RX28WE World’s Edition Chassis Kit 1/28 scale competition chassis

The RX28WE is the World’s Edition of the Gen 3 platform, on the narrower, lower chassis that carried Reflex Racing through the 2026 season. Same car, proven across the classes that actually get raced.

In 2026 the RX28 won the PN Racing North American Championships in 2WD Modified and Modified Pan Car. It took 1st in 2500 Hardbody at the Team Associated International Race in Las Vegas. At 28SRA it won Pan Car Modified and the 2500 class, and finished 1-2 in the 3500Kv final. Modified, pan car, 2500, and 3500Kv. One platform, not a one-class special.

The WE plate is pocketed deeper under the servo and battery, so mass sits lower and a plastic-body car can run closer to 160 g. The narrower tub clears the surface sooner in roll, so direction changes stay clean instead of rubbing the chassis flat. Reverse-mounted side links let you drop the rear roll center further when the car starts traction-rolling. The center shock moves forward on the plate for a smoother, more forgiving rotation through the middle of the corner.

Trackside, the two-piece tweak brace comes apart for side-spring changes without tearing the rear end down, and the one-piece braced motor mount holds alignment harder than the previous pod. Optional long links and the optional long-shock conversion are in the box when the layout wants a longer wheelbase or a different shock layout.

Optional tungsten plates under the servo and under the battery are available separately when a lexan class needs the weight back up without giving the low center of gravity away.

2026 results

• 1st, PN Racing North American Championships, 2WD Modified
• 1st, PN Racing North American Championships, Modified Pan Car
• 1st, Team Associated International Race, Las Vegas, 2500 Hardbody
• 1st, 28SRA Pan Car Modified
• 1st, 28SRA 2500Kv Pan Car
• 1st and 2nd, 28SRA 3500Kv Lexan final

On the Gen 3 platform

• 1 mm longer front arms, integrated sway bar, and 3-screw caster
• Upper-arm hinge-pin height for camber gain and roll center
• Integrated front shock tower with shim ride-height
• Low-profile big-bore front shocks
• Lower rear end, with the motor dropped 0.8 mm versus the previous mount
• Side dampers lowered and screw-mounted, tweak brace dropped 1.25 mm
• Standardized ball studs for faster pit work

Specifications

• Wheelbase: 98 mm
• Front track: 76–80 mm
• Rear track: 77–80 mm
• RTR weight: about 145–170 g, depending on body and electronics. Plastic-body builds can approach 160 g on the WE plate.

Kit includes

• RX28WE Gen 3 chassis kit
• World’s Edition narrow steel chassis
• Two-piece tweak brace
• One-piece braced motor mount
• Two sets of plastics, black and gray
• Ball differential and gear differential
• Front bumper and body posts with mounting hardware
• Optional long links
• Optional long-shock conversion
• One set of wheels and tires

Required to complete

• Electronics (servo, ESC, motor, receiver, battery)
• Body
• Tools, threadlocker, and diff grease

**Optional tungsten under-servo and under-battery plates are sold separately for lexan classes.

***Prototype shown, titanium screws, aluminum front shock pistons and raised bumper set not included (includes traditional CF Bumper)

Also, Kit comes with 11mm rear wheels and tires as well as 8.5mm front wheels and tires.

Recommended Electronics:

• Motors (#27503 SONIC 1525 2500kV Micro Brushless Motor)
  (#27504 SONIC 1525 3500kV Micro Brushless Motor)
  (#27505 SONIC 1525 4500kV Micro Brushless Motor)
• Battery (#27620 REEDY Stockstar 480mah 65c 7.4v 1:28 Stick)
  (#27610 REEDY POWER 400mAh 60C 7.4V 1:28 Stick Battery)
• Servo (#27175 REEDY RS0305A Micro Hi-Speed Servo)
• ESC (#27045 REEDY BLACKBOX 300R Competition Micro ESC)
• Charger (#27203 Reedy 1416-C2L Dual AC/DC Competition Balance Charger)

PSP Racing Xpress Pixel Z1 — 1/28 Competition Micro Racing Car Kit

Xpress's entry into the competitive 1/28 scale market, combining race-bred design with an economical price point. Stability and ease of assembly were top priorities throughout the Pixez Z1's development.

