I know some bikes like the Pinarello Dogma have internal ribs and others use "carbon nano tubes." I thought Colnago EPS/EPQ/c59 tubes were ribbed as well. My Look 595 has compressed or "forged" dropouts and bottom bracket, as well as "nano tubes."

CNTT - Carbon Nano Tube Tech
- The ultimate evolution of nano-technology.
- Carbon nano tubes exhibit extraordinary strength. When combined with epoxy resin and nano-powder (the base of nanotechnology) provide an increase of fracture resistance by 49% when compared to standard resin and 20% greater than carbon nano tech.

CNT - Carbon Nano Tech
- Nano scaled particles are added to the resin during the manufacturing process.
- Reduces microscopic gaps between resin and the fibers; creating a shear strength increase of 27% over standard resin construction.