Does a Monk's Belt add to Unarmored Speed?

Question

I have seen several 1,2 places that state's the Monk's Belt increases Monk's Unarmored Speed Bonus.

A Monk's Belt is:

This simple rope belt, when wrapped around a character’s waist, confers great ability in unarmed combat. The wearer’s AC and unarmed damage is treated as a monk of five levels higher. If donned by a character with the Stunning Fist feat, the belt lets her make one additional stunning attack per day. If the character is not a monk, she gains the AC and unarmed damage of a 5th-level monk. This AC bonus functions just like the monk’s AC bonus.

Does any one know why people are saying it increases speed bonus?

Answer 1

Because people on the Internet are frequently wrong.

As you note, the Monk's Belt says specifically what it changes, and speed isn't one of them, though if someone wanted to house-rule that it did it wouldn't exactly break the game.

Answer 2

It's a common misconception

The Monk's Belt does not add to Unarmored Speed, but a lot of people think it does during online discussions because of a common shorthand when talking about the Belt; specifically, people say it 'lets you buy five levels in Monk'. Because the Monk's Belt enhances so many other features of the Monk that most players/builds care about, it's easy to discuss it in that fashion - but it does lead to misconceptions.