5. Go lower when… you have too much air in your tyres, and you start to feel like you’re bouncing over the road instead of rolling over it. Overinflated tyres can also cause you to underestimate braking distances and to lose traction, especially if the road is wet. To deflate your tyre, remove the valve cap and press on the valve’s core with your fingernail. Be careful not to deflate it too much, otherwise you’ll run into the problems listed in the next section.