XRAY RX8 2013 Edition

XRAY RX8 2013 Edition

XRAY announces their 2013 specs for their popular nitro 1/8 on-road car. Read about them in the press release below:

The road to realizing my dream was often filled with challenges, twists & turns, revelations & victories. Such was the literal truth in my pursuit of the ultimate racing machine, fuelled by passion and vision… a dream realized as the RX8. With a full stable of nearly every imaginable RC car in the XRAY line-up, the center stage held an empty spot for a new flagship to showcase XRAY ideals, philosophy, and commitment to racing perfection.

Borne of childhood passion and developed from my 37-year heritage of dedication to engineering ingenuity, the RX8 was crafted for one purpose: to be the definitive representation of XRAY craftsmanship and sophisticated engineering. My quest for realizing the dream has involved the full range of the substantial resources at XRAY’s disposal: concept & design, research & development in virtual and physical reality, and rigorously thorough testing before the RX8 races out of the stable and into the arms of the eagerly waiting world. Joining its brethren in the XRAY family, the RX8 is positioned to capture the hearts and minds of the racing world, and carry them into the Winner’s Circle.

Dipl. Eng. Juraj Hudy
XRAY chief designer

RX8’13 New Features:

  • All-new fuel tank with interior baffles for stable engine performance
  • All-new Low Profile (LP) shocks
  • All-new lower alu shock bodies
  • All-new shorter shock rods
  • All-new fixed Delrin pistons
  • All-new Short Shock Springs (3S)
  • All-new front and rear lowered shock towers
  • All-new Reverse Clutch set for increased performance & durability
  • All-new shape of clutchbell
  • All-new clutchnut
  • All-new ultra-stable clutch spring
  • All-new redesigned front lower bumper for increased downforce, durability & stability of the car
  • All-new redesigned front upper bumper for increased durability
  • All-new redesigned rear lower arm 2-positions graphite shock holders for increased durability
  • All-new independent muffler mounting
  • All-new longer muffler wire
  • All-new front left bulkhead
  • All-new rear 2-speed shaft ball-bearing for increased durability
  • All-new rear right bulkhead for larger 2-speed shaft bearing
  • All-new stronger servo saver spring for increased steering and improved steering response
  • All-new steel servo saver pivot shaft for increased durability
  • All-new steel belt tensioner bushings for increased durability
  • All-new steel brake cam post for increased durability
  • All-new composite rear body holder for higher body mounting
  • Included optional lightweight front middle shaft from HUDY Spring Steel™
  • Included optional lightweight alu brake disk adapter


  • Developed, designed, and styled by legendary Dipl. Eng. Juraj Hudy and Martin Hudy, manufactured exclusively by XRAY in Europe in the world’s most sophisticated RC manufacturing facility
  • Pure racing design, premium luxury quality, highest performance
  • Premium, exclusive, and high-tech materials used throughout
  • Unique, super-strong composite materials with XRAY’s self-developed secret compound mixtures for suspension and drive train parts
  • World’s lowest CG 1/8 on-road car platform
  • Easy-access to drive train parts for super-quick rebuilds and set-up changes


  • CNC-machined 5mm Swiss 7075 T6 chassis, super-narrow design
  • Special openings machined and front and rear of chassis for additional graphite stiffeners and weights
  • Super-narrow radio plate CNC-machined from high-grade 2.5mm graphite
  • Centralized 125cc fuel tank offers 3 mounting positions, internal stone-type filter, and volume inserts to fine-tune fuel capacity
  • Fuel tank pressure cap with 1-pc profiled seal for perfect fit and sealing
  • Composite front and rear bulkheads for precision engineered suspension geometry and chassis flex
  • Belt tension adjustment in front and rear bulkheads
  • Unique compact lightweight radio case with rubber-covered quick-access system
  • Centralized, low-mounted receiver battery pack below fuel tank for easy access
  • Optional micro-size receiver battery pack allows fuel tank to be lowered by 3mm, creating an ultra-low 1/8 on-road platform
  • Ultra-low radio plate to create the world’s lowest platform
  • Easy radio plate flex adjustment via bushings

Engine & Clutch

  • Quick-set aluminum engine mount system with fixed engine position for super-easy engine installation and gear mesh adjustment
  • Swiss 7075 T6 hardcoated flywheel
  • Easily-adjustable 3-shoe XCA (XRAY Centrifugal-axial) clutch
  • Clutch nut and preload adjustment collar manufactured from special HUDY Spring Steel™ for maximum lifespan and durability
  • Ultra-lightweight precision support plate and spring cup manufactured from high-tensile 7075 T6 aluminum
  • Clutchbell manufactured from high-grade special steel for high durability and superior lifespan
  • Clutchbell / pinion gear construction allows super-precise assembly
  • Swiss 7075 T6 machined pinion gears feature special profile teeth that are individually machined on a high-precision gear production machine; special hardcoating ensures maximum life
  • Carbide axial thrust-bearing and high-tensile spring
  • Robust spring-mounted exhaust mounting system


