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Qarbon owns this principle and places the RIGHT MATERIAL IN THE RIGHT SPOT, 7075-T6 aluminum in perfect composition with high modulus carbon fiber.
53 tooth ROTOR Qarbon Q rings available from Velotech Services
First shown at Eurobike 2015 for the first time we presented to the world our latest addition to our already wide range of Q-Rings: the Qarbon chain ring, crafted from 7075-T6 CNC´d aluminum and 3K woven high modulus carbon fiber. A real COMPOSITE product! By definition a composite material is made of two or more constituent materials. A phenomenon called a "paradox of materials" shows that each of these materials is improving its own properties when combined in a composite material. An easy example to explain this paradox is the most commonly used material composition used in the bicycle industry: carbon fiber. Fragile raw carbon fiber filaments are held in place and protected by a matrix system, many times made of epoxy resin, which allows the fibers to become a powerful load carrier. Brittle and weak plastic-based materials used as a resin system become stronger and stiffer thanks to the reinforcement of the carbon fibers. Qarbon owns this principle and places the RIGHT MATERIAL IN THE RIGHT SPOT, 7075-T6 aluminum in perfect composition with high modulus carbon fiber.
Carbon fiber used in a smart way: Carbon fiber is ideal to improve weight and stiffness. A 3K woven, high modulus carbon sheet is bonded on the outside of chain ring reinforcing the chain ring´s structure. Carbon fibers´ structural properties allow for a more aggressively machined aluminum section in comparison with a conventional aluminum chain ring. At the same time the stiffer carbon fiber sheet is increasing lateral stiffness and improving shift quality, which depends upon other factors, like bottom bracket shell stiffness as well as chain ring stiffness. The result is an 8% lighter chain ring with 20% increased stiffness – and a beautifully looking chain ring.
Aluminum expertise - no sacrificing performance: ROTOR chain rings are known for their superior shift quality – they can be spotted on pro cycling team bikes not even sponsored by ROTOR. We rely on our precise CNC production techniques to manufacture our aluminum chain ring teeth and shift gates in our in-house production facility in Madrid. This allows us to maintain our well-known, precise shifting performance for all drivetrains on the market without compromising performance throughout the lifetime of the Quarbon chain ring. The chain plus debris have little impact on our teeth profile – something full carbon fiber chain rings suffer from.
The Qarbon chain ring offers all 5 Optimum Chainring Position (OCP) adjustments already present in our existing Q-Rings. Qarbon is designed to work with all 9, 10 and 11-speed drivetrains. It is available in 110 BCD and offers 3 versions: 53, 52 and 50 teeth. Qarbon can be combined with any 110 BCD inner ROTOR 5 arm chainring. These do not fit the Shimano 4 bolt 110 BCD.