I ride 7miles to work each way, every day, rain or shine, on paved shoulders full of debris and on grass, after sunset and before dawn: These Continental tubes with Michelin tires endure best, from my experience. Great customer service helps a lot to get ready. Thanks!
Continental tires are the top of the line. The Shrader valve is valuable to me because it has a restraining nut that prevents damage when you inflate the tire.
Excellent tubes. Love the new style schrader valves that have the presta style rim nut. Will buy these again.