.2mm front / rear
Ackermann: Adjustable
Bump steer: Adjustable
Steering: Centrally-positioned dual steering system

Body, Tires, Wheels & Misc

Body: XRAY XB4 body
Tires: Not included
Wheels: XRAY Aerodisk 14mm Wheel hex hub

Adjustment Possibilities

Standard adjustment: Camber, toe-in, caster, track width, wheelbase, kick-up, anti-squat, roll center, Ackermann, bump steer
Instructions: Full-color manual with 3D graphics (40 pages)
Set-up book: Not included. HUDY 2-color off-road set-up book (40 pages) can be downloaded in the „Download section“ and it shows 1/8 off-road models in photographs contained within it. However, the methodology and set-up theory are the same for all modern 1/10 off-road cars.
Packaging: Carton box with vinyl bags with parts
Additionally included: HUDY Graphite Grease, Silicone Oils, Authentication Certificate, Set-up sheet, Parts list & Exploded view, Decals

Items Not Included

Radio system (transmitter and receiver), steering servo, motor, pinion gear, LiPo battery packs, speed controller, charger, tires, inserts, double-sided tape, CA glue, bearing oil, medium-grade (blue) threadlock, universal tool for all nuts and turnbuckles and other tools

[nggallery id=1062]

If you like this article, check out this additional article on XRAY.

Never miss an issue of RC Car Action!

Subscribe today with a Digital Edition subscription or Print + Digital combo!


Updated: December 4, 2012 — 9:47 AM
Air Age Media ©