The Schwalbe One family provides the perfect tire for the latest gravel bike trend. The smooth rolling G-One profile and Tubeless Easy technology make it a pleasure to ride over forest paths and rolling fields.
We have installed and ridden the 38mm and found it inflates to 40.6mm with the Stan's Grail rim.
If your frame has enough space, select the 40mm version. Larger volume is always an advantage when riding off-road.