The Takeaway: Zipp’s 303 XPLR was built to satisfy the needs of its top gravel athletes and the increasing speeds of gravel racing. Made to fit a 40 to 60c tire, its biggest aero benefit is ...

Now called simply Hunt Carbon Disc, you can pick from 30mm, 40mm & 50mm deep aero ... that smooths airflow over modern road and even narrow fast gravel tires, too. They make a solid upgrade ...