Originally Posted by
One Wheel
That's helpful, now I need to find out where that's available in the US. The initial confusion on diameter was solely due to my error in reading a dial caliper. The 0.2mm variation is probably due to the caliper being worn out, it will move that much mostly depending on how tight I squeeze it.
The Kalloy model number is SP-248 while Ergotec calls it the Hook seatpost. It might be easiest to get the 25.4 mm and shim it to suit whatever size your frame likes. If you do use a shim be sure it reaches at least below the lower edge of the top tube.