One of our most popular bikes ever is the radical Honda XL600R we built for action heroine Katee Sackhoff. The feisty single-cylinder, single-sided thumper is depicted by the hyper-talented Kristy Heilenday — black ink on a gray American Apparel tee. In life, there are no guarantees. Except this shirt is guaranteed to be unusually rad. Get two in case you pit one out.