BMW ALPINA GB on Twitter: "@MarketEng 20-spoke @ALPINA_GmbH wheel has to be a contender. This is latest 25% lighter forged design at Frankfurt with exposed valve and bolts. https://t.co/ty8kmYLFBU" / Twitter
The principle of 20 spokes : History of the ALPINA wheel design
BMW 3.0CSL Alpina Magnesium Wheel Centre - 20 spoke, 5 x 120mm PCD | Shop - CCK Historic