Open for pre-order now

Delivery expected beginning of December 2025

Willspeed's latest innovation, a cantilever suspension conversion kit for the Team Associated RC10 B7 2wd buggy named the Fast Fox.  Designed to lower the center of gravity and centralize weight within the chassis.  

Includes

• Engineered suspension and chassis components for the AE B7
• Lexan body

Requires

• AE B7 Car Kit
• Electronics 
• Wheels
• Tires

Revolution starts here!
Innovation never stops and as refinement continues in model car racing, an alternate step is required to bring the next stage, the new era. 
We at WS pride our selves in both innovative thinking and engineering ability, combining those entities Fast Fox was born. 

Introducing a cantilever suspension system, this provides significant benefits applicable to all tracks and conditions - 

Lower CoG
In race cars, full size and model lower the Center of Gravity reduces bodyroll and increases stability allowing for increased cornering speeds, increased setup ability with less risk of flipping over.
With all the damper mass moved below the upper link level there's a significant amount of mass significantly lower!

Polar MoI 
The unique positioning of the dampers on the Fast Fox is intentional.
Polar Moment of Inertia is about centralising mass. By moving the shocks and their associated mounts inboard we have taken weight out of the ends of the car without adding sprung mass. 
This will both speed up the response of the car when turning but also help the suspension to maintain a steady platform over the bumps.

Aero
The dampers and the towers are not in the way!
Ignore the wheels and tires the frontal area of the car is almost 30% less. This not only reduces drag but, just as significantly, creates a smooth path for the air flow to the wings, the drag is much more effective and adjustable.

Adjustability 
One of the key requirements for the design during the development phase was to create a system that responds just like the kit suspension does. If you have a setup dialled in at your home track you can transfer this to the new chassis and go racing. Then with the improvements detailed above and the extra adjustability that a push rod, inboard suspension system brings you can start finding new gains that simply weren’t available you before..
Cantilevers bring a whole new world of adjustment which has only just been unleashed. 

In a time dominated by small changes this could well be next big milestone change!

What's Included / What's Required
A Team Associated B7 (AS90041 or AS90042) is required to complete the conversion.

Included Components - 
Manual Download

Included Components-

• W3127 - WS Fast Fox B7 Carbon Chassis (1)
  
• W3128 - WS Fast Fox B7 Billet Aluminium Chassis Rail - Left (1)
• W3129 - WS Fast Fox B7 Billet Aluminium Chassis Rail - Right (1)
• W3130 - WS Fast Fox B7 Billet Aluminium Chassis Kick Up Section (1)
• W3131 - WS Fast Fox Rocker Post (4)
• W3132 - WS Fast Fox Rocker Pivot (4)
• W3133 - WS Fast Fox B7 Chassis Rail Carbon Inlay (2)
• W3135L - WS Fast Fox Front Carbon Rocker Plate - LH (1)
• W3135R - WS Fast Fox Front Carbon Rocker Plate - RH (1)
• W3136L - WS Fast Fox Rear Carbon Rocker Plate - LH (1)
• W3136R - WS Fast Fox Rear Carbon Rocker Plate - RH (1)
• W3137 - WS Fast Fox B7 Carbon Wing Plate (1)
• W3139 - 3x7.5x2 Spacer (4)
• W3140 - M3 Ball Joint (8)
• W3143 - WS Fast Fox Rocker Pivot Crush Washer (4)
• W3144 - WS Fast Fox "Formula" Bodyshell (1)
• W3146 - WS Fast Fox Decal Sheet (1)
• Bearing 4X8X3 (8)
• 3X5 Button Head Screws (8)
• 3X6 Countersunk Screws (13)
• 3X8 Button Head Screws (8)
• 3X12 Countersunk Screws (2)
• 3X12 Grub Screws (4)
• 3X14 Button Head Screws (10)
• M3 Nyloc Nuts (12)
• 4mm Spacers (4)