Extra-long suspension arms slow camber change through corners, giving drivers easier, more predictable control. The gear differential is simple to build and delivers consistent performance on high-grip RCP tracks. Included body mounts follow the traditional mounting pattern, so bodies install without modification.

Features:

• Bevel Gear Differential
• Direct Servo Horn Steering System
• Grease-Filled Side Dampers
• Extra-Long Upper Suspension Arms
• Adjustable Caster Settings
• Narrow Main Chassis Plate
• Droop-Adjustable Center Damper
• Shim-Adjustable Rear Ride Height
• 21x45mm Battery Compartment

Specifications:

• Wheelbase: 98mm

Includes:

• Pixez Z1 1/28 Competition Micro Racing Car Kit (1 pc)

Required (sold separately):

• ESC
• Motor
• Servo
• Body
• Battery
• Tires

The lightweight carbon fiber chassis works together with strategically positioned brass components to achieve the ideal combination of chassis flex, weight distribution, and center of gravity. This combination provides excellent traction, predictable handling, and consistent performance across a wide range of track conditions.

Another key feature of the XB-SF is its front ride height adjustment system. Precision stainless steel shims are installed between the carbon chassis and the Simple Front assembly, allowing front ride height to be adjusted quickly and accurately without affecting camber, caster, or any other suspension settings. This enables fast, repeatable setup changes while preserving the car’s suspension geometry.

The redesigned damper plate features a new side spring geometry that has been carefully optimized to improve chassis rotation while maintaining stability and rear-end traction. By relocating the side spring mounting positions, the XB-SF delivers a more responsive feel through corner entry and mid-corner, resulting in improved rotation and overall balance.

To preserve the natural flex characteristics of the chassis, the XB-SF features a floating servo mount that prevents the servo from influencing chassis twist. This allows the chassis to flex exactly as intended, resulting in more consistent handling and improved cornering performance.

The redesigned center pivot assembly features a simplified design with improved precision, ensuring smoother suspension movement, easier maintenance, and greater consistency on the track.

The XB-SF also features the Xbility 3-Point Ball Differential, a design pioneered by Xbility that has become recognized for eliminating wheel play while maintaining exceptional drivetrain precision. Its unique three-point wheel mounting system ensures perfect wheel centering, smooth operation, efficient power delivery, and outstanding reliability.

The newly developed V2 motor mount lowers the motor position by 0.5 mm, reducing the center of gravity and improving chassis balance. Complementing this is the V2 brass left motor mount, which strategically adds weight where it is most effective to optimize left-to-right weight distribution and achieve the ideal chassis balance.

The XB-SF kit is supplied with one pair of 11 mm rear wheels, one pair of 8.5 mm front wheels, and one pair of 23 mm front side discs, providing the ideal wheel package for the Simple Front suspension straight out of the box.

Every component of the XB-SF has been designed with a clear purpose: to simplify assembly and maintenance while maximizing performance. The result is a chassis that is easy to understand, easy to tune, and capable of competing at the highest level.

Key Features
Innovative Simple Front suspension.
Internal O-ring knuckles with integrated damping.
Camber adjustment by interchangeable king pins.
Caster adjustment by interchangeable carbon caster plates.
Lightweight carbon fiber chassis.
Strategically positioned brass components for optimized flex, weight distribution, and center of gravity.
Front ride height adjustment using precision stainless steel shims.
Front ride height adjustment without affecting suspension geometry.
Redesigned damper plate with optimized side spring geometry for improved chassis rotation.
Floating servo mount that preserves the natural chassis flex.
Simplified high-precision center pivot assembly.
Xbility 3-Point Ball Differential with zero wheel play.
V2 motor mount with a 0.5 mm lower motor position.
V2 brass left motor mount for optimized chassis balance.
Easy to assemble, maintain, and tune.
Competition-level performance.
Includes
1 × Xbility XB-SF 1/28 RWD Chassis Kit (Without Servo)
1 × Pair of 11 mm Rear Wheels
1 × Pair of 8.5 mm Front Wheels
1 × Pair of 23 mm Front Side Discs

