ABOUT TOP-FIRE   Xiamen Top-Fire Sports Equipment Co., Ltd. is not just another carbon fiber parts factory but playing a leading role and with a solid reputation in the field of carbon fiber technology development of OEM in China, and we are a professional carbon bike parts manufacturers, focus on the carbon bike frame,  carbon bike forks, carbon bike rims, and other carbon bike parts for many years. More than 20 world class, well trained, full of cycling industrial experienced engineers, designers, material scientists, and support technicians have formed the main core of the Top-Fire technical team. The Top-Fire technical team has had served name brands from racket brands like Wilson, Prince to the cycling brand Specialized, BMC, Scott, Cevelo, FFWD, Ritchey, Fondriest, Bianchi, BH, and so on. Top-Fire also has established technical cooperation with leading Chinese universities, as well as European bicycling and material consultants, that enables Top-Fire to accumulate wealthy developing data and lots of know-how which just for Top-Fire only.  Top-Fire understands that even the most creative concepts, the finest advanced technology, or the latest material science mean little without close association with the cutting-edge test. That's why Top-Fire is proud of our modernized, well-equipped, and staffed product testing center which is outstandingly among carbon fiber bicycle parts manufacturers in China. The most advanced equipment and facilities are used to test the limit of every Top-Fire product. Specific equipment is to test the fatigue and impact the performance of carbon fiber frames, forks, rims, handlebars, stems, and seat posts. Top-Fire tests to all recognized international standards (EN, JIS, ISO, GB, and so on) and its internal factory standards which are more crucial than international regulations. Finite element analysis, stress testing, and engineering, all these works are invested to develop prototypes, despite the expense and manufacturing time. Top-Fire also recognized that laboratory test is only part of the picture. That is why Top-Fire has kept a close relationship with several professional teams and individual champion athletes, who provide real-world performance tests of Top-Fire products and develop data from the field of the professional race. Every designer and brand deserved their factory. Top-Fire connects the idea, brain, and manufacturer with good knowledge and experienced sourcing service.  In Top-Fire you will get the best quality OEM manufacture services that make your business fruitfully. OUR FACTORY We are not only doing product production and processing,  but We also take the time to customize products that suit our customer’s needs and expectations. From special configurations, custom decals, we offer options to reflect the lifestyles of our customers. In TOP-FIRE, I believe that you will find your satisfactory products and services here. At present, there are about 180 workers in our carbon rim factory and about 150 workers in our carbon frame factory. Our current production capacity is: carbon frame ---> 2000 sets/month carbon fork ---> 3500 pcs/month carbon rim  ---> 5000 pcs/month carbon wheel ---> 1200 pairs/month Carbon Fiber Wheel Rim Test Report Rim UCI Impact Test This test simulates the impact a rim may face during extreme riding conditions. With the rim set up without spokes, a vertical free-fall impact is applied directly to the spoke hole area, in accordance with UCI standards. Result: The rim withstood the repeated impacts without cracks or structural damage, fully meeting UCI certification requirements. Rim Positive Rigidity Test Rigidity testing evaluates how the rim responds when subjected to vertical loads. In this test, the rim was mounted on a machine and gradually loaded with forces of 10 kg, 20 kg, and 30 kg. The corresponding deformation was measured at each stage, and the stiffness values were calculated. Result: The rim achieved an average rigidity of 197.3 N/mm. The rim maintained stable stiffness across different loads, ensuring excellent responsiveness and stability for high-performance riding. Walking Fatigue Test The walking fatigue test simulates long-term riding conditions to evaluate rim durability under repeated impact. In this test, the rim was run at a constant speed of 40 km/h while the tire struck obstacles measuring 10 mm in height and 50 mm in width. The setup included a load of 64 kg, a swing angle of 5°, and tire pressure at 90% of the maximum rating. Over the course of the test, the rim experienced approximately 900,000 continuous impacts. Result: After 12 hours and 58 minutes of testing, covering a distance of 535 km, the rim showed no abnormalities in its structure, tire mounting area, or outer circle. These res...