So I have a flat tire luckily it was a slow leak or happened just as I rode into my driveway... However the tube in my tire is a bontragger 700x18c-23c I am gonna order a few on amazon, this one, is this any good? http://www.amazon.com/Michelin-Airstop-18-23mm-PRESTA-threaded/dp/B001B00ISC/ref=sr_1_1?s=sporting-goods&ie=UTF8&qid=1336875575&sr=1-1 Thanks guys!!