2015 All-new Specs:

All-new chassis design

All-new motor mount

All-new motor mount flex system

Improved traction

Improved steering characteristics

All-new upper clamps

All-new alu servo mount

All-new graphite servo holder

All-new front/rear lower bulkheads

All-new anti-roll bar mounting system

All-new anti-roll bar wires

Optimized anti-roll bar wire thicknesses

All-new ARS™ system

Choice of rear suspension

All-new composite bumper upper holder brace


Designed for highest performance at all levels of racing

Chassis designed to provide maximum traction and steering

Reduced sensitivity to changing track conditions, giving super-consistent performance during runs

EFRA, ROAR, FEMCA spec compliant for stock and modified racing

Super easy to build, set up, maintain, and drive

Developed, designed and styled by Martin Hudy, manufactured exclusively by XRAY in Europe in the world's most sophisticated RC manufacturing facility

Revolutionary on-road platform with new benchmark for premium quality, reliability and performance

Premium, professional, high-competition model racing car for the most demanding racers

Manufactured from premium European materials, machined using state of the art Swiss and German machines

Premium XRAY service & support


All-new narrower graphite chassis is CNC-machined from 2.2mm thick premium-grade graphite material, and is 3mm narrower than the previous T4’14.

New chassis is specifically designed for different track conditions, and gives increased traction, steering, stability, and improved cornering speed.

Chassis features pre-drilled holes for new ARS™ system.

Chassis features pre-drilled holes for optional parts such as chassis weights, graphite motor guard, graphite adjustable battery holder, and battery strap.

Chassis designed specifically for brushless motors and LiPo batteries; composite battery holders prevent batteries from moving in crashes

Top deck allows installation of optional aluminum stand which changes the car’s flex characteristics

Top deck allows installation of optional graphite steering system plate

Bulkheads have been strategically placed closer to the center of the chassis to improve steering, traction, and stability

Layshaft bulkhead allows removal of top deck attachment screws (front, rear, or both) as the bearing is held by the layshaft bulkhead

New upper bulkhead clamps features new, optimized roll center characteristics

Upper bulkhead clamps designed for the new super-narrow placement of the bulkheads

Independent front and rear diff height adjustment and belt tension adjustment in both front and rear bulkheads

3mm thick super-low profile shock towers lower the CG and improve stability

Motor mount bulkhead is compatible with all standard brushless motors

Centered layshaft and split bulkheads provide enhanced balance due to optimum weight distribution of the motor towards centerline, giving quicker left-right transitions

New motor mount bulkhead is now one piece with layshaft bulkhead to eliminate tweak caused by connected screws

Motor mount bulkhead is connected with new alu motor mount plate to eliminate tweak and also offers new flex adjustment possibilities by adding or removing screw in front of the nut or by using optional post instead of the nut.

All-new front/rear lower bulkheads are designed for new anti-roll bar bearing mounting system


All-new ARS™ suspension (included) offers great adjustment possibilities and driving characteristics

Kit includes both standard & new ARS™ rear suspensions

ARS™ suspension consist of new ARS™ arms, graphite 0° C-hubs for optimal flex characteristics, hard steering blocks, ARS™ post mounted to the chassis, and ARS™ linkage which connects the post with the steering block

ARS™ linkage angle - which is altered by adding and removing shims on the steering block and ARS post mount – changes the toe in characteristics of the rear tires under rolling effect. When the car is pressed, toe-in can either increase or decrease.

aluminum suspension holders featuring Integrated Suspension Settings (ISS) allow super fast and easy suspension geometry setting

Suspension holders allow more durable mounting of the suspension arms, so the suspension geometry of the car does not change even after hard crashes

Suspension mounting system allows for very free arm movement, which gives higher traction, smoother driving, and improved steering

Suspension holder system allows suspension arms to be mounted independently from diff bulkheads allowing for elongated chassis flex to generate more traction

Independent suspension holders allow for more precise and fine set-up adjustments via different bushings

Rear suspension aluminum holders feature integrated toe-in

C-hubs available optionally in standard caster angles (2°, 4°, 6°); available in three hardnesses (M – medium, H – hard, G - graphite)

