18 inch tyres from Schwalbe
The Marathon Racer is the fastest Schwalbe Marathon tyre ever, optimised for speed. 18 x 1.5 inches / ETRTO size: 40-355
Schwalbe Black Jack 18 x 1.9 inch / ISO/ETRTO 47-355 kids mountain bike tyre
Schwalbe Big Apple 50-355 / 16 x 2 inch tyre