The mtb version only works out better if your large bore tires are pumped up to lower pressures, otherwise you are going to have to bear heavier loads, though you will fill faster. I got the road version for my 700c 35s that I at times take to 80 or even 90 psi. But according to Heine I shouldn't be not only for comfort, but efficiency. I forget, but I think he mensions some pretty soft levels like 40. I don't like anything lower than 65, but I am reconsidering. So the decision whether to go road or MTB should possibily be based on your peak pressure, not what size wheels you have. I run the same size tires on both wheel sizes, but of course one might not. Either way if you ever pump to high pressures the road is probably better.

I love the look of the Lezine pumps, but for some odd reason, when I was buying the reviews at the time were not encouraging.