Drilling or not a Kona frame? A sacrilege?

[James]

I love learning about steel kona (and other) properties and differences from Anthony, I feel that there is so much choice and decision to do with tubing choice etc and so much to know. Before I joined this forum I had no idea of this, other than I had heard of Reynolds and knew there were differences between steel and alu (which i now know a bit about types and grades aswell).

One question though, you say that cindercones and lavadomes have different properties to firemountains and i would imagine hahana's. But what are these differences?

 

[dookie]

i have a king kahuna calling for a 27.0, but had a beautiful boutique ti post (by torque titanium fabrication) in 26.8 from another bike that i simply had to use.

a trip to the local hobby shop produced a thin sheet of brass in precisely 0.1mm thickness...carefully cut to a single wrap around the post makes for a 27.0 diameter with built-in anti-seize properties. a bit of grease helps the very flexible sheet stick nicely to the shaft...surprisingly easy to get in and out of the frame without it moving around.

two years and counting without issue.

 

[therapy]

But all the tests I've seen for size 18 Cones/Domes say 4.8, and Kona themselves claimed 4.75, so I find that 4.41 quite surprising.

It surprised me too, but without cutting the tubes in half, you never can say whats under the paintwork - maybe its half rusty, so its lighter than it should be

I love learning about steel kona (and other) properties and differences from Anthony

+1. Thanks again Anthony.

One question though, you say that cindercones and lavadomes have different properties to firemountains and i would imagine hahana's. But what are these differences?

First noticeable one, was AFAIK that Fire Mountains and Hahanna's weren't double butted, just plain gauge Cr-Mo.

 

[guybe]

It's only a kona, drill away.

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