Part Number: XB-SF

RC28R with Body and Tires Team Kit

1:28 Scale 2WD Electric On-Road Competition Kit

SKU: #20165 + Body and Tires

Overview

Introducing the Team Associated RC28R Team Kit — a compact, high-performance on-road race car designed with the same AREA 51 engineering precision found in every Team Associated product.

Though small in scale, the RC28R delivers big performance in an easy-to-set-up package, perfect for competitive indoor racing or fun in tight spaces.

Key Features

• RADBODY Mako X clear body and tires included

• Fixed-arm front suspension with optional molded upper arms for adjustable caster and camber

• Front bulkhead design allows quick upper arm changes with consistent alignment

• Optimized steering geometry and adjustable servo mount to fine-tune Ackermann

• Steel chassis plate for a low center of gravity

• Quick-access battery holder – remove the battery without disturbing the center shock

• Torsion-style side links replace traditional side springs (soft, medium, and hard options included)

• Adjustable rear pod roll center inserts to tune chassis roll based on grip level

• Side damper tubes for optimized roll geometry

• Threaded aluminum center shock with adjustable droop and spring collar

• Two-piece rear pod with adjustable axle heights using Factory Team carbon fiber shims

• Gear differential included, compatible with various aftermarket options

• Hard plastic and polycarbonate body mount options included

• White wheels compatible with optional front wheel flanges to fine-tune steering response

• Universal front bumper included

• Backed by Team Associated’s quality, distribution, support, and customer service

Tuning & Setup Highlights

• Pitch, roll, and droop can be finely adjusted via the center shock and damper system

• Easily change axle height and ride height for different tire diameters

• Tune caster, camber, and Ackermann for precise steering feel

Recommended Tools & Accessories

To assemble and maintain your RC28R, you may need:

• Silicone Shock Fluid (Refer to Team Associated catalog)

• Silicone Diff Fluid (Refer to Team Associated catalog)

• Body Scissors (AE Part #1737)

• Reamer / Hole Punch

• FT Wrench Set (AE Part #1519)

• Hobby Knife

• Needle Nose Pliers

• Wire Cutters

• Soldering Iron

• Calipers or Precision Ruler

• Drivers:

  • 1.5mm hex

  • .050” hex

  • 1.3mm hex

  • 0.9mm hex

  • 4.5mm nut driver

  • PH00 driver

Specifications

• Scale: 1:28

• Drive: 2WD Electric On-Road

• Chassis: Steel plate with carbon fiber shims

• Suspension: Fixed-arm front / torsion side links rear

• Shock: Threaded aluminum center shock

• Body: RADBODY Mako X clear

• Wheels: White (tunable with front flanges)

Compact. Tunable. Built to race.
The RC28R Team Kit delivers professional-level performance in a small-scale package — designed for racers who demand precision, adjustability, and fun.

Introducing the all-new GX28 from Reflex Racing — a purpose-built 1/28 scale racing platform engineered for serious competitors who demand precision, adjustability, and podium-proven performance in a compact package.

Built on the championship-winning DNA of Reflex Racing, the GX28 carries forward the legacy of multiple World Champions and dominant race results across the globe. From our record-setting RX28 series to the groundbreaking FX28 Formula platform, Reflex Racing continues to push the boundaries of 1/28 scale engineering with the same relentless focus on innovation and on-track excellence.

Key Features:

•  Linkless rear end suspension derived directly from the FX28, delivering ultra-smooth operation, reduced slop, and exceptional traction with minimal maintenance.

•  Highly adjustable sliding king pin front end featuring aluminum knuckles with Delrin sleeves for precision and smoothness, paired with an aluminum bulkhead and carbon fiber lower arm for lightweight strength and optimal rigidity.

