The Toyo Proxes Sport R tire, part number toy178340, is engineered for autocross, time attack, endurance racing, and high-performance driving education events. Designed for drivers and racers who demand responsive handling and dependable consistency, this ultra-high-performance radial tire combines a directional tread pattern, reinforced casing, and high-grip compound to support confident control on the track.
The long contact patch helps maximize tire-to-road engagement, while large shoulder blocks promote cornering stability and precise steering response. A connected center rib supports straight-line control and consistent feedback through acceleration, braking, and transitions. Together, these features help drivers maintain their intended line, improve control, and pursue quicker lap times.
The Proxes Sport R uses a tubeless construction with a black sidewall and is designed for an 18-inch wheel. Its 245-millimeter width, 40-series aspect ratio, 97 load index, and W speed rating provide a performance-focused fitment for compatible applications. The XL construction offers increased load capacity compared with standard-load tires, making this Toyo tire a capable choice for demanding driving environments.
This directional tire must be mounted according to the rotation markings on the sidewall. The Toyo Proxes Sport R is intended for performance-oriented use and should be selected based on vehicle specifications, wheel compatibility, load requirements, and driving conditions.
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