Good morning all. I unfortunately ran over a bed of nails last weekend on my 961 Sport. (Just kidding, but I do have four nails in my flat rear tire.) I purchased a new Dunlop Q3, but because I have the spoke rims I need a tube. No tube is an exact match. In fact, when I speak to any of the internet shops, and I tell them I need tubes for this tire, the first question out of there mouth is, "What kind of bike are your riding?" Has anyone had to purchase a new tube? What is a good fit? Thanks.