I brought 2 bikes here for a tune up and both of them have had multiple flats - NOT thorns. My tires went immediately flat every other ride. The staff were RUDE to me, and treated me like an idiot ( 4 seperate people)- and acted superior and very put off by my presence in their store. I almost quit cycling because I felt so bad. Luckily I went to a different, nearby store and was treated much better. Not only did they fix my tire problem, but I am enjoying cycling again.