2023 RADON SPIRE DISC 9.0 ROAD BIKESPIRE DISC 9.0 - our best seller and top all-rounder with aggressive and timeless look goes into the third season and for good reason! The SPIRE DISC 9.0 is equipped with the high-quality Shimano ULTEGRA drivetrain. From head to toe, from shifter to cassette - precise and faithful gear changes are guaranteed with ..