D427 Only for Bob Dunlop developed the D427 exclusively as original tires for the 2008 Harley - Davidson Fat Bob®. Because a unique machine requires a unique tire. The D427's tread design offers a classic look while being full of current Dunlop technology and advanced know-how. This perfectly complements the performance and handling of the Harley-Davidson Fat Bob+®. Harley-Davidson is a true iconic brand and motorcyclists demand the most from their Harley-Davidson machines. For decades, Dunlop was the exclusive tire manufacturer for the American motorcycle legend. Today Dunlop carries a wide range of tires for the entire Harley - Davidson range. This gives every rider the real riding experience that William Harley and Arthur Davidson dreamed of when they built their first motorcycle. Main advantages: Original tires for the 2008 Harley-Davidson Fat Bob® The D427 is one of the tires of the Dunlop® - Harley - Davidson® tire series (H/D) Classic tread design with modern Dunlop handling characteristics Good performance in all weather conditions.