Today someone said that Bikes could assault 12". I've always just assaulted 6" because it isn't specified in the Bikes section that they can assault 12", but then my friend pointed out that on page 34, in the first sentence under the Moving Assaulting Models heading, it reads that models make their assault move following the same rules as in the Movement phase. Does this include rules outlined for specific unit types?
I notice that Jump Infantry and Beasts and Cavalry both specify the distance they can assault, but Bikes do not. So can they assault 12"? Have I been missing out on this for as long as I have been using Bikes?