•  Extremely narrow chassis with an ultra-low center of gravity, optimized for razor-sharp cornering and maximum stability at speed.

•  Compatible with RX28 front double A-arm suspensions, allowing you to easily swap between sliding king pin and double A-arm front ends.

•  Compatible with 24mm batteries, providing flexible power options and optimized weight distribution.

•  Ball differential engineered for ultra-smooth power delivery, precise throttle control, and long-lasting performance under the most demanding race conditions.

•  Premium components throughout, including high-quality hardware and precision-machined parts that ensure durability, consistency, and race-ready reliability.

Whether you’re chasing titles in 1/28 scale pan car racing or building the ultimate custom setup, the GX28 delivers the handling, tunability, and reliability that have made Reflex Racing a dominant force in mini and micro racing for years.

Reflex Racing — Where Winning DNA Meets Affordable Excellence.

Ready to take your racing to the next level? The GX28 is the platform you’ve been waiting for.

Dimensions:

• 98mm Wheelbase

• -145g-170g weight RTR Depending on body and Electronics

• 69mm to 78mm Rear Track Width

• 75mm to 79mm Front Track Width

Need to Complete:

• Body 

• Electronics

            Motor, Lipo Battery, ESC, Receiver and Servo (Please note, the provided servo horn is designed to work with the Reflex Racing RRE007 Servo 20T Spline.  Additionally, the  AGFC A06CLS V1, the GL, the                  PN Anima and the Atomic Servo (it is a little bit of a tight fit but same sized spline)will fit as well.

****ELECTRONICS ARE NOT INCLUDED!!!

IN STOCK NOW!

RX28SE Gen 3 – 1/28 Scale RC Chassis Kit

Precision. Versatility. Style.

Get ready to take your racing program to the next level with the RX28SE Gen 3 — the ultimate 1/28th-scale RC car chassis designed for enthusiasts who demand performance without compromise. This third-generation platform is built to dominate any surface with fine-tuned handling, premium materials, and unmatched tuning potential.

Key Features & Upgrades

Revamped Front-End:

• 1mm longer front arms for enhanced stability

• All-new sway bar system for sharper cornering response

• Adjustable caster (3-screw system)

• Integrated front shock tower with shim adjustment

• Adjustable upper arm hinge pin height for custom camber gain and roll center tuning

• Low-profile big bore shocks & springs for buttery-smooth handling and high grip

Rear-End Innovations:

• Lower CG Rear Design for increased agility

• New motor mount – lowers motor by 0.8mm

• 3-screw damper mount – simplifies rear suspension maintenance

• Tweak brace dropped by 1.25mm for enhanced cornering performance

• Shorter side springs & thinner perches

• Side dampers lowered by 3mm, now screw-mounted to motor mount

• Smaller center shock spring, collar, and perch

• Pinned Rear Motor Pod Plate – improved precision and durability

Signature SE Upgrades:

• 24mm Steel Tub Chassis – Industry-leading rigidity, low CG, and durability

• Includes both Premium Ball Differential & Gear Differential

• Two sets of plastics included: Black & Gray (excluding lower arms)

What's Included:

• RX28SE Gen 3 Chassis Kit

• One Set of Wheels & Tires

• Steel Tub Chassis

• Ball & Gear Differential

• Black & Gray Plastic Parts (excluding lower arms)

Note: Electronics, body, and mounting hardware are NOT included.

Specifications:

• Wheelbase: 98mm

• Weight (RTR): 145g–170g (depending on body & electronics)

• Rear Track Width: 69mm–78mm

• Front Track Width: 72mm–75mm

Required to Complete (Not Included):

• Body & Mounting Hardware

• Electronics:

  • Motor

  • LiPo Battery

  • ESC (Electronic Speed Controller)

  • Receiver

  • Servo

Servo Compatibility:

• Reflex Racing RRE007 (20T Spline) – Recommended

• AGFC A06CLS V1

• GL Racing Servo

• PN Anima

• Atomic Servo (tight fit, but correct spline size)

Important Notes:

• ELECTRONICS ARE NOT INCLUDED

IN STOCK!

