Replacements for worn, differently patterned or constructed tires will not react the same. When new tires are fitted, they should not be subjected to maximum power, abrupt lean-over or hard cornering until a reasonable run-in distance of approximately 100 miles has been covered. This will permit the rider to become accustomed to the feel of the new tires or tire combination, find the edge, and achieve optimum road grip for a range of speeds, acceleration and handling use. Check and adjust inflation pressure to recommended levels after tire cools for at least three (3) hours following run-in. Remember, new tires will have a very different contact patch and lean-over edge. New tires, mixing a new tire with a worn older tire, and mixing different pattern combinations require careful ride evaluation.