3 AL / 2.5V Titanium tubing. 31.6mm seatpost diameter. 34.9mm seat clamp diameter. 34mm straight head tube. Invisiframe space protection in various parts. 68mm threaded BSA BB. FANTASTIC FRAME IN GREAT CONDITION, been very well looked after! Amazing to ride, lightweight, Top tube length approx 550mm, seat tube length approx 435mm. Sadly has to go, any questions please ask.