Editor’s Note: We have often cited articles or research from Bicycle Quarterly in these pages, and most recently we’ve been following, with particular interest, their studies on tire pressure. Coach Fred Matheny has referenced that research in his recent reviews of the new, wider tires from Compass Bicycles, a BQ sister company. In the back-and-forth communications about those reviews, Bicycle Quarterly Editor Jan Heine offered to distill their tire pressure research and findings into an article specifically for RBR. We happily accepted Jan’s gracious offer. The result follows.