[ptgarcia]

To be sure you need to check the weights of your existing wheel/tire combo and the wheel/tire combo you're looking to purchase. Overall weight is one consideration, the other is how that weight is distributed. Larger wheel/tire combos have more mass farther away from the axis of rotation, which equates to more inertia. This makes it harder to get them turning, and once turning harder to get them to stop. If you go with a 20"+ combo you will lose braking power. Is it enough to concern you? I don't know, only you can make that determination.