Check wether the Road or Mountain Morph fits in that bottle cage mount because what does suck with the Morphs is the mount. It's flimsy. Mine broke and now place it in a bottle cage mount that's much better. Unless you plan on getting flats many times a day, I don't think the difference in volume between the two Morphs would be a concern. I have a Road Morph and pumping air into an empty tube is so easy I do it while singing a song to the rythm and I'm sad when it's over.