2017 FCFB BACK 20MM GRAY carbon seatpost 3k Weave bicycle seat tube 27.2/30.8/31.6*350/400mm bike cycling parts | Спорт и

FCFB  glossy +matt  back 20mm  3K carbon  seatpost   size 27.2/30.8/31.6 *350/400mm   Made of carbon fiber, ultralight with a better look and no compromises of   stiffness.   Two bolt design for easy adjustment while holding rails securely.   Aluminum alloy clamp is durable and rust-proof, fixing the saddle firmly.   Gives a powerful upright support for saddle with excellent shock absorption   quality. Easy installation without be bulky, making cycling more comfortabl   Perfect production process, the wall thickness 2MM   Upper and lower clamp seat tube   Applicable to any seat cushion bow (6 * 6mm, 7 * 7mm, 7 * 9mm, 8 * 12mm)   （6 * 6mm，7 * 7mm，7 * 9mm，8 * 12mm）   Passed EN EN14766 Standards and the JAPAN JIS Standards.   defualt glossy  if you need matt please leave order message tell us    this link only same my picture color ,no have other color    Carbon fiber (CF) is a new kind of fiber material with high strength and high modulus fiber with carbon content above 95%. It is made of flaky graphite microcrystal and other organic fibers along the axial direction of the fiber pile, the carbonation and graphitization of the microcrystalline graphite material. Carbon fiber "outside the soft inside just", the quality of aluminum than the light, but the strength is higher than iron and steel, and has a corrosion-resistant, high modulus of the characteristics of the military and civilian aspects of national defense are important materials. It not only has the inherent intrinsic properties of carbon materials, but also both the softness of textile fibers can be processed, is a new generation of reinforcing fibers. Carbon fiber is a carbon material with strong tensile strength and fiber softness and machinability. Carbon fiber is a kind of new material with excellent mechanical properties. The carbon fiber has a tensile strength of about 2 to 7 GPa and a tensile modulus of about 200 to 700 GPa. Density of about 1.5 to 2.0 grams per cubic centimeter, which in addition to the original wire structure, mainly determined by the carbonization temperature. Generally after high temperature graphitization of 3000 ℃, the density of up to 2.0 g per cubic centimeter. Coupled with its light weight, its weight is even lighter than aluminum, less than 1/4 of steel, iron is 20 times stronger than the strength. Carbon fiber thermal expansion coefficient and other fibers, it has the characteristics of anisotropy. The specific heat capacity of carbon fiber is generally 7.12. The thermal conductivity decreases with increasing temperature and is negative (0.72 to 0.90) parallel to the fiber direction and positive (32 to 22) normal to the fiber direction. The specific resistance of the carbon fiber depends on the type of the fiber, and at 25C, the high modulus is 775, and the high-strength carbon fiber is 1500 per centimeter. This results in the highest specific strength and specific modulus of the carbon fiber in all high performance fibers. Compared with titanium, steel, aluminum and other metal materials, carbon fiber in the physical properties of a large intensity, high modulus, low density, linear expansion coefficient and other characteristics, can be called the king of new materials. Carbon fiber is one of the main users of carbon fiber in the field of sports and leisure, such as golf clubs, fishing rods, tennis racket badminton rackets, bicycles, ski poles, snowboards, windsurfing masts and sailing hulls. Carbon fiber used in daily necessities, such as audio, Yuba, heaters and other household appliances and mobile phones, laptops and other electronic products can also see the carbon fiber figure. [11] Three important applications in sports are the bat and racket frames. It is estimated that the production of bat each year to 34 million. 40% of the world's carbon fiber rods are made of carbon fiber. The production of carbon fiber fishing rods around the world is about 20 million per year. The market capacity of the racket frame is about 6 million per year. Other sport applications include ice hockey sticks and ski poles. Carbon fiber is also used in boating, rowing and other marine sports. Carbon fiber cloth, also known as carbon fiber cloth, carbon fiber cloth, carbon cloth, carbon fiber fabric, carbon fiber belt, carbon fiber sheet (prepreg cloth). Carbon fiber cloth is a one-way carbon fiber products, usually 12K carbon fiber silk weaving. Weight is the lightest 1K carbon cloth, carbon fiber frame bicycle, tripod basic use 3K carbon cloth. 1K carbon fiber pipe as a result of the grade from the carbon wire, resin composition, density of carbon cloth, molding pressure and temperature processes are very strict, 1K carbon cloth price is 3K carbon cloth 3 times. Two thicknesses are available: 0.111 mm (200 g) and 0.167 mm (300 g). Carbon fiber cloth with high strength, small density, thin thickness, the basic does not increase the weight and cross-section reinforcement components size. Carbon fiber is widely used in building bridges and tunnels and other structural types, structural shape of the reinforcement repair and seismic reinforcement and node structure reinforcement.

 

Commodity Commitment FCFB FW store is the only brand Alibaba flagship store, we solemnly promise, All products are authentic, in the shop to buy goods are provided after-sales service.   About the use After the purchase of products due to improper installation or irresistible natural destructive (such as a strong collision, etc.) Damage, is no longer the list of warranty services.   About size Before purchase, please select the appropriate size according to the shop size comparison table if you purchase the product Size does not fit, please sign within 48 hours from the date of the new, non-polluting, tag integrity, Does not affect the case of the second sale of contact with our customer service replacement, as a result of quality problems The freight generated by the customer you bear.   About color OUR all products are in-kind shooting, post-processing, due to light and display color bias Poor, the individual to understand the different factors such as color, there may be some color with the actual product, Color to prevail in kind, this problem does not belong to quality problems.   On aftermarket OUR commitment to all products 7 days no reason to return, the emergence of quality problems of products, please Signed 24 hours after contact with our customer service, we will unconditionally return for you. ​