yes they will work. BMXs usually come with a U brake, they have two styles of pad fitting, tradtitional vee style, or post clamp. You should really use specific pads for the post clamp virsion, but a vee pad works anyway, it can mess the thread up though so you might not be able to use in on a vee after. Always worth researching though, look at your brake and then search for it on google and see what type it is. The only other point is, those maggie to vee pad adaptors take up a lot of room, if you are having trouble with space with traditional pads, then I reccomend some heatsink backings with either heatsink or joypads as the braking material.