TSW Neptune 20x10 Semi Gloss Black Wheels - 5x112 Bolt Pattern, 40mm Offset - Lightweight Aluminum Alloy Rims for Audi A4, A5, Q5, BMW 3 Series, Mercedes C-Class - Perfect for Street Performance & Custom Car Builds

* The Neptune Flow Formed Wheel is manufactured using a highly advanced production technique called Flow Formed Technology (FFT). The rim of the wheels is forged at high pressure while the wheel is spun at high speed. This alters the molecular structure and enhances the strength of the alloy. The benefit is a much lighter weight than a regular cast wheel. Most importantly, the weight saving is in the outer rim of the wheel which dramatically reduces rotational mass and enhances vehicle performance.