Are you looking for a 20'' (ISO 406) bicycle tyres? You want it fast, light and durable? I will review the psi, weight and other info of some popular wheels.
Kojak - 1.35 inches, 95psi, 285grams, RaceGuard protection
Kojak (foldable) - 1.35 inches, 95psi, 215grams, RaceGuard protection
Durano - 1.10 inches, 120psi, 230grams, RaceGuard protection
Durano (foldable) - 1.10 inches, 120psi, 190grams, RaceGuard protection
Marathon Plus - 1.35 inches, 95psi, 580grams, Strongest flat protection
Marathon Racer - 1.5 inches 85psi, 340grams, RaceGuard protection
Marathon Racer (foldable) - 1.5 inches, 85psi, 295grams, RaceGuard protection
Marathon Supreme (foldable) - 1.6 inches, 85psi, 325grams, HD Ceramic guard
Big Apple - 2 inches, 70psi, 530grams, KevlarGuard