Continental Bicycle Tubes Race 28 700x20-25 S42 Presta Valve 42mm Bike Tube Super Value Bundle - Pack of 5 Conti Tubes & 2 Conti Tire Levers for Optimal Performance Review

Bought a while ago because of a good offer. It took me forever to get hold of them because I had other spare tubes. All this in 3 days! 1st, flat next morning. 2nd, flat next morning. Other pumped up and placed in my bathtub, I see small bubbles. One of three: 1. Believe the reviews that the quality is going down. 2. Chinese fakes or 3. People abuse the return policy and send their pierced pipes back. I happen to think it's partly 1, mostly 3. I don't know. Revain is in dire need of an overhaul

When I first started racing, I didn't like it. Every ride was a struggle. I've been cutting tires and grinding rims like it's nobody's business. I almost gave up the hobby. Then one day after punctured his second tire of the day trying to climb a steep hill, another rider recommended Intertubes. This product is life changing. My rim no longer cuts through a tire or wears out with sand from a concrete road. Riding uphill with a ventilated intermediate chamber to avoid tire and rim slippage. It's

Seems to be working great. I put it up in the fall, I rode the simulator all winter. Spring is here, still in force. Update: I had a rash from flats. 1 dirt puncture: not the hose's fault. 1 Pinch: Maybe it's because of the tube that it's too weak. 1 puncture near the nozzle where the hose connects to the nozzle guard. Others have noticed this too. Seems to be poor quality control. I have found that when I inflate some tubes on the outside of the tire, they start to bulge at this junction, even

I haven't used Continental tubes for a long time and now I know why. The tubes are of poor quality. During installation, the valve inserts were unscrewed several times when the pump was removed. I think it's good that it comes in a pack of 5 because you can only use 1 or 2 that can hold air. I had 3 popups in a row after the installation was complete. I lowered the recommended pressure and used 80psi instead of the nominal 100-120psi. I thoroughly cleaned the rim and inspected for sharp edges…

I don't know if these are cheap Chinese fakes, or if they're just pipes that didn't pass Conti QC, or if they've been in storage somewhere for the last ten years, but these pipes are complete rubbish. If you inflate them without installing them, you'll see bulges and bumps where tube wall thickness varies greatly. If you install them, you will find, like me, that you need to use 4 tubes to go 6 miles. That's right, it took me 2 hours to get 6 miles today because every tube I put in my Conti…

I HATE these tubes! In fact, I think it would be more accurate to say I hate these valves. First, they stick like crazy, making it almost impossible to get the air to move. I attach a floor pump, push it down and the pressure jumps to 140psi. Of course, this is not tire pressure, but pump pressure, since no air gets into the tires. I removed the pump, tried again - same thing. The only way to inflate these things with air is to squeeze the valve 3-4 times to release them to allow air to enter…