TSB-HEM1301 titanium carbon mtb frame aerospace grade 3AL/2.5V ... 3AL-2.5V)/carbonSpecification normal tube, special ti-carbon top tube and down tube, Engraving patterns; V ... -brake and Disc brake.Wheel Size26"Frame Size13"~21" /Customer requiredWeight1.2-1.5kgWeldingManual argon ... of all the metals, including aluminum, steel and carbon fiber, TSB chose titanium. We love titanium because ...