Ruben Alcantara signature diameter: 20 inch width: 2.25 inch max. tire pressure: 110 psi (7.6 bar) style: steel bead There’s not much to be said that hasn’t already about the classic Ruben tire. The original fat, now legendary tire, with a medium depth and perfect tread pattern, micro knurling that’s as happy in the dirt as it is on cement, this really is the perfect tire for every occasion. Rubens Rampera tire comes standard with a puncture resistant layer and up to 110 PSI capabilities.