  • 7075 T6 aluminum brake hub with hardened, pressed brake disk drive pins
  • CNC-machined 1-piece brake disk with ventilating groove to dissipate heat from both sides of the disk
  • Brake disk is precision flat-ground for maximum braking efficiency and super-smooth braking action; strategically-placed ventilation holes ensure minimal brake pad wear
  • Brake disk manufactured from special steel and additionally heat-treated for maximum lifespan
  • Brake pad backing plates heat-treated for maximum lifespan
  • High-grip brake pads are specially bonded to backing plates for high resistance to generated heat build up
  • Special return springs ensure proper gap between brake pads
  • CNC-machined 7075 T6 aluminum brake cam is ball-bearing supported for super smoothness and precise brake control


  • Ultra-smooth and efficient drivetrain using belt/pulley construction for lowest rotating mass
  • Exclusive HUDY Spring Steel™ drivetrain parts for highest performance and unmatched lifespan
  • High-performance HUDY Spring Steel™ front CVD drive shafts
  • Rear dogbone style HUDY Spring Steel™ drive shafts
  • Super-lightweight wheel axles CNC-machined from HUDY Spring Steel™
  • Swiss 7075 T6 alu wheel locks
  • Rear solid axle outdrives manufactured from HUDY Spring Steel™, specially hand-ground for maximum precision and smooth operation
  • PUR®-reinforced high-efficiency, low-friction, fine-pitch drive belts
  • Front middle shaft features large pulley for smooth belt operation and increased lifespan
  • Oversized pulleys for maximum-efficiency belt wrapping
  • Pulleys molded from super-low friction composite material for extra-long lifespan
  • All pulleys have 1-pc design to eliminate need for alu adapters (reduced weight)
  • Complete set of high-speed, blue-sealed ball-bearings, degreased, lightly oiled for maximum efficiency, individually controlled, selected, and inspected
  • Adjustable graphite side-belt tensioner

2-Speed Transmission

  • Precision-manufactured, super-smooth lightweight hollow middle layshaft made from tough HUDY Shaft Steel, specially heat treated for extra strength and long life
  • High-quality 1-way bearing hand-ground for maximum running precision and strength
  • 2-speed spur gear adapter CNC-machined from Swiss 7075 T6 for precision fitment of 1-way bearing, allowing super-precise and wobble-free spur gear installation
  • World’s most precise spur gears molded from special composite mixture ensures wobble-free running and eliminates run-out
  • Wide 2nd gear for increased durability and lifespan
  • Stiff 2-speed springs
  • Precise 2-speed adapter manufactured from hardened steel
  • The 2-speed gear box shoes molded from special composite mixture


  • Super lightweight front one-way differential with 1-way bearing
  • Front axle body machined from high-quality Swiss 7075 T6
  • Rear steel lightweight 1-piece solid axle features composite pulley with holes for self-cleaning
  • Diff outdrives manufactured from HUDY Spring Steel™ and specially ground for maximum precision


  • Advanced suspension geometry precision engineered and finely tuned for high-competition racing
  • Lightweight, durable, and reinforced suspension parts molded from XRAY’s self-developed composite mixture for suspension parts. Each suspension part is molded from a high-tech composite that is specially formulated for the particular part
  • High-tensile steel suspension pivot pins polished for smooth suspension action
  • Front and rear suspension arms allow super-easy wheelbase and weight balance adjustment
  • Fully-adjustable suspension featuring I.S.S. (Integrated Suspension Settings™) – front upper and rear lower suspension is mounted via eccentric bushings which allow full roll center adjustment (up/down & in/out)
  • Front steering block and rear uprights feature eccentric bushings for roll center and caster adjustment. Eccentric bushings in rear upright allow independent wheelbase adjustment.
  • Small, robust rear uprights feature two easily-adjustable upper roll center positions for traction adjustment. Uprights feature two body mounting adjustment positions to accommodate different body types
  • Easily-adjustable 0.5-2.5mm wheel offset using included shims on the wheel axles for front steering adjustment and rear traction characteristic adjustment
  • Front and rear track-width adjustment
  • Front upper arm design allows quick & easy caster adjustment
  • Hand-ground blade-style front-anti roll bars manufactured from Hudy Spring Steel™ are easily adjustable to alter stiffness
  • Front anti-roll bars are fully independent from front downstop adjustment
  • Rear wobble-free anti-roll bar supported by ball-bearings
  • Optional wire anti-roll bars or blade-style anti-roll bar for fine tuning
  • Premium Hudy Spring Steel™ adjustable turnbuckles
  • Lightweight, super-strong composite pivotball nuts
  • Precision pivotballs are specially hardened for exceptional robustness and enhanced lifespan
  • Rear lower suspension mounted independently from bulkheads;
  • Rear upright features shorter and longer pivot balls in the kit for optimum set-up adjustment


