Originally Posted by aem0512

So I'm good there right?

But I'm confused about the sizing of these thorn resistant tubes I want to buy. Avenir has thorn resistant tubes sized 700c / 27" x 25-35c / 1-1/4" TR. I figure these will work for me since it says 25-35c and the 1 1/8" width is about 28c. But they have another tube sized 700c / 27" x 18-25c/ 1-1/8" TR. I'm confused because I've heard it is better to go bigger rather than smaller with tubes and the 18-25c range listed in the 2nd one is smaller than 1 1/8". Which should I get? Also, the 1st has schrader valve and the 2nd has presta. I don't know if presta would be too small for the valve hole in my rims or not...