Hi guys just got my 45t Kushsprocket today. It looks well made and really well machined, no signs of machine marks I can see. The rubber type Cush material feels really solid and almost seems like its bonded to the sprocket itself. I don't have a weigh scale to be exact but it definitely weighs a good deal less than the original steel sprocket I have on, not much heavier than an aluminum type. Have yet to fit it, maybe this weekend if time permits and I will get back on how it goes.