The HB R8 made its premiere at the 2014 IFMAR World Championships in Japan and made the top ten in the highly competitive event. The R8 is the first car from HB to enter the extremely competitive class of 1:8 on-road and is based on a 5mm thick 7075-series aircraft aluminium chassis, milled out and strategically drilled for weight. More 7075 aluminium is used for the upper and lower bulkheads, which are split horizontally for fast belt changes and easy tension adjustments. Precision machined alloy runs throughout the R8, including the suspension mounts, engine mount and layshaft mount. The tops of the bulkheads are fitted with lightweight carbon fibre shock towers, which are fitted with threaded shocks for fast ride height adjustments. Enhancing the extremely low centre of gravity are the laydown steering and throttle servo positions. Spring-loaded linkage connects the throttle servo to the brake disc and carburettor, while a servo saver and full Ackerman adjustment is integrated into the steering linkage.
Most of the weight of the car, including the quick-view fuel tank and radio battery are centralised for faster weight transition in the corners. Aerodynamic front and rear bumpers increase downforce in the right areas while providing much-needed protection against potentially race-ending crashes. The R8 drivetrain is also optimised for enhanced reliability and efficiency with a centrifugal clutch for perfect throttle response, three Kevlar-reinforced drive belts, lightweight low-friction composite drive pulleys and top-quality bearings throughout.
The suspension is completely adjustable, from anti-roll bars, width, rear body mount and more. The highlight of the pivot-ball style suspension is the two-piece steering knuckle that allows the mechanic to change the kingpin angle very quickly by removing just a few parts, eliminating the need for disassembly and excessive work in the pits.