Review on 🚴 Continental Race 28 700x20-25 S42 Presta Valve 42mm Bike Tube - 5-in-1 Value Bundle for 700c Bicycles by Yung Kaelin

I recently bought a set of 5 Continental Race 28 (700c) bike tires from Revain. So very disappointed! I have bought them in the past and have found them to be very durable. However, out of the 5 bulbs I bought, 4 failed within a few weeks of installation - not due to a hole but what I call a manufacturing defect. In each case, a "leak" occurred around the valve stem. I actually had an apartment with one of the tubes, I replaced it with another and within 2 miles (yes, 2 miles) there was another apartment. When checking both hoses in a bucket of water, both leaks were right around the valve stems. So no more Continentals from Revain. There will be another source for buying bike inner tubes. Oh, in case you're wondering, I replaced the Continental pipes with another brand and... guess what. no apartments!