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Roval CLX 50 – Tubular Rear

Roval CLX 50 – Tubular Rear

Part No. 30017-8302

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First came our CLX 64. Then the 32s. And after racking up multiple wins in Grand Tours, Worlds, and everything in between, we knew that our best bet was to take the line to new heights, or well, new depths. We needed to design one wheel that was a true quiver killer. One wheel that had all the aerodynamic benefits of the 64 in a package that climbed like the 32, and that’s where the all-new CLX 50 comes in.

When we set out to create the CLX 50, we had clear goals in mind—create wheels that are 48 to 54mm deep, aerodynamically optimized, ultra-wide, and under 1400 grams. This meant that they'd have to borrow some weight savings techniques that we developed for the CLX 32, while taking some aero guidance from the CLX 64, if we were going to create what we like to call “the unicorn wheel.

Even though the CLX 50 is similar in weight to many wheels in the “lightweight” category, aerodynamics came at the forefront of the development. With this, we jumped headlong into Computational Fluid Dynamics computer modeling to arrive at various rim shapes that could make the CLX 50 as fast and light as possible. It took a while, but we narrowed the rim shape down to three contenders that were then CNC machined into rims, built into wheels, and put into the Win Tunnel.

The tubular version of the CLX 50 also features a rim design that differs from the clincher version, in order to be aerodynamically optimized for tubular tires. And to prove our concepts, we tested every wheel, ours and the competition's, with a 24C tire (measuring 26C), as tires can drastically affect testing. We chose a modern-width tire to design our rims around, because they not only allow for less tire pressure (which results in more comfort and less rolling resistance) but are also just as aerodynamically efficient when paired with the correct rim width.

After finding the optimized rim shape that supported our svelte weight requirements, we opted to lace this rear rim, via 21 DT Swiss Aerolite spokes, to our Aero Flange (AF) hub with the legendary CeramicSpeed bearings and DT 240 hub internals. And when it was time for final testing validation, we were left with a 50mm-deep, 1230-gram tubular wheelset that's not only ~ 275 grams lighter than the competition’s similar depth wheels, but is also measurably faster in every conceivable test than each wheel in its category.

我们首先推出了CLX 64,然后是32。在获得了多次大环赛和世锦赛,以及其他重要赛事的胜利之后,我们觉得应该把产品先推上新的高度。我们需要设计一款轮组,一个真正的大杀器。一款拥有64的空气动力学优势,爬坡表现又能够像32那样的轮组。这就是我们全新的CLX 50。 当我们设计CLX 50的时候,我们有明确的目标——轮组大约48-54毫米的框高,空气动力学优化,宽圈,低于1400克。这意味着它需要从我们研发CLX 32的经验中吸取一些减重技巧,并且从CLX 64那里获得空气动力学方向,与此同时保持我们所喜爱的碟刹的优势,这样才能够将我们所创造的称为“独角兽轮组”。 即使CLX 50与很多被归为“轻量化”轮组相近的重量,空气动力学依然是研发时的重点。因此我们采用了流体力学计算,在电脑中模拟多种车圈形状,让CLX 50更轻更快。这花费了不少时间,但是我们将车圈造型筛选到只剩三款,并且CNC切削出车圈来,编好轮组,放进了我们的风洞。 管胎版的CLX 50车圈设计和开口版本不同,它专门为管胎进行了优化。为了证明我们的概念,在风洞中,我们测试了每一个轮子,我们的以及我们竞争对手的,并在测试中装配了24C外胎(实测26C)。因为轮胎会大幅度影响测试结果,所以我们选择了围绕一个中等宽度来设计我们的车圈。因为它不仅能让车手使用更低的胎压(带来更好的舒适性和更低的滚阻)同时在与合适宽度的车圈搭配时也更加破风。 在找到最符合我们严苛重量要求的车圈造型之后,我们选择将它通过21根DT Swiss Aerolite辐条与我们的Aero Flange(AF)花鼓相连,它采用了传奇的CeramicSpeed培林和DT Swiss 240花鼓内件。最后,它成为了一款50毫米框高,1230克的管胎轮组。