Team Associated’s B4 is the latest generation of the 5-time IFMAR World Championship-winning heritage of RC10 buggies.
As far back as 1989, there were grainy spy photos and a few sporadic sightings of a radical new buggy under development by Team Associated. Then at the 1991 IFMAR World Offroad Championships in Detroit, the Team unveiled their hand-built prototype cars, noted for their distinctive front suspensions and unusual shock mounting locations. Masami Hirosaka piloted the RC10 buggy to the World Championship win, and the prototypes were whisked back to Team Associated's California R&D department (Area 51) where they would not emerge for over a decade.
Now, Team Associated brings years of development and new technologies together by introducing the RC10B4 buggy . . . the most adjustable, tunable RC10 buggy ever produced. 
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Here to Order RC10B4 Team Kit This all-new buggy reintroduces the forward-swept front end and rear-mounted shock configuration of the original car, optimized with the new co-planar Ackermann steering geometry. This new suspension design provides maximum front-end clearance and minimizes bump-steer while maintaining correct buggy Ackermann angles. Trailing front axle or optional inline steering blocks can be used to adjust steering response. The B4 chassis provides a super-low center of gravity by lowering the motor, battery, wing and even the shock mounting positions, enabling much higher cornering speeds and stability during jumping and through bumpy sections of the track. The adjustable-angle rear wing mounts and even the transmission case are now integrated into the chassis/suspension structure. The symmetrical suspension arm design has all four arms being the same length, and "captured" hinge pins so that no e-clips are used. The transmission has also been optimized into an ultra-compact package, and now uses the same 2.6:1 higher torque-capacity differential as the RC10GT. A double-sided slipper assembly (first prototyped by Team Associated in 1989) has been designed with higher torque capacity, easier assembly, and lower rotating mass than comparable double-sided slippers. This provides a finer adjustment range and more efficient slipper operation. The B4 uses new offset-front wheels and "wide-body" front tires. The rear wheels are now interchangeable with other manufacturer’s buggies, enabling pre-mounted tires for standardized "spec" class racing to easily be used. The B4 is topped off with an all-new, super low-profile body and adjustable rear wing, providing a sleek, aggressive look on the track. The RC10B4 won Radio Control Car Action Reader's Choice 2004 award for Electric Buggy!
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Here to Order RC10B4 Features New front and rear wheels. The front wheel has a new offset and uses wide body type tires. They are also stiffer. The new rear wheel is now interchangeable with other manufacturer’s buggies, allowing spec tires to be mounted.
Inline or trailing front axles. You can use either inline or trailing front axle steering blocks while maintaining correct axle and Ackerman positions.
Most adjustable RC10 ever. You have easy access to all suspension settings. The upper suspension arms have vertical ballstuds front and rear so that you can make fine roll center and camber rise changes. 
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Here to Order New 2.6:1 reduction transmission. The B4 uses the same higher torque capacity differential as in the RC10GT. Entire transmission assembly has been optimized into an ultra-compact package and is now an integral part of the chassis/suspension structure. 
Double-sided slipper clutch assembly. Higher torque capacity double-sided slipper assembly. This provides a finer adjustment range and more efficient slipper operation.
Super-low center of gravity. The motor, battery, body, wing, and even shocks have much lower mounting positions. This gives the B4 buggy a much lower CG for higher cornering speeds and more stability for jumping and the bumpy sections.
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Longer MIP CVD axles. Longer CVD dog bones and axles have been designed into the rear suspension to push the B4 out to maximum legal width. The longer CVDs also increase rear traction. The RTR substitutes rugged steel dogbones.
Optimized front suspension/steering assembly. We designed the new "forward swept" front suspension in conjunction with the "co-planer" Ackerman steering geometry. This new suspension design provides maximum front end clearance and minimum bump-steer while maintaining correct buggy Ackerman settings.
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Symmetrical suspension arm design with captured hinge pins. All four suspension arms are the same length. All of the suspension hinge pins are captured so that no E-clips are needed.
Impact-absorbing wing mounts. The rear wing has two impact-absorbing mounts that also support the rear suspension assembly. The wing angle is adjustable.
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