Originally Posted by
niliraga
wasnt this the seatpost bolt arrangement preferred by Miyata? I have kluged around this problem before, using a "tall" allen-headed nut from MTB brake pads to match the bolt. It worked, but I needed to use two allen wrenches to adjust the post -- your solution here is far 'correcter'
I have an 85 912 and a 90/91 Team. Both use a hexagon nut.