Continental makes great products and this road race tube is no different. These tubes are consistently very high quality and reliable... no muss, no fuss! Easy to mount and last a long time... I highly recommend them. I supposed you could get a cheaper or lighter tube, but its not worth the peace of mind. You won't be disappointed...
After trying several different brands of tubes, I now just buy Continental Race Road tubes. They seem to hold air from day to day better than some other brands and I don't have to constantly reattach the head of my air pump to get them to accept air. They also can be rolled up into a small space ( I put talc on them and put them in a baggie in my saddle bag for emergency use) without twisting up like some other brands. While racers might prefer a different brand or a different model from Continental, these work fine for me.
The Continental Road Race tubes are a high quality product for road cycling both training and racing. I use them with my Continental Grand Prix 4000 S II tires. One of the best things about the tubes is that they come in a variety of stem lengths. I have two sets of deep rim carbon fiber wheels on my road bikes and being able to get the longer stem is a key feature of this product. The tubes are long lasting and are great when paired with almost any wheel tire combination you have. Highly recommended.
I bought a couple of these tubes to use in an old school single walled 27 wheel. I liked the stem size. At 42mm instead of 48mm (too long) or 32mm (too short), these were the goldilocks size, just right.
But what impressed me most is that they held air pressure better than most any other light weight tube I've used. So I tried them in my 26er and had the same results. Before I knew it was was switching my 700C wheels as well.
I know many will say a tube is a tube and only as good as the tire that surrounds it. But for me, the light weight, perfect stem size and proven less air lose makes this my choice for tubes going forward.
I've come to expect quality in Continental products, having run my Bianchi road bike with GP 4000s tires for many years now. This is the first time I've gone with Conti tubes as well, and I'm glad I did. A cycling tour in New Zealand exposed us to some rough roads and more than our share of gravel. Punctures were the order of the day. The Conti tubes held up. Yes, we had one flat, but their frequency was way down for our group of 10, part of a larger group of 110 riders.