I thought i'd ask in here because I'm not convinced of what I heard.
A local bike fitter (Specialized dealer) informed me that a mountain bike geometry promotes leaning forward more than a road bike, which is one of the reasons why mountain biking is harder on the lower back.
?? Well, this is the first I've heard of this.
Regardless of the back pain comment, has anyone heard this leaning geometry comment before? Or something to that effect?