William Blackwrote a review of Schwalbe Pro One Tire - Tubeless on June 6, 2019
Familiarity: I returned this product before using it
Mounted very easily, maybe the easiest road tire I have ever mounted. They measure 27.8 mm at 100 psi on DT Swiss DB24 rims. FWIW, 25 mm Maxxis Padrones mount on these wheels at 25.5 mm. This left me with only 2.5 mm clearance on a BMC Granfondo GF01, which is too close for comfort, especially on those flexible aluminum wheels. I will need to return and order the 23 mm version. All this said, had I read reviews more closely I would have ordered the 23 mm version from the beginning and have given this product 5 stars based on mounting alone.