Tubes for Schwalbe Marathons
My Catrike Trail has Schwalbe Marathons (20x1.5) and I am constantly getting flats. Not while riding, but I'll go out to the garage and a fresh tube will be flat.
I am inflating to the specified pressure (even less sometimes because I thought that was the issue) and am still having issues. I ride on clean surfaces and I have found no punctures in the tires. I'm wondering if the tubes I'm using are too big. I've tried 4-5 different brands, the most recent being Sunlite and Specialized.
I've probably gone through 10-15 tubes in the last year, and that's with minimal riding (I've been out of town at school). What are other people using with these tires?