Review on DMLNN Road Bike Replacement Inner Tubes - 28 700x18-25C, Presta Valve (48mm/60mm/80mm), for 700c x 18, 23, 25 Tires - Includes 6 Tubes and 2 Tire Levers by Cre Soto

These tubes are rubbish. Saving money doesn't matter if they can't hold their breath. Took two on a bike ride last weekend. The first one failed before I put the wheel back on (no it wasn't too flat, I've done it before). The second failed after about 10 miles - exploded when I was going uphill. I only carry two tubes with me so my wife had to buy two real tubes and bring them to me which also ruined her day. Seriously for those tubes!