Amazon.com : 2 Pack 20" Bike Tubes 20x1.75/1.90/1.95/2.125 AV32mm Valve 20" Bicycle Tubes Compatible with 20x1.75 20 x 1.90 20 x 1.95 20x2.0 20 x 2.10 20 x 2.125 Most Bike Tire Tubes : Sports & Outdoors
CST binnenband 22 x 1.75 inch (47-457) HV 48 mm
AMIGO binnenband 18 x 1.75 (47-355) AV 48 mm - Internet-Bikes