These are $99 each 1 red 1 orange. 1 1/4" or 31mm approx. I measured them with a spoke ruler. This is the one that fit the cool aluminum frames from the late 90s like Mcmahon, ProConcept, TNT you get the idea. There's way more of the 1" ones and 1 1/8" ones out there You hardly ever see this size. I have both of them sitting loosely on a ProConcept frame to show that it indeed is the size I say it is.