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| X4'24 All-new features: |
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• New suspension arms with relocated shock positions improve lower arm flex and reduce twist under load
• Inner shock locations improve weight distribution with the shocks closer to the vehicle midline
• Lower arms use under arm anti-roll bar mounting and reduce shock height by 4.5mm for ultra-low CG
• Upper arms are shaped for clearance around the new shock position while maintaining proper suspension geometry and rigidity
• Front and rear shock holders use shims to adjust shock positions in finer increments
• Three different shock holder mounting options provide chassis flex alternatives to tune responsiveness and grip
• Active or fixed rear shock holder configurations provide two dampening alternatives in one mount
• Simplified shock absorber installation uses a fixed set screw to secure the threaded shock mount stud and prevent movement in the mount during maintenance
• Front steering plates with improved Ackermann positions integrate with the new arms and shock positions
• Rear ARS plates move the link forward for improved rotation
• Improved ECS drive shaft case uses a C-clip to secure a new aluminum sleeve that captures the coupler pins without the use of set screws for improved reliability and easy assembly
• Narrower chassis design reduces cornering drag, while additional material in the central motor area improves durability and reduces chassis fatigue
• Updated chassis layout matches the new lower arms, shock holders and motor mount attachment points, while also moving the battery holder mounting points closer to the centerline to reduce chassis width
• 3mm centering pins and an additional forward motor mount attachment point improve durability and expand flex adjustments to provide improved stability on high grip black carpet tracks.
• Additional motor mount clearance for ESC wiring allows cleaner electronics installation
• Bulkhead anti-roll bar locations are moved lower, along with a new ARS link position on the rear bulkheads, to match the improved suspension geometry
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| X4 Editions. |
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The X4 platform is tested for improvements across all track conditions to provide race-ready performance out of the box. Even with this goal, there are still differences in track conditions that can require different components for the best results.
Two versions of the X4’24 allow customers to choose their ideal starting point: the Graphite Edition and the Aluminum Edition, each tuned for different track conditions.
The Graphite edition is intended for asphalt tracks and lower traction carpet tracks.
The Aluminum edition is suitable for all carpet tracks, ranging from the low- to medium bite found on many EU carpet tracks to the high bite conditions found on US black carpet, and on very high traction asphalt tracks. |
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| Chassis. |
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The X4’24 chassis was redesigned to work with the new lower arms, shock holders, bulkheads, motor mount and centralized battery holders. The new chassis features a narrower design in the front center and rear center areas to eliminate chassis rub and improve cornering speed. The added material in the motor area extends overall chassis life. The chassis also features updated holes for the stronger 3mm motor mount centering pins for improved durability and an additional front motor mount screw position for black carpet.
The graphite adjustable battery holders are moved closer to the chassis centerline so more material can be removed in the common chassis rub areas to improve cornering speed.
More material under motor area improves the life of the chassis on the bumpy tracks while also improving chassis flex characteristics.
The ’24 motor mount features an extra front mounting point added for high grip black carpet, improving the stability and consistency of the car in these particular conditions.
The new motor mount also features larger 3mm centering pins for increased durability in serious crashes compared to the previous 2mm pins. |
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| Chassis. |
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There are two chassis alternatives to choose from when selecting your X4’24:
The 2.2mm graphite chassis is CNC-machined from premium-grade material. This chassis is developed for all asphalt conditions. The narrow chassis is only 84mm wide with a variety of chassis flex adjustments that help to generate exceptional traction and give excellent steering characteristics.
The 2.0mm aluminum flex chassis is CNC-machined from premium Swiss 7075 T6 aluminum and then black coated. The narrow chassis is also 84mm wide and features special cut outs that provide the desired chassis flex characteristics. The bottom edge of the chassis is tapered to reduce contact between the chassis and the ground to improve cornering speed. |
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| Suspension. |
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| The X4’24 suspension components are completely redesigned with improved inner shock position with ultra-low CG. This new configuration uses new lower & upper arms, new upper clamps & lower bulkheads, new anti-roll bars, steering & ARS plates and new shock holders. |
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| Suspension Arms. |
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| The CFF arms create a calm and stable feel on the track while remaining extremely sharp and responsive. The new suspension creates great traction, improves cornering speed, and provides quick reactions to driver input. The result is greater driver confidence that is critical for improved lap times. |
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| Upper Arms. |
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The new upper arm shape conforms around the inner shock position for proper clearance without compromising strength and improve steering and both forward traction and lateral grip. The updated design also improves durability and eliminates radial play for maximum precision and control from the upper arms.
The graphite and aluminum versions of the X4’24 come with specifically chosen hardnesses of suspension arms to match the typical conditions, and both are compatible with all X4’24 arm options for additional tuning versatility.
