STRADIAIII is a new-generation reclining seat that combines the holdability required for circuit driving with the convenient and comfort required for everyday use at a high level.

STRADIAIII has a newly designed monocoque body shell with a bone frame and ZETA IV designed by 3D-CAD. The seat rigidity and strength of STRADIAIII have been greatly improved compared to STRADIAII.

In addition, its newly-developed reclining mechanism and one-touch reclining lever, which aim at maximal operability, convenience, and durability, achieve more reliable holdability and comfort by suppressing backlash and vibrations through stepwise adjustments. What's more, a belt hole for a 6-point harness has been newly installed on the back of the seat, which uses a specially designed high-density urethane foam for its seat and thigh cushions.