What diaper is the best for bike riding? After 3 rides this last week I need a new combo diaper system that does not breakup when soaked. The Tranquility Slim loads up too much when wet. I tried a Pamper 7 Cruiser insert and that was just OK. The bike trails are busy now so it should not appear you are wearing a diaper under spandex shorts. I do wear a pair of plastic pants over the disposable diaper. I have heard many bike racers never stop to pee and just let go.