NOPE! Of course it helps, but we are an education center and we are devoted to helping you learn from square-one. You can come if you are a seasoned bike mechanic or if you have never changed a tube. Keep in mind that when we are very busy you might have to wait for a mechanic to finish helping one person before they get to you. You will be helped in the order that you arrived. If you do not need to work on your bike you can just come and shadow a mechanic and absorb skills.