If the price is not such an object then maybe you could consult with a custom specialist like Zinn or someone who makes CF bikes from tubes like Calfee. There are not many production bikes this big. KHS makes one. It's steel and also has extra long cranks and other heavy duty features. It has a high head tube.
On the MTB side, Ventana makes extra large custom frames.
https://khsbicycles.com/bikes/2014-k.../flite-747-14/
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Genesis 49:16-17
Last edited by Darth Lefty; 08-19-19 at 10:51 AM.