Hard front steering blocks increase steering response, decrease front tire overheating in high-traction conditions

Small, robust steering blocks made from special proprietary composite material, available optionally in two hardnesses (M – medium, H - hard), and feature 2 Ackermann positions

New rear uprights give increased stability; available optionally in two hardnesses (M – medium, H – hard)

Rear uprights feature integrated 0° toe-in to prevent suspension geometry changes in serious crashes

All-new arms feature innovative SFATM (Suspension Flex Adjustment, innovative and unique graphite stiffeners that allow for super-quick suspension flex adjustment to easily adjust the traction of the car in various track conditions

Suspension arms feature integrated anti-roll bar mounts; rear arms feature 3 different anti-roll bar mounts for super-fine adjustment of the rear anti-roll bar

Front 1. mm & rear 1.3mm anti-roll bar wires included

Easily adjustable wheel offset using optional shims or optional offset wheel hubs (-0.75mm, +0.75mm, +1.5mm)

All-new anti-roll bar system is mounted to the bulkheads via bearings for extra-smooth movement and maximum precision, and side play is eliminated by aluminum bushings.

Anti-roll bar height is adjustable via a screw… quick & easy.


Lightweight middle layshaft CNC-machined made from aircraft aluminum

84T 48P spur gear – extra-hard material, wobble-free design

38/20T (1.9) internal gearing for efficient, high-performance drivetrain

Premium-quality, reinforced drive belts

C-hubs with large openings for quick and easy assembly/disassembly of the CVDs; prevents collision of CVD with C hub in serious crashes (compatible with the ECS drive shafts)

Super-light drive axles have 35% less rotating mass

Super-lightweight Swiss 7075 T6 aluminum rear drive shafts (50mm), hard-anodized, color-coated and laser-engraved, 38% lighter than standard drive shafts

Rebuildable front CVD drive shafts made from world-renowned, self-developed HUDY Spring Steel™; world’s tiniest yet most durable drive shafts are hand ground for maximum precision. Recommended for use in front for increased durability

Super-lightweight wheel axles manufactured from premium HUDY Spring Steel™

7075 T6 aluminum wheel hubs

Complete set of high-speed, blue-sealed ball-bearings are degreased and lightly oiled for maximum efficiency, individually controlled, selected, and inspected

Aluminum self-locking wheel nuts


Composite hubs for differentials to fit super narrow bulkheads

Super-smooth, super-light maintenance-free composite gear differential

Adjustable gear differential stiffness via oil viscosity

Super-light composite Front Solid Axle with XRAY’s own smart quick-change outdrive system for easy outdrive exchange; no servicing or replacement of drive shaft blades needed, translates into reduced servicing costs


Servo mounting system for improved balance and elimination of unwanted tweak

Servo mount allows the servo to be suspended near the chassis centerline, providing better balance while eliminating tweak and allowing for additional traction

Steering is isolated from chassis flex, ensuring tweak-independent steering for super-precise and consistent steering characteristics

New servo mount and graphite servo holder are mounted to the chassis with 3 screws to eliminate the possibility of servo movement under hard crashes

New servo mount includes extra hole where the battery backstop screw can be mounted


Super-Low Profile (SLP) aluminum shocks for lowered CG and improved stability

SLP aluminum shocks have been shortened by more than 7mm to provide maximum stability under all track conditions, while reducing traction roll under high-traction conditions

Shock shafts are specially hardened for maximum strength

Foam inserts for perfect shock rebound

Super Short Shock Springs (4S) developed & designed for the new SLP shocks

C2.5 springs included in the kit are shortened to fit new SLP shocks and the spring rates have been optimized to provide maximum steering and traction

XRAY self-developed and manufactured 4S springs are manually selected for maximum precision, equal length, and equal damping characteristics

New race-tested and tuned shock positions

Bumper & Body Mounts

Front body mounts shortened to lower CG

Front upper and lower composite bumper made from specially formulated material to withstand hard impacts

Super low-profile foam bumper made from lightweight, high-resilience foam

New composite bumper upper holder brace helps to reduce chassis breakage in serious crashes

