Complex sentence: Motorcycle tire rim locks clamp both beads at once because the tire is narrow enough do this conveniently with one device, and also there is no such thing as an "inside bead" and "outside bead" on a motorcycle tire.
Split into simpler sentences: Motorcycle tire rim locks clamp both beads at once because the tire is narrow enough do this conveniently with one device. Additionally, there is no such thing as an "inside bead" and "outside bead" on a motorcycle tire.