15-year-old American karter Sarah Bradley has announced her move to Ryan Perry Motorsport for the remainder of the 2025 season. The Wildwood, Florida resident is leaving the Speed Concepts Racing team to reunite with RPM and will remain with the Sodi Kart chassis.

Radford Racing School and Formula 4 United States Championship (F4 U.S.) will once again host the Radford Racing School F4 U.S. “Karts to Cars” Scholarship School, a joint venture that brings together some of the best karters from around North America to get their first experience in a single-seater racecar. The two-day school will take place December 5-6 at Radford Racing School’s multi-track facility in Chandler, Ariz.

As part of the WKA Mid-Season Shootout, the competitors gaining the most cumulative points in Mini ROK, Junior ROK, Senior ROK and ROK Shifter after the Orlando, Florida, and two Charlotte, North Carolina events will receive ROK Cup Superfinal invitations. The rule that classes must average ten entries to receive these invitations has been removed ensuring that all class champions from these respective divisions will be headed to Italy as part of the WKA and ROK Cup USA partnership.