Assembly, Set-up & Support

Premium 3D full-color Instruction Manual & supplementary sheets

To fully understand the set-up possibilities we recommend the legendary HUDY Set-up Book (available for download exclusively at www.hudy.net) which is loaded with over 50 pages of high-quality pictures and easy-to-read RC car set-up explanations

Exclusive Virtual Online Setup 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, anti-dive, anti-squat, ride height, droop, track-width, roll center, wheelbase

Adjustable gear differential stiffness via oil viscosity

Four different upper linkage positions on upper bulkhead clamps

Roll center height adjustment via shims on upper bulkhead clamps

Adjustable front and rear belt-tension control using quick-adjust system incorporated into bulkheads

Front and rear diff height adjustment using quick-adjust system incorporated into bulkheads

Adjustable HUDY aluminum turnbuckles (steering, front & rear upper links, ARS™)

Multiple upper and lower shock mounting locations at front and rear

Adjustable Ackermann and bump steer

Pre-drilled chassis locations for optional chassis weights in center of chassis

Adjustable front and rear anti-roll bars

Chassis pre-drilled holes for weight balance adjustment

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. All option parts are not included and must be purchased separately. The color of some aluminum parts may vary from kit to kit and some of the kits may not include all the orange or black parts as shown. Some of the spare parts or option parts may not be available at the moment in the orange or black color as shown. All achievements were gained with T1/T2/T3/T4 platform.

T4'15 Specs:

Class:1/10 electric touring car
Width:adjustable 189 mm
Length:372 mm
Wheelbase:adjustable 256-260 mm
Weight:cca 481 g
Ready-to-run weight:cca 1377 g
Chassis:CNC machined 2.2 mm laminated carbon graphite
Shock towers:machined 3.0 mm laminated carbon graphite (front + rear) with multiple shock mounting and camber link roll center positions
Body:not included, uses 190 mm type
Drive Train
Type:dual belt
Main layshaft:lightweight alu middle layshaft with 20T pulleys and 84T 48P spur gear
Drive ratio:1.9
Drive shafts:rebuildable front CVD driveshafts 52mm made from special world-renowned, top-secret, self-developed HUDY Spring Steel; super-lightweight rear 50mm alu drive shaft s CNC-machined from premium Swiss 7075 T6 and hardcoated for extra durability and stylish looks
Front axle:front XRAY Composite Solid Axle with 38T pulley
Rear differential:gear differential
Belts:ultra-thin belts
Bearings:rubber covered high-speed bearings
Front:hard front suspension arms, hard steering blocks
Rear:hard rear suspension arms, hard rear uprights
C-blocks:medium 4° caster blocks
Shocks:XRAY Short Low Profile alu coil-over shocks shortened for improved suspension travel
Camber:adjustable front + rear
Front Caster:4° static (optional 0°, 2° or 6°) with .5° ~ 2° adjustability using squat/dive
Toe-in:adjustable front + rear
Downstops:adjustable front + rear
Front anti-dive:adjustable 0° ~ 2°
Rear anti-squat:adjustable 0° ~ 2°
Anti-roll bars:1.4mm front + 1.2mm rear
Ackermann:To change Ackermann angle, use 2 identical shims (of same thickness) between the alu steering plate and ball end
Steering:centrally-positioned dual steering system
Wheels:not included
Tires:not included
Instructions:full-color manual with 3D graphics:
Set-up book:not included, the T2 2-color set-up book (44 pages) can be downloaded and it shows previous XRAY models in photographs contained within it. However, the methodology and set-up theory are the same for all modern touring cars
Packaging:carton box with vinyl bags with parts
Additionally includedHUDY Graphite Grease, Silicone Oils, Authentication Certificate, set-up sheet, parts list & exploded view, decals
Not included:radio system (transmitter and receiver), steering servo, motor, pinion gear, battery pack, speed controller, charger, 1/10-scale bodyshell (190 mm), wheels, tires, inserts, high-strength fibre tape, double-sided tape, CA glue, bearing oil, medium-grade (blue) threadlock, tools