Rims In designing the Drive Helix 46D wheelset, the goal was to create something that ticked all of the boxes. It had to not only be aero, light, laterally stiff, strong, but also crosswind resistant. To accomplish this, we used our in-house UNI carbon fiber, which is a mixture of our custom resin and genuine Japanese Toray T800 an T1000 carbon fiber. It allows our wheels to be stiff, light, and strong enough to go far beyond the UCI’s vertical impact test. Our patented undulating rim profile draws on inspiration from the tubercle effect found widely in nature, allowing for a significant improvement in stability in windy conditions. The wheels are aerodynamically optimized for 28-30mm tires. The front wheel’s wider 31.8mm external width improves airflow around the rim, offering further stability in crosswinds. Both the front and rear rim depths were also chosen specifically to the needs of road riders. The Drive Helix 46D’s mixed depth wheels allow for the best of both worlds when it comes to aerodynamics, weight, and control. Spokes No stone was left unturned when designing the Drive Helix 46D. Newer, more aerodynamic carbon spokes were selected without sacrificing weight or durability, allowing them to remain approximately 3 grams each. These 5.2mm spokes are the most aerodynamic of their kind available. What makes our spokes special is that unlike bonded carbon fiber spokes, these are replaceable just like traditional steel spokes. Using a more advanced design, Drive Helix spokes do not experience spoke twist, so they are always in the most aerodynamic orientation and do not lose spoke tension over time. Hubs What makes the Evolution hub unique is our Helical Dual Ratchet System, the first of its kind. This freehub mechanism uses a helical drive mechanism, which uses the torque from pedaling to force the ratchets together. This prevents the slipping and skipping that is experienced under high torque on other hubs. It also allows for a weaker spring, reducing rolling resistance and as well as ratchet tooth wear, making them last longer. The hub also makes uses of two separate 60 tooth offset ratchet mechanisms, making it the highest engagement ratchet style hub available at only 3° or 120 points of engagement. When designing the Evolution hub, no stone was left unturned. The freehub body is made of titanium alloy, making it not only highly resistant to wear from the cassette, but also lightweight. High grade precision TPI ceramic bearings were chosen to improve longevity and reduce rolling resistance. Our CNC machines have 0.02mm tolerances, guaranteeing a perfect bearing fit, decreasing rolling resistance and further increasing the lifespan of the bearings. Aerodynamic Testing At Elitewheels, we see value in ensuring what we offer performs rather than just looking good on paper. In addition to the the 20+ laboratory test at our factory, we also employ CFD testing as well as real world testing by our pro teams and riders. CFD (Computational Fluid Dynamics) allows us to aerodynamically optimize wheelsets before even producing the first prototype. During the design phase, we conduct a series of advanced computer simulations that take hundreds of hours each. After our engineering team is satisfied, we are ready for stress testing in our lab. Once the development of our wheels is finished, we not only test the wheels out ourselves, but we also send them to professional cyclists. We are working with our sponsored UCI continental pro teams and riders, getting their feedback. Their experience riding hundreds of thousands of kilometers each with a large number of wheelsets gives us a unique perspective. The Drive Helix 46D was designed to be the perfect climbing wheelset. Being part of our first ultra-premium wheel series, it has been optimized for not only tackling the toughest climbs, but also for the sprints due to its low inertia. Drawing inspiration from our popular Drive road wheels, the 46D uses replaceable carbon spokes, UNI carbon fiber, and TPI ceramic bearings. What sets these new wheels apart isn’t just the new aero, undulating rim profiles and improved carbon spoke design, but also our innovative Helical Dual Ratchet System, which gives this new wheelset its name. Since the hubs used in Drive Helix wheels are manufactured in Elitewheels’ factory, freehubs from other brands are incompatible. The hubs used in Drive Helix wheels have passed our 20,000km test. As long as you ride in normal conditions, the possibility of the freehub getting damaged is very low. If you ride in extreme conditions, we recommend you clean the freehub every 3000km. Unlike quick releases, there are many thru-axle standards. What you need depends on your frame's make and model. There are many thread types, such as M12x1.0mm, M12x1.5mm, M12x1.75mm, etc... For example, M12 means the outer thread diameter is 12mm, and 1.0mm means the thread pitch is 1.0mm. Because of the variety of standards, we do not provide thru-axles. If you need a new thru-axle(s), please contact your frame brand for more information. Internal nipples are not available because the nipples for carbon spokes are specially processed. The contact angle between spokes and spoke holes is extremely important. Spokes should not directly come into contact the rim directly, otherwise there would be a high likelihood of having spoke break. As all our our hubs have high-precision manufacturing tolerances, bearing play is significantly reduced. Because of this, the likelihood of bearings being damaged is extremely low. The rider weight limit includes the total weight of the rider, bike, gear, and any other accessories. Please do not exceed this weight. The best tire pressure for you depends on many factors: the rim width, type of bike and tires, rider weight, road conditions and weather conditions. Please see our user guide for more information. Every one of our carbon rims has been strictly tested before shipment. We are so confident in the quality of our rims that we offer a 3-year warranty on every one. To learn more, please refer to our warranty page. Our threaded carbon spokes have been designed to last. In the event that a carbon spoke breaks, replacement is easy. Each wheel comes with replacement spokes that can be replaced like traditional steel spokes. For more information, please see this article. For information on where to get spokes replaced, please contact our customer service. Every one of our carbon rims has been strictly tested before shipment. We are so confident in the quality of our rims that we offer a 3-year warranty on every one. We also offer a crash replacement policy. To learn more, please refer to our warranty page.