1. S&M Shield
I think this might be the winner for most iconic BMX logo. At least, I can't think of a logo I've seen more people wear as a t-shirt or buy as a sticker. Its one thing to have a logo you promote the hell out of and pay your riders to wear, its another when pros who don't even ride for your company are wearing your t-shirts on their off time and stoked to stick your stickers. I can't think of a brand/logo or style that better represents BMX as a whole. A little bit rough on the edges, but still a badge of powerful imagery of do-it-yourself, make-it-happen-your-way style that's stood the test of time.