History / About
E-Stub (“E” for “Extreme”) is an enlarged evolution of July YoYo’s long-running flagship “STUBBORN.” It has a larger diameter and wider body than STUBBORN, increasing string surface, power, and anti-tilt stability for long, planted spins. Explicitly a competition-minded model, and the base from which the Park Sol signature “Solute” was itself derived. July YoYo labels this a pre-production model whose specs may change before official release.

