For 1 1/8" steerer, 1 1/4 oversize downtube, 1 1/8 oversize top tube, standard 1 1/8 seat tube.

Upper head lug says 79, so I believe this is meant for a 73 head tube angle with a 6 degree sloping top tube.

Perfect for a gravel bike build to give extra standover and dropper post clearance and raising the bars and increasing standover. Very hard to find now.

I have several sets of these.