But what if a turn tightens in on itself? Lots of freeway offramps and plenty of mountain roads do so; this turn is a decreasing radius, and it’s what you really need to watch out for. You’ll need to lean more and more if you get into one of these too fast, and that can push you to the edge of the road or over the centerline. With a decreasing-radius turn, you will have to enter more slowly than normal, lean more, or ride a slightly wider line and apply throttle only when the remaining corner is fully seen. On unfamiliar roads, assume every turn is a decreasing radius.