La bici de descenso más liviana del mundo??

Buceando en Ridemonkey, encontré este thread sobre una Trek Session de 13.5 Kg. Hasta tiene video y todo:
http://www.youtube.com/watch?v=lKXgA3yA4e4&feature=player_embedded
Acá está el bike check:
Frame: Trek Session 88 size M
Rear shock: Fox RC4 with Diverse ti-spring
Fork: RS Boxxer WC
Headset: CaneCreek
Spacers: PointOneRacing
Topcap: Carbon with alu bolt
Stem: PointOneRacing LTD
Handlebar: Truvativ Holzfeller WC polished
Grips: Bontrager XXX Lite with plastic plugs
Brakes: Avid Elixir CR Mag with ti hardware etc
Discs: Formula R1 SL 180mm with ti bolts
Shifter: Customized Shimano XTR with alu bolts
Derailleur: Customized Shimano XTR
Housing/Cable: Yumeya/Powercordz
Chain: KMC X10SL
Cassette: 7speed DuraAce 11-21 with alu lock-ring
Chainring: E13 Guidering
Crankset: Customized Shimano XTR
Pedals: Superstar Ultra MAG
Chainguide: Customized LG1+
Seatclamp: Hope
Seat/Post: Stripped I-Fly/Carbon micro post with ti hardware
Hubs: Tune King/Kong MK
Spokes: DT Swiss Aero Lite with alu nipples
Rims: NoTubes Flow
Tires: Maxxis Swampthing UST 2,5