Advantages:

Ø Bigger wheels have a more angular momentum, which is more mass at the bigger radius, therefore faster spinning.

Ø Basically superior gyroscopic stability and handling at high speeds.

Ø Great angle of attack for the tread in driving and braking – more like a conveyor belt, less like a scoop.

Ø Bigger wheels means bigger tires and therefore, longer contact patch which decreases psi (rolling resistance). They have twice the tire footprint on the ground for more traction.

Ø A bigger gear on the high end, and the low end is just the tiniest bit harder.

Ø More fun to ride, feels better.

Ø Bigger wheels go over logs, bumps and divots easier.

Disadvantages:

Ø Bigger wheels are heavier.

Ø They accelerates more slowly.

Ø Steering response is not as nimble as a 26-inch wheel.

Ø Bigger Wheels are less stiff and strong laterally.

Ø Less component choices to match the bigger wheels: rims, tires, frames etc

Ok, what do you think? Will we see more of these 29" wheel mountain bikes in the future, or is it just a fad? Have you tried riding a 29" wheel bike?