  • Centralized ball-bearing supported steering servo saver with adjustable spring tension
  • 4 Ackermann positions
  • Servo mounting system for mid-size servos
  • Steering blocks with ideal Ackermann


  • XRAY shocks feature fixed 3 and 4 holes pistons with 1.1, 1.2 and1.3mm holes
  • Fine-threaded alu racing shock bodies for precise height adjustment
  • Specially-hardened shock shafts for maximum strength
  • XRAY self-developed and manufactured 3S racing springs are hand-selected and tested for maximum precision, equal length, and equal damping characteristics
  • Shocks are mounted to graphite shock holders which are mounted on arms with geometry engineered for maximum stability
  • Front and rear CNC-machined premium graphite shock towers feature shock positions engineered for high-competition racing

Body & Wheels

  • Front bumper with precision downforce design which includes removable sections for downforce adjustment
  • Front and rear body mounts allow 2mm front/rear body position adjustment
  • Special composite mixture rear body mount with 3 positions for rear upright downforce adjustment
  • Front upper and lower composite bumpers are made from a special composite material to withstand hard impacts

Assembly & Support

  • Premium 3D full-color Instruction Manual is included and the comprehensive XRAY Set-up Book is available online as a free download
  • Exclusive Virtual Online Set-up Sheet database with thousands of set-up sheets for race tracks around the world
  • Premium, unmatched XRAY online support

Adjustment Possibilities:

  • Fully-adjustable front and rear suspension geometry: caster, camber, toe, ride height, droop, wheelbase, track-width, roll centers
  • Adjustable front & rear roll centers
  • Adjustable belt tension via bulkhead inserts
  • Adjustable HUDY Spring Steel™ turnbuckles (steering, servo, rear upper links)
  • Adjustable Ackermann positions
  • Front & rear upper and lower shock mounting locations
  • Adjustable alu racing shocks
  • Adjustable front anti-roll bar
  • Optional adjustable rear anti-roll bar
  • Adjustable weight balance

All specifications are subject to change without prior notice. Pre-production prototype is shown, final specifications may slightly vary. In some pictures optional parts may be shown. Option parts are not included and some must be purchased separately. Color of some aluminum parts may vary from the pictures and may be different between the different kits.

RX8 Specs:


Class: 1/8 nitro on-road car
Length w/o body: 436 mm
Chassis length: 388 mm
Wheelbase: adjustable 291 ~299 mm
Width: adjustable 252 ~260 mm
Weight: 1260 g
Ready-to-run weight: 2290 g


Chassis: CNC-machined 5.0 mm Swiss 7075 T6 aluminum
Shock towers: machined laminated carbon graphite (front + rear) with multiple shock mounting and camber link roll center positions
Radio tray: machined laminated carbon graphite


Type: triple belt, 4WD
Final drive ratio (FDR): 2-speed: 1st 6.63; 2nd 5.52
Front differential: one-way
Rear differential: solid axle
Front drive axle: CVD drive shafts – Hudy Spring Steel™
Rear drive axle: dogbone drive shafts – Hudy Spring Steel™
Suspension: pivot ball suspension
Shocks: Machined aluminum, oil-filled, coil-over shocks
Pinion gear (std): hardcoated alu 1st: 17T ; 2nd: 20T
Spur gear (std): molded composite 1st: 49T ; 2nd: 46T
Arms: standard


Ride height: adjustable front + rear
Camber: adjustable front + rear
Caster: adjustable front
Toe: adjustable front + rear
Downstops: adjustable front + rear
Roll center: adjustable front + rear
Ackermann: adjustable front
Anti-roll bars: adjustable front, 2.8 mm rear (optional adjustable)


Wheels: not included
Instructions: full-color Instruction Manual with 3D graphics
Packaging: carton box with vinyl bags with parts
Additionally included: Authentication Certificate, set-up sheet, parts list & exploded view, decals
Not included: radio system (transmitter and receiver), personal transponder, steering & throttle servos, engine, manifold & exhaust, starter box & starter box battery pack, receiver battery pack, glowplug igniter, battery charger, 1/8-scale bodyshell , wheels & tires, Lexan® paint, model R/C car fuel (nitromethane), tape, air filter & oil, CA glue, bearing oil, medium-grade (blue) threadlock, tire truer, tools

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

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Updated: July 16, 2015 — 4:44 PM
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