Front Wheel Rim (3.5x12), Rotor Bolt Pattern=5x80mm (50mm to adjacent stud) Offset=1.25 in, Shaft ID=30 mm, Silver Fite E-Ton Beamer R2-50, R4-150, Matrix 50, 150 Scooters + others : Get 2 It Parts, LLC offers SAME DAY SHIPPING. FAIR PRICING. SOUTH CAROLINA WAREHOUSING.