i have had a flat one time. we were way out of town on a highway with a nice big shoulder. it was my first day on my brand new bike. and of course we didn't have a pump!! my husband took off to get the car and i just began walking to get as far as i could. a few minutes after he left there was a cyclist on the other side of the road. i wasn't going to yell across the highway to him but i couldn't help but think "he probably has a pump". a few minutes later i hear "ding, ding" behind me. he had come around and offered help. i had a tube and tools...just no pump. so he helped me change it and by the time i got a few pedal strokes down the road my husband showed up!! i made sure i got a pump after that! the last time we went riding my husband got a flat and i got to change it for him!!!