Hello everyone, Absolutely crazy about old-school BMX, a friend and I have launched a small production run of HUTCH tribute seat post clamps to fit our Old school bike frames. Due to the lack of flex of titanium (vs aluminum), these donuts are 1,011 inches (25,7 mm) to fit painted frames. Donut and screw weigh 81 gr and are made of grade 5 titanium alloy. Feel free to ask me any questions. Enjoy the ride!