Talk:Gnar/@comment-2231554-20140731205242/@comment-1330314-20140731214558

There are technically two ways you can increase your movement speed, which is through either flat bonuses (base MS, boots, other flat movespeed bonuses) or multiplicative increases (any % MS boost). Any kind of flat movement speed, including bonuses from abilities, is functionally the same as additional base MS or MS from boots.

The way movement speed is calculated in-game is by adding up every single instance of flat MS on your champion and then multiplying it by the sum of % movespeed bonuses. There are other quirks (there's a series of caps past a certain MS value that limits the effectiveness of movement speed bonuses, and some effects like have a % MS bonus that multiplies other % MS bonuses instead of adding up with them), but this is how your movement speed is going to work in nearly every case.