The Sparco 051STB42 is a thick wheel adapter designed for BMW vehicles, providing precise wheel positioning and adequate spacing with a thickness of 16 mm. This adapter is compatible with several BMW models, including the M3 series (E30, E36, E46, E90), the M5 series (E34, E60), and the 5 series (E34, E60, E61). Made from durable materials, it offers reliable performance and maintains proper wheel alignment for improved vehicle handling. The 16 mm thickness allows for optimal clearance for brake and wheel mounting while preserving structural integrity. This component is manufactured to precise specifications with the model number 051STB42, ensuring a secure fit between the wheel hub and wheel assembly. The design focuses on compliance with vehicle safety standards and enables correct wheel installation with aftermarket or original equipment wheels. Installation requires adherence to specific torque values and alignment procedures for safe operation. This adapter is suitable for automotive enthusiasts looking to adjust wheel positioning for aesthetic or functional reasons without compromising vehicle dynamics. The product is part of the Sparco automotive accessory line, known for high-quality components in the automotive aftermarket sector. Professional installation by qualified technicians is recommended to ensure optimal performance and safety compliance.