Trifox X8 adopts carbon fiber integrated molding process, three-dimensional guide type integrated aero pipe type, internal routing aerodynamic propel design, full sense of strength, the combination of sports and equipment aesthetics, and the special processing method of carbon fiber makes the frame without Joint gaps, with consistent visual aesthetics that other frame materials don't have. The internal routing design, the wiring from the upper tube of the frame head, is simple and beautiful. The carbon fiber raw materials is derived from Toray T800 high-quality. The carbon fiber is flexible on the outside and rigid on the inside. It is lighter than aluminum alloy, but more strength than steel. It has the characteristics of corrosion resistance, shock resistance and high modulus. It is important materials and always used in national defense, military and civilian applications. It not only has the inherent characteristics of carbon materials, but also has the soft processability of textile fibers. It is a new generation of reinforcing fibers which has many excellent properties. Ultra-light carbon fiber front fork: aerodynamic design of breaking wind, taking into account lightness and strength, riding faster and more comfortable. Carbon fiber windbreaking aero seatpost: The lay-back drop-shaped tube design, with a smaller windward surface, effectively reduces the wind resistance of cycling, and makes riding more enjoyable. Hidden seatpost clamp, beautiful and fashionable. Bike frame size road have 4 choose: 48 / 51 / 54 / 56 cm, how to measure the size of a bike frame, you can bike frame sizes for height and inseam. 2-year warranty service. Product Geometry ROAD BIKE FRAME SIZES 48cm 51cm 54cm 56cm A(mm) Top tube length horizontal 519 535 550 565 B(mm) BB Drop 68 68 68 68 C(mm) Chainstay length 415 415 415 415 D() Seat tube angle 73 73 73 73 E() Head tube angle 70.5 72.2 73.1 73.5 F(mm) Front Center 578 580 587 598 G(mm) Head tube length 94 112 130 152 H(mm) Fork offset 43 43 43 43 I(mm) Reach 368 377 385 394 J(mm) Stack 495 518 538 560 K(mm) BB center to the top of seat tube 429 454 474 498 Internal wiring diagram Product Details Product Weight Frame Weight 51cm 1172g 20g Components Weight Fork 420g 2g Seatpost 234g 2g Front Thru-Axle Skewer 34g Rear Thru-Axle Skewer MSRP:$969