Cervélo called my favorite gravel tires slow! Comparative aero data

While wind-tunnel testing for the new Aspero 5 gravel bike, Cervélo tested a wide range of tire shapes and sizes before setting on a full slick 42mm Vittoria Corsa Pro Control as the spec’ed tire. The shape of my favorite tire, the Schwalbe G-One RS, proved to be quite slow, aerodynamically. Does it matter? Cervélo shared the data on all the tires the company tested, and I show those results by tire type and width at 30mph (how they tested) and 20mph (a realistic speed). Save on tires and any other cycling gear at BikeTiresDirect, a loyal supporter of The Ride. Use the code RIDEWITHBEN for 10% off at any time of the year. Check out the deals at BikeTiresDirect: https://tinyurl.com/yc7vxujh Ingmar Yungnickel's new Airo app: https://www.airo.app/ -- Want to see what I'm testing and where? Follow me on Strava: https://www.strava.com/athletes/ben-delaney on Instagram: https://www.instagram.com/ben_delaney -- The Ride is supported in 2025 by: BikeTiresDirect: https://tinyurl.com/yc7vxujh (save 10% with code 'THERIDE') Castelli clothing: https://www.castelli-cycling.com/US/en/ Feedback Sports stands & tools: https://bit.ly/3S9Dq8r HOVERAir self-flying cameras: https://hoverair.sjv.io/EEmbM9 Perc coffee: https://tinyurl.com/fjr7nurr (save 15% with code 'ride15') Saris racks: https://saris.com/collections/racks# (save 15% with code 'ben15') Shimano shoes & glasses: http://tinyurl.com/ye274tep Silca maintenance: https://silca.cc/ (save 10% with code 'theridewithbenjune2025') The Cyclist Lawyer: https://www.thecyclist-lawyer.com/