Specialized Roval CLX 64 Tubular 28 Inch - Rear Wheel - Tubular - QR - carbon/gloss black

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Description of Specialized Roval CLX 64 Tubular 28 Inch - Rear Wheel - Tubular - QR - carbon/gloss black

When Specialized set out to create a wheelset built purely for speed, they wanted to make it more than just fast. Not that being fast wasn’t a priority, but they were tired of wheels that only performed well in a straight line. In the end, Specialized developed the CLX 64—the fastest wheel that they've ever tested. Not only is it the fastest in the tunnel, but its prestige has been verified with Gold Medals in the men’s road race, time trial, and team time trial at the 2016 UCI World Championships.

Specialized Roval CLX 64 Tubular features:

  • Rim Type: Carbon tubular
  • Rim Material: Carbon
  • Braking Surface: Carbon fibre
  • Brake Track Height: 12mm
  • Rim Depth: 64 mm
  • Rim Width: 27.4mm external
  • Spoke Pattern: Radial/Two-cross (2:1)
  • Spoke Count: 21
  • Spoke Type: DT Swiss Aerolite T-head
  • Nipple Type: DT Swiss Pro Lock hexagonal
  • Rear Hub: Roval AF1, CeramicSpeed bearings, DT Swiss 240 internals, 11-speed
  • Assembly Method: Hand-built
  • Extras: Roval padded wheelbag, Roval steel quick-release, SwissStop Black Prince brake pads

One of the first questions Specialized 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 the testing goes. Having an in-house wind tunnel allows Specialized 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, Specialized focused on the wheels as a system, not just a rim with “other parts,” and the Aero Flange (AF) hubs play a significant role. Designed completely in the Win Tunnel, the 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 Specialized checked all of the feature boxes, they also made the rim tubeless-ready.

To top off the multitude of performance features of the rim, Specialized chose the highest quality build components to pair the CLX 64 rear with. Starting with 21 DT Swiss Aerolite bladed spokes, which test faster than their round counterparts in the Win Tunnel, Specialized hand-laced the 64 rim to the AF hubs that house CeramicSpeed’s legendary bearings and DT 240 hub internals. Why hand-built? Machines make mistakes and mistakes aren't something they're ok with, so Specialized has real people lace each wheel by hand.
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Fact Sheet of Specialized Roval CLX 64 Tubular 28 Inch - Rear Wheel - Tubular - QR - carbon/gloss black

Product Name: Specialized Roval CLX 64 Tubular 28 Inch - Rear Wheel - Tubular - QR - carbon/gloss black
Manufacturer: Specialized Equipment
Item Code: SPZ412063
Year: 2019
Manufacturer item code: 30016-7102
Material: rim: carbon
Weight: approx. 775 gram (manufacturer information)
Rim: Carbon tubular
Rim height: 64 mm
external/internal rim width: 27.4mm external
E.T.R.T.O.: 27.4 - 622
Spokes: DT Swiss Aerolite T-head
Nipples: DT Swiss Pro Lock hexagonal
Spokes number: 21, Radial/Two-cross (2:1)
Hub axle system: 10x130mm QR
Fitting type of tire: tubular
Fitting tire dimension: 700c
hub: Roval AF1, CeramicSpeed bearings, DT Swiss 240 internals
Fitting for shifting: 11-speed
Included in delivery: Extras: Roval padded wheelbag, Roval steel quick-release, SwissStop Black Prince brake pads
Manufacturer page: http://www.specialized.com
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