Sumner’s bike after a “warm-up” lap on the Koppenburg course Share Share to Outside Feed Create a new post with the article attached Copy link Email Share on X Share on Facebook Share on Reddit Gallery Thumbnails | Related Story Sumner’s bike after a “warm-up” lap on the Koppenburg course | Photo: Jason Sumner Sumner’s bike after a “warm-up” lap on the Koppenburg course | Photo: Jason Sumner Gallery Thumbnails | Related Story