RX28D Gen 3 – 1/28 Scale RC Car Chassis Kit

Redefine Performance. Precision. Possibility.

The RX28D Gen 3 is here to raise the bar for 1/28-scale RC racing. Built for drivers who demand speed, agility, and pinpoint control, this third-generation chassis is fully re-engineered to dominate the track with cutting-edge design and next-level adjustability.

🔧 Key Upgrades & Features

🚗 Front-End Enhancements:

• 1mm longer front arms for improved stability and smoother handling

• Integrated sway bar system for surgical cornering precision

• Adjustable caster (via 3 screws)

• Integrated front shock tower with shim-based ride height tuning

• Upper arm hinge pin height adjustment for custom camber gain and roll center

• Lightweight & durable plastic knuckles – new design, less weight, more strength

• Low-profile big bore shocks & springs – ultra-smooth, responsive handling

🏁 Rear-End Innovations:

• Lower CG Rear End for high-speed stability

• New motor mount – lowers motor by 0.8mm

• 3-screw damper mount – simplifies rear suspension servicing

• Tweak brace lowered by 1.25mm for improved response

• Shorter side springs + thinner perches

• Side dampers lowered by 3mm, now screw-mounted to motor mount

• Smaller center shock spring, collar, and perch

• Pinned rear motor pod plate – boosts durability and rear-end precision

🛠️ Ease of Maintenance:

• Standardized ball stud hardware used throughout

• Simplifies adjustments and part replacements

• Designed with trackside tuning in mind

📦 What's Included:

• RX28D Gen 3 Chassis Kit

• One set of wheels and tires (pre-mounted)

⚠️ Note: Electronics NOT included. See below for compatibility.

📏 Specifications:

• Wheelbase: 98mm

• Weight (RTR): 145g–170g (depending on body & electronics)

• Rear Track Width: 69mm–78mm

• Front Track Width: 72mm–75mm

🔌 Electronics Required (Not Included):

• Motor

• LiPo Battery

• ESC (Electronic Speed Controller)

• Receiver

• Servo

✅ Compatible Servos:

• Reflex Racing RRE007 (20T Spline) – Recommended

• AGFC A06CLS V1

• GL Racing Servo

• PN Anima

• Atomic Servo (tight fit, but compatible spline size)

🛠️ You Will Also Need:

• Body + Mounting Hardware

• Compatible electronics listed above

🚨 NOTE:

ELECTRONICS ARE NOT INCLUDED! This kit is designed for experienced builders who want a customizable, high-performance platform.

Presale on Restock

XbilitY XB-F1 – Precision, Innovation, and Performance in 1:28 Scale

The XbilitY XB-F1 was designed to raise the standard in 1:28 scale racing, bringing fresh solutions, real adjustability, and a strong focus on track performance.

Key Features:

New front-end with steering knuckles inspired by 1/8 on-road
Easily adjust camber and track width for sharper, more linear steering response.

Easy front and rear track width adjustment
Quick and simple adjustment of both front and rear track width.

Multiple roll center and camber gain options
Fully tunable front geometry to suit different driving styles and track conditions.

Revolutionary 3-point ball differential
Solves common issues with wheel mounting and ensures smooth, consistent performance.

Battery position adjustment (fits 24mm or soft packs)

Fully aluminum servo saver with Ackermann adjustment
Designed to protect the servo from impacts, always return to center, and allow Ackermann tuning directly on the servo saver.

Adjustable front and rear spoilers
Angle-adjustable front and rear spoilers to fine-tune downforce for different track conditions.

Machined carbon chassis
Engineered for the perfect balance between strength and flexibility.

Included in the kit:

Complete F1 body shell
2pcs 14mm rear rim
Printed manual with setup and assembly guidance

XbilitY One – Precision, Innovation, and Performance in 1:28 Scale

The XbilitY One was designed to raise the standard in 1:28 scale racing, bringing fresh solutions, real adjustability, and a strong focus on track performance.

