Tubes

Why 29" Wheels?

We are big fans of 29er MTBs, especially for fast rolling trails or those with more than their fair share of rough riding...so most trails then! In fact, we would choose them over pretty much every type of terrain.

In their earliest incarnations 29ers were a fringe product that didn't get the R&D they needed to address initial concerns over stiffness, weight, component choice and nimbleness of handling - but those days are long gone, with major manufacturers pushing the boundaries of the 29er to the forefront of MTB design.

It can be hard to sum up why they roll and gain traction better than 26" wheeled bikes, so we are grateful to Cannondale for the text below as it captures it pretty well we think...

 


Big wheels keep on rollin’.  It’s true: they do!

Because even if 29’er riders aren’t able to articulate it, they know one thing for certain: 29’ers have the laws of physics on their side. There are several reasons for this:

ROTATIONAL MOMENTUM

Die-hard 29’er aficionados are right when they say that the design inherently conserves rider energy. 29’er wheels have slightly more mass than 26-inch wheels, due to longer spokes, larger tyres and bigger rim circumference, and once those wheels are in motion, momentum from rotational mass can carry riders through tough sections that would stop a 26-inch wheeled bike. Net effect? Riders conserve energy and ride faster. While it does take slightly more energy to spool up larger wheels, once they are at speed it takes a lot more to slow them down, too. The bottom line is that many riders use smaller energy inputs to keep that 29’er rolling like a freight train. At the end of the trail, at the end of the ride, you’ll feel the difference.


ANGLE OF ATTACK

Simply put, riders on 29’ers can clear sections of trail that have given them fits in the past on little-wheel bikes. Why? The tyre’s approach angle is lessened on a 29’er for better rollover and float. The larger wheel approaches obstacles on the trail – rocks, roots, ruts, whatever – with a shallower angle. That shallow angle lets the wheel roll right over obstacles that would slow down a smaller wheel. The result is less jarring, less fatigue and less likely hood of going over the bars. Instead, riders get that characteristic ‘float’ that 29’er converts rave about.

BETTER TRACTION

A bigger contact patch with the trail means better control, better traction, and better braking. It provides sure-footed confidence in any situation. Climb like a diesel, turn like an F1, and handle everything else on the trail like a rally car.

BB PLACEMENT

When it comes to BB placement, Cannondale 29’ers are really pretty ideal. Because of the bigger wheels, the BB sits slightly higher than on a 26-inch bike, giving better stump-clearing performance. But a 29’er BB has significantly more “drop” than a 26’er, meaning that the BB sits much lower relative to the axles, providing super stable but agile handling that allows riders to maintain maximum speed with complete control and complete confidence.