Upgrading to a set of quality tubeless wheels is the number one way to improve the ride of your XC or Gravel bike. Tubeless offers more comfort and control with less rolling resistance, and when it comes to tubeless, nothing beats the easy inflation and performance of Stan's patented Bead Socket Technology. First introduced over 15 years ago, the original Crest rim design with BST helped launch the tubeless revolution. Today's Crest S2 wheels offer quick and easy inflation, the legendary airtight seal, and a 25mm width that offers incredible stability for 40mm to 2.3" Gravel and XC tires.