David jefferies competed in a range of racing classes including the grand prix world championship in 1993 and the world superbike championship in 1993 and 1995 he was the british superstock 1000 champion twice in the previous three years this is not an official product and is not in any way endorsedt shirt design reads those who risk nothing do nothing achieve nothingour crew neck short sleeved mens t shirts are 100 premium cotton in a soft pre shrunk jersey knit our womens t shirt