Berk PT4-Nano

This frame is handmade by an independent "amateur" builder (Jure Berk) out of Slovenia.  This is his fourth prototype frame which utilizes carbon nano-fiber technology; hence the PT4-Nano designation.  As you can see, there is nothing amateur about his work.  He also does great work with custom integrated seatpost - saddle combos and other carbon fiber parts.

Shown here with SRAM Red and Lightweight Ventoux wheels.  More details here.