This is the same tube as the standard Race Road tube, except with a longer 60mm valve for aero and semi-aero rims. The Race road tube is a high-quality and reliable tube at a good price. Continental has a good eye on quality control. We never see blems or seconds. The valve construction is stout and durable. It features a removable core which can be replaced if damaged or substituted with a longer-than-60mm valve for deep aero rims. The removable core also allows for the addition of sealant like Stan's NoTubes tire sealant.
I have used these tubes for years and I have nothing but praise for them. The removable valve cores are a nice feature - If you race cross and you lack tubulars or tubeless tires, you can take out the valve core and put Stans sealant in these tubes. Its not a perfect solution, but it works better than Slime tubes insofar as it at least provides SOME thorn protection.
Ive used the regular and lightweight Continental tubes almost exclusively for 10 years (8,000+ miles/year) and have never had a defective one.
Recently changed out my old tubes with these continental tubes for a race. My rear tube blew halfway through the first lap right at the seam. (so it wasnt foreign matter) The tire pressure was will in-between the recommended pressure. Defective tube?