For 20" wheels with an ISO diameter of 451. Found on more speed-oriented bikes like Tern's 451 line and BF Pocket Rockets.
Schwalbe Durano - 20x1-1/8(28-451) The popular Durano has outstanding qualities: Extremely high mileage. Dual Compound for best grip - even training on wet winter roads. Proven RaceGuard protection belt.
*These tires are not to be confused with 20" 406 tires found on the majority of folding bikes.