phoenixinflames":dxngp8ns said:It`s 27.0.
27.2 should fit, too if you use enogh grease, dont plan to change seat height that often or dont mind a scratched post.
Shimming is indeed not ideal but could work for 25.4 posts if you use a long shim.
A too short shim could end up in a snapping weld at the seat tube-top tube junction as the seat tube will lack the support given by a post with the right diameter.
Anthony":1pomfotu said:Kona say 27.0, but they say that also for the 97 Kilauea, which I believe has the same seat tube and I find a 27.0 is too small for the Kilauea and a 27.2 is perfect. If you- find that a 27.0 falls down the tube under gravity, as mine will, then it's too small.
As the tube comes out of the mill, it has a constant width all the way down to the butted length at the bottom. However it still requires reaming, and depending on how rough the inside of the tube is, it may require a lot or a little. And depending on how far down the tube the operator reams, the aperture might get widened a long way down or not such a long way down. So there are variations, and another 97 Kilauea may not take the 27.2 post that mine does.phoenixinflames":3798y4ly said:I experienced that with a lot of Kona frames. The seat tubes seem to get narrower to the bottom. As long as you dont insert the post that much, 27.2 is fine.Anthony":3798y4ly said:Kona say 27.0, but they say that also for the 97 Kilauea, which I believe has the same seat tube and I find a 27.0 is too small for the Kilauea and a 27.2 is perfect. If you- find that a 27.0 falls down the tube under gravity, as mine will, then it's too small.
If you want to insert a 425mm post let`s say half of its length from time to time, 27.0 is the size to go.