With an internal rim width of 18mm (22.5mm externally), the EA90s offer a solid, wide stance for tyres of 25mm or wider. Perhaps more importantly, the rims seem to strike that nice balance of easy installation and a solid, confident, tubeless seal. We tested Schwalbe One 25mm tyres at everywhere from 70 to 110psi, and Hutchinson Piranha 2 cyclocross tubeless tyres as low as 25psi without any burps or other issues.