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Roval CLX 64 Disc – Rear

Roval CLX 64 Disc – Rear

Part No. 30017-7001

Size Chart

When we set out to create a wheelset built purely for speed, we wanted to make it more than just fast. Not that being fast wasn’t a priority, but we were tired of wheels that only performed well in a straight line. In the end, we developed the CLX 64 Disc, the fastest wheel that we've ever tested with all of the performance benefits of disc brakes we have come to love. This iteration has a more impact-resistant rim, a disc-specific carbon layup that optimizes stiffness and weight, and incredible brake modulation and power in all conditions.

One of the first questions we get about the CLX 64 is, “Why 64mm instead of 65mm?” To put it simply, it's because 64mm simply tested faster than 65mm. One millimetre—that's how deep our testing goes. Having an in-house wind tunnel allows us to run every possible variation, and after two years of development, 80 variations in rim design, and nearly 300 hours studying tire and frame interactions in the Win Tunnel, we found 64mm to be the fastest iteration for normal riding conditions. In fact, it's even faster than the 80-plus-millimeter-deep wheels they were tested against. Being able to use a shape that’s nearly 20mm shallower than the competition, yet just as low in drag, makes for a wheel that has drastically less side force and steering torque. This translates to less buffeting and more confidence in even the gustiest winds.

Another positive of a shallower rim depth is the reduction in weight that follows using less material. Many deep carbon wheels feel “slow” due to their high inertia value. What's that? Inertia is the amount of force it takes to accelerate or decelerate, and wheels that are built around heavier rims lack the liveliness that many riders crave. Being over a half-a-pound lighter than the other wheels in its aero category, the CLX 64 accelerates, decelerates, and changes direction with less effort.

The rim is not the only component of the CLX 64 that contributes to its aero prowess though—in order to create the fastest wheels, we focused on the wheels as a system, not just a rim with “other parts,” and our Aero Flange (AF) hubs play a significant role. Designed completely in the Win Tunnel, our AF hubs feature an incredibly small frontal aero, without sacrificing stiffness, making them aerodynamically efficient.

Taking the advantage a step further, these wheels were developed to work in harmony with modern-width 24C tires. The 21mm internal rim width spreads the tire out, in this case to 26C, making it seamlessly meet the rim. Not only does this create a system with low aerodynamic drag, but one that has exceptionally low rolling resistance and inspiring grip in the corners. And to make sure we checked all of the feature boxes, we also made the rim tubeless-ready.

To top off the multitude of performance features of the rim, we chose the highest quality build components to pair the CLX 64 with. Starting with DT Swiss Aerolite bladed spokes, which test faster than their round counterparts in the Win Tunnel, we hand-lace the 64 rim to our AFD hubs that house CeramicSpeed’s legendary bearings and DT 240 hub internals. Why hand-built? Machines make mistakes and mistakes aren't something we're ok with, so we have real people lace each wheel by hand.

  • Rim Type: Carbon clincher, 2Bliss Ready
  • Rim Material: Carbon
  • Braking Surface: Disc brake only
  • Rim Depth: 64mm
  • Rim Width: 20.7mm internal, 29.9mm external
  • Spoke Pattern: One-cross/Two-cross (2:1)
  • Spoke Count: 24
  • Spoke Type: DT Swiss Aerolite T-head
  • Nipple Type: DT Swiss Pro Lock hexagonal
  • Rear Hub: Roval AFD2, Centerlock, CeramicSpeed bearings, DT Swiss 240 internals, 11-speed, quick-release or 142x12mm thru-axle end cap
  • Assembly Method: Hand-built
  • Extras: Roval padded wheelbag, Roval steel quick-release, Roval tubeless plugs and tubeless valve,142x12mm thru-axle & quick-release end caps
  • Weight: 880g
当我们决定打造只为速度而生的轮组的时候,我们想要让它不仅仅是快。并不是说快不是重点,而是我们已经厌倦了只有直线性能的轮组。最终,我们研发了CLX 64——这是一个速度性能非常卓越的轮组。它不仅在风洞中较快,并且已经通过2016 UCI世锦赛的男子公路赛,计时赛,团队计时赛证明了自己。 关于CLX 64,我们经常首先被问到,“为什么是64毫米而不是65毫米?”简单回答,因为64毫米在测试中比65毫米更快。1毫米,这就是我们测试的细致程度。拥有自己的风洞让我们可以测试多种组合,在两年的研发,80种车圈设计,以及风洞中近300小时对轮胎、车架和轮组相互影响的研究,我们发现64毫米是普通骑行环境下较快的版本。事实上它比超过80毫米的高框轮组更快。能够使用低将近20毫米的框高,却获得同样的低风阻,让轮组的侧向受力和转向扭矩显著降低。这意味着即使在大风中更少的晃动和更强的自信。 低框高带来的另一个好处是由于用料更少而带来的重量优势。很多高框轮组脚感比较慢,因为它们的惯性大。惯性是加速或者减速所需要的力,而用更重的车圈编制的轮组缺少很多骑士想要的活力。 车圈并不是带来CLX 64空气动力学优势的唯一零件。为了让它更快,我们将轮组作为一个整体系统看待,而不是车圈加其他零件。我们的Aero Flange(AF)花鼓也功不可没。完全在风洞实验室中设计的AF花鼓拥有很小的迎风面积,却不牺牲刚性,让它们高效破风。 更进一步,这款轮组能够与现代流行的24C轮胎紧密协作。21毫米内宽的车圈让车胎充分展开,宽度达到26C,让它与车圈紧密连接,不仅让整体风阻变小,同时也带来更低的滚阻,和弯道中更强的循迹性。为了确保将来的需求得到满足,我们还将车圈做成了准真空。 为车圈的优越性能锦上添花,我们采用高品质的配件来打造CLX 64。DT Swiss Aerolite扁辐条,在风洞中比圆辐条更快,我们将它们手工与64车圈以及我们装有传奇的CeramicSpeed培林,DT 240内件的花鼓编制在一起。为什么手工编制?机器会出错,那是我们不能容忍的,所以我们要求真人来手工编制每一个轮子。