Wheels SEISMIC Alpha 75.5mm 74A Plum Defcon

The Seismic Alpha 75.5mm 74A Plum Defcon Wheels are designed for modern downhill racers seeking maximum speed, traction, and controlled slides. Their 75.5mm diameter and 62.5mm width provide momentum for straightaways while maintaining agility for technical pre-drifts and quick edge-to-edge transitions. The 62mm running surface ensures unparalleled traction, stability, and grip through even the hardest corners. Made with Seismic’s Defcon™ urethane, these wheels offer Guinness World Record speed, ultra-high rebound, and slow, consistent wear. The 74A Plum durometer, a Chase Hiller pro signature wheel, provides a plush, velvety roll with extra edge hold, making them ideal for racing on rougher roads while maintaining aggressive yet smooth slide initiation and fast braking power. Built around Seismic’s Fusion™ core, the largest and most supportive hub ever used in a wheel of this size, these wheels offer maximum edge support, absolute mechanical lock with the urethane, and enhanced in-slide feedback. The bearing seat, offset by 6.5%, ensures progressive lip engagement and consistent wear, while the square outside edge and straight-cut inside edge maximize grip and control under extreme G-forces. Specifications : Size : 75.5mm x 62.5mm Color : Plum Durometer : 74A Formula : Defcon™ (Guinness WR speed, ultra-high rebound) Running surface : 62mm Bearing seat : Offset 6.5% (for progressive lip engagement) Profile : Square outside edge, straight-cut inside edge Weight : 8.125 oz per wheel Sold as : Set of four wheels Designed for elite downhill racers looking for maximum speed, control, and superior grip, the Seismic Alpha 75.5mm 74A Plum Defcon Wheels provide the ultimate combination of high-performance traction, smooth slides, and fast braking power for aggressive racing.