Key Features:

• New front-end with steering knuckles inspired by 1/8 on-road
  Easily adjust camber and track width for sharper, more linear steering response.

• Multiple roll center and camber gain options
  Fully tunable front geometry to suit different driving styles and track conditions.

• Revolutionary 3-point ball differential
  Solves common issues with wheel mounting and ensures smooth, consistent performance.

• Battery position adjustment (fits 24mm or soft packs)
  Fine-tune the car’s balance by shifting battery position mechanically — no electronics needed.

• Three rear bench leverage points
  Adjust rear response without changing track width.

• Steel chassis
  Delivers high durability and ideal weight balance for exceptional cornering and braking stability — with a 4WD-like braking feel.

Included in the kit:

• 2pcs  11mm+3 rear rim (front rims can be from any brand)

• 2pcs 14mm rear rim (front rims can be from any brand)

• Printed manual with setup and assembly guidance

While retaining elements of the excellent MR-03 layout, the new MR-04EVO2 chassis achieves significant performance improvements with changes to the front suspension and a lower C of G that work in synergy with a sensored brushless motor. Both narrow and wide tread settings are available by changing the lower and upper plates on the front as well as the steering tie rod. Adjustable wheelbase allows chassis setting according to body type.

While camber angle is optimized during cornering with the swing of the current upper arm design, the front suspension uses the new kingpin-integrated knuckle to further improve camber stability. Geometric revision of caster and trail etc. delivers more linear maneuverability. New spec front springs for the MR-04 with different hardness are available as options.

Front knuckle design features integrated kingpin with optimized clearance with the kingpin ball for smoother operation. Ball bearings have been changed to 3mm internal diameter for lower rotational resistance.

All 7 ball bearings are 3mm internal diameter for lower rotational resistance to minimize friction loss.

Lower mounting of the AAA batteries on the chassis realizes a lower center of gravity compared to the MR-03. In combination with the chassis shape, this improves stability through corners as well as enhancing speed and control.

Ball differential included as standard optimizes the rotational differences between left and right rear wheels when turning. Also provides moderate slip action to improve traction when excessive load is applied. Silver clear anodized finish to aluminum parts creates a formidable style to match performance.

The new unit also supports high-speed communication with various high-end transmitters and receivers to realize unprecedented control response. Achieves transmission speeds of 0.99ms with KO units (ADV mode) and 0.9ms with Futaba units (EVO2 mode). *Previously 2.6ms ~ 3.0ms

MWX 1/28 2WD Racing Kit – Team Edition

Premium Performance. Factory Upgrades Included.

The MWX Team Edition is the ultimate 1/28 2WD racing platform, built for serious racers who demand precision, adjustability, and performance right out of the box. With over $180 in included upgrades, this kit delivers race-winning features without the need to chase optional parts.

Key Features:

• Ultra Low CG chassis design for maximum corner speed

• Low-Slop Geometry for consistent, predictable handling

• Low Roll Center Front Suspension (High Roll Center plate optional)

• Servo Saver Delete included for direct steering response

• 1pc Big Block Floating Servo Mount

• Dual Center Shock system for enhanced rear stability

• Titanium Kingpins (now included!)

• Upgraded Side Shafts with Rainbow Collars

• Aluminum Tie Rods for added strength and tuning

• Full Linear Spring Set included (Green, Pink, Yellow, Purple, White)

• Unique No Side Link Design

• Hard Body and Lexan Mounts included

• MWX Slipper Differential

• Laser-Engraved Steel Team Edition Chassis

• Delrin Lower Perch Mounts

• Pinned Servo Mount & Revised Gate Geometry

• Original MWX-Style Wheelset

• 0/1 and 0/3 Camber Plates

• ZS Knuckles and ZS Axles

• +2 Shock Mount for increased rear grip

• Carbon Rear Pod & Integrated Diffuser

What’s Not Included:

• Tires

• Electronics

• Body posts

• Bodies

This is the most complete MWX R1 1/28 kit to date—ideal for racers who want factory-level performance and all the best parts in one box.