Originally Posted by cyccommute

The Road Morph is slightly longer and has a narrower barrel for low volume/higher pressure applications. The Mountain Morph is slightly shorter with a wide barrel for high volume/low pressure applications. The Road Morphs have an inline gauge (some of the older Mountain Morphs had this feature also). Both will work to get a high pressure touring tire to around 90 psi (both will even blow the tire off the rim ). I'd use the Road Morph for touring just because it has a gauge. If I had a mountain bike that I was touring on, I'd use the Mtn Morph because of the higher volume. The RM is kind of slow in that application.