Confezione da 2 Tubi Interni 20x4 Fat Tire Bike con Valvola Schrader, 20 x 4.0 Premium B...
We designed the tube width specially for 20x4.0 Ebike. Others tube width fit for 20x3.5 - 4.0 bike. It is easily popped to use the tube with not enough width. The width of our inner tubes is more suitable and durable.