seat tube size for a 1996 Kona Kilauea?

[hamster]

If a 27.0 tube became ovalised to say 26.8 by 27.2, how could you get a 27.2 post into it?

When a raw tube the nominal is actually 27.4. A very careful builder can get this, although only probably by brazing.

So it's then typically reamed (or not ) and they then select a seat post to fit...

 

[Anthony]

The tube is a nominal 27.4 only if it's a 0.6 gauge. At that time, most Konas had 0.7 gauge seat tubes, leaving a nominal 27.2. They used a 27.0 seat post, as you obviously can't get a 27.2 post into a 27.2 tube. The high-end frames did have a 0.6 seat tube, but Kona specified the same size post for all models, presumably as it would have cost them more to have bigger posts made just for the high-end frames. The consequence though is that the 27.0 post is quite slack in some cases, and a 27.2 will then fit nicely enough. My impression is that Kona seat tubes were always reamed.

 

[Charlieboy28]

I would like it to be known that my seat tube has never been reamed,

but on the subject of konas i have just tried to insert a 27.2 and it wont go in at all whatsoever, my liberally lubed NOS 27.0 ControlTech post slides in very slowly and snugly.

I must have got a wide awake on the ball morning reamer to do my tube

 

[bazza]

My 95 Kilauea is 27.2mm if it's any help ?

Baz

 

[Anthony]

My 95 Kilauea is 27.2mm if it's any help ?
Baz

And mine won't take a 27.2 nor anywhere near!

 

[bazza]

Yours must be 26.8mm then ?

 

[MikeD]

My 1995 Kilauea is very definitely 27.0. I do wonder if some of them have been reamed to take a more readily-available size over the years.

 

[Pipmeister]

An issue that is compounding this debate (now and previously) is the fact that a seat post may not be the claimed size. Here is my digital caliper reading 26.96 on a post stamped with 27.2.