Watch GNCC XC1 Pro Walker Fowler dial in his Yamaha Blu Crew WFR backed YFZ450r out in the beautiful state of Florida. With the switch to GBC Motorsports tires, Walker is cool, calm, and collected, with his sights set on the entire 2018 series and beyond. Running the popular combination of our XC Master Front tires and Ground Buster 3 rear tires, Walker hasn't had any issues while putting our tires through intense race speeds and brutal courses.