X4’24 Graphite Edition includes Soft upper arms
X4’24 Aluminum Edition features Medium upper arms |
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| Inner Shock Mounting. |
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| All-new inner shock mounting locations improve the rolling characteristics & cornering consistency, as well as optimize flex and reducing twist under dampening. Front suspension moves the shock position behind the drive shafts for more precise steering response and improved steering characteristics. Rear suspension moves the shock position in front of the drive shafts for improved traction. |
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| Shock Holders. |
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Versatile new shock holders use shims for adjusting the shock position in more precise shock angle increments. The rear shock holder offers an Active or Fixed dampening setting in addition to the shock angle. All shocks are located 4.5mm lower, improving CG, cornering speed and stability, while also making the car easier to drive and more resistant to traction rolling.
Simplified shock mounting uses a captured mounting stud secured to the shock holder with a special setscrew. It is not necessary to use thread lock as the setscrew will keep the stud secure even during shock install/removal. |
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| Rear Active Dampening Cornering Effect. |
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| All-new rear shock holders offer Active or Fixed dampening setting alternatives. The Fixed setting is the traditional shock mounting method, while removing the M3x8 screw allow the Active holder bracket to pivot, softening the rear suspension dampening to improve off-power steering and increase rotation in high traction conditions. |
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| Shock Holders Flex Settings. |
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| Front & rear shock holders have three different mounting options for different chassis flex alternatives. The flex options have a significant impact on handling and are used to fine-tune handling for different conditions. |
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| Bulkheads. |
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All-new bulkheads integrate with the new shock holders, new ARS linkage mounting position and new rear body post holders. The new bulkheads position the anti-roll bars for their under arm mounting points for ultra-low CG. Both front & rear bulkheads include attachment points to secure the shock holder to the bulkhead to control flex and adjust responsiveness.
The bulkheads use centering pins for easier positioning on the chassis and for increased rigidity and consistency.
The bulkheads feature two solid axle/diff height positions that were developed for different surfaces. The lower position is mainly designed for carpet, and the upper position is more common on asphalt. The anti-roll bar mounting position keeps the wire bar placed under the suspension arms for ultra-low CG.
Made from premium Swiss 7075 T6 aluminum, black anodized. |
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| Upper Clamps. |
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| Heavy duty upper clamps improve durability in hard crashes and accommodate the new inner shock mounting system. |
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| Motor Mount. |
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| The new motor mount features 3mm centering pins instead of 2mm, for improved durability in serious crashes. The motor mount features an extra front attachment point developed for US black carpet, improving the stability and consistency of the car in these high grip conditions. |
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| Motor Mount Flex Adjustment. |
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| The motor mount is a vital part of the X4 Multi-Flex settings. The motor mount attaches to the chassis using various combinations of five possible screw locations. Two are placed in front of the layshaft axis and the other three screws are located to the rear. Up to four screws can be removed for chassis flex adjustment. |
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| Steering & ARS Plates. |
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Updated front & rear steering plates work with the new arms and shock positions.
The new steering plates move the Ackermann position further out for more precise car control and make the X4’24 easier to drive.
The ARS plates move the toe link mounting position further forward for improved rotation in high traction conditions. |
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| Anti-roll Bars. |
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| The ultra-low CG anti-roll bars are attached from below the suspension arms with considerably reduced mounting hardware and material. The wobble-free anti-roll bar height is easily & comfortably adjusted via set screw from the top of the arm. |
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| ECS BB Drive Shafts. |
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| Our unique ECS system uses a redesigned drive shaft case with a C clip groove to secure the new aluminum pin retainer. Thanks to this system, no set screws are needed to capture the coupler pins, making the ECS assemblies easier and more convenient to assemble, and more reliable. The driveshaft service life is increased as the pins float freely in the joints, ensuring smoother rotation and improved cornering speed. |
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| Rear Body Mounting System. |
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Extra thick 4mm graphite rear body post holder improves durability and vehicle stability from the reduced body post flex. The body post holder features 6 holes with 1.1mm spacing for rear body posts plus a second bulkhead mounting position between the 1.1mm spacing for easier and more precise mounting of horizontal rear body posts. The new higher bulkhead position also provides improved body post positioning for taller VTA bodies.
Body posts can be installed in a traditional vertical position or the popular horizontal orientation on the body post holder for a different feel on the track. The carbon fiber holder is machined from strong 4mm thick material and is directly connected to the rear bulkheads. |
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| Upper Bumper Brace. |
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The system controls the positioning of the pack in the chassis while at the same time reducing the battery pack’s impact on chassis flex, resulting in more consistent handling and stability.
Smart battery holders are specifically designed for LiPo batteries and are reinforced for harder impacts. The battery holders prevent the batteries from moving under racing conditions and crashes. |
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| Battery Holders. |
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The tweak-free, fully adjustable Quick Battery Mounting System was refined to match the new chassis layout. The Quick Battery Mounting System offers simple and secure battery installation without tape and without adverse effects on chassis flex.
The system controls the positioning of the pack in the chassis while at the same time reducing the battery pack’s impact on chassis flex, resulting in more consistent handling and stability.
Smart battery holders are specifically designed for LiPo batteries and are reinforced for harder impacts. The battery holders prevent the batteries from moving under racing conditions and crashes. |
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