Testing Gravaa
To test Gravaa, we naturally chose the cobbles. Our setup included a Cervélo Aspero 5 equipped with Gravaa x Reserve 42I49 wheels, Challenge Grifo Pro 29×1.30” (33-622) tires, a Favero Assioma DUO Power Meter (both pedals) and a Garmin Edge 830.
The plan was to ride over three distinct sections of terrain: rough cobblestones (500m), smooth tarmac (1400m), and sand (1000m). Our 75kg test cyclist completed each section in both directions over multiple days in mild weather (no rain, wind <2Bft).
During the tests, we measured elapsed time, distance, speed, power, and tire pressure on both the front and rear tires. In all cases, we kept a constant offset of 0.2 bar between the rear and front tires – for example, 3.5 bar at the front corresponded to 3.7 bar at the rear.