Rapide CLX II
Rapide CLX II
Stability Equals Speed
Deep-section front rims are affected adversely by crosswinds. This negatively impacts handling, in turn causing a rider to slow down. By utilizing the first modeling algorithm designed around riders’ real-world reaction times and validated by on-road testing, we developed a front rim that both reduces drag AND increases stability by 25% in sudden wind gusts compared to our previous 50mm rims.
Two Rims, One Goal
To build the fastest wheels possible for the dynamics encountered in real-world conditions, we developed distinctly different shapes for the Rapide CLX II front and rear rims. The result is a wheelset that catches less drag than most 65mm wheelsets and brings a dramatic 25% improvement in stability over 50mm rims in gusts, all while weighing less than many climbing wheels. Mission accomplished.
We know from extensive reaction timing studies that it’s wind gusts between 0.5 and 2.0 seconds that riders struggle with. A rider reacts after the wind gust is over, causing an overcorrection, which is why blustery crosswinds feel so sketchy. In this graph, we see steering error and wind gust frequency. The orange line represents the level of steering error of a bike alone, while the blue line is steering error with a rider. Between 0.5 and 2.0 seconds a rider can make the steering error up to 80% worse. We created an algorithm to optimize stability in this time frame.
Hooked on Tubeless
The reduced rolling resistance of a tubeless setup is undeniable, as are the benefits of improved handling and incredible puncture protection. The development of the Rapide CLX II involved the most rigorous and extensive engineering and testing program that we’ve ever undertaken and resulted in a wheelset that almost doubles current industry impact standards while managing to achieve the lightest weight possible. The Rapide CLX II utilizes a hooked rim (allowing for real-world riding pressures up to 110psi, if that’s your thing) for secure tire bead retention and an easier set up and mounting experience than ever before. This is tubeless done right.
Kissing Drag Goodbye
The rear wheel is the last thing the wind sees, so we developed that rim shape to minimize drag at the trailing edge of the bike. At 60mm deep with a 30mm external width, the Rapide CLX rear rim reduces turbulence and yields the greatest aerodynamic benefit. Since the rear wheel doesn’t affect steering the way the front does, this deep section doesn’t adversely impact handling. Together, they represent the fastest package for real-world race conditions.
In head-to-head tests vs CLX 64 and 100mm TT specific competitors, the Rapide CLX II measures less than a watt of aerodynamic drag slower at 50kph at low yaw, and much faster at higher yaw angles.
Our AeroFlange hubs are aerodynamically optimized, with wide bracing angles for increased strength and reduced spoke weight. They also benefit from the reduced weight and increased strength of ceramic SINC bearings and the legendary durability of DT Swiss’ EXP freehub internals. Designing the hub and optimizing the spoke count enables us to lay up rim reinforcement exactly where it’s needed, at the spoke nipples, and then drill the spoke holes at precisely the angle that they will intersect with the rim. Weight is minimized, and strength is optimized.
Minimum Rolling Resistance, Maximum Performance
“SINC ceramic bearing by DT Swiss not only reduce rolling resistance to an absolute minimum, they’re designed as a system with EXP hub internals. This means incredible durability and longevity in all conditions thanks to tolerances within a few thousandths of a millimeter.”
Rapide CLX Cabon Clincher, 700c, Disc Brake, Tubeless
F: 51mm Depth, 35mm External Width, 21mm Internal Width; R: 60mm Depth, 30.7mm External Width, 21mm Internal Width
DT Swiss Aerolite T-head, Radial/One-cross (2:1) 18 count, DS: 257mm, NDS: 252mm
DT Swiss Aerolite T-head, One-cross/Two-cross (2:1) 24 count, DS: 243mm NDS: 249mm
DT Swiss Hex Prolock Al 2.0x14mm
Roval AFD (AFD01) Center Lock, 100x12mm
Roval AFD (AFD02R) Center Lock, DT Swiss Ratchet EXP 36t internals (10 degs), 142x12mm, Shim. RD. 11SP HG freehub
DT Swiss SINC Ceramic Bearings
Hand Built / Roval Rim Tape, Spare Spoke & Nipple Kit
Wheelset 1,520g, Front 710g, Rear 810g (including 15g, tubeless rim tape and tubeless valve)
275lbs / 125kg
24mm - 38mm
Max Pressure: 24mm-35mm: Tubeless (110psi) Tubed (130psi), 36mm – 38mm: Tubeless (60psi) Tubed (60psi)
Tire Pressure Recommendations
The right tire pressure has a huge impact on the quality of your ride. What you see below are recommended starting points. Tire pressure is personal and depends on your riding style and the terrain you'll be riding so don’t be afraid to experiment to find your perfect pressure, but never exceed the max pressure indicated on your rims. Enjoy your ride!
• Pressure ranges listed below are based on the rear wheel. Ride 0.3 bar /5 psi lower in your front wheel than rear.
• From these recommendations, adjust up and down in 0.2 bar/4 psi increments to find your ideal pressure.
• For wet conditions, improved traction, or more comfort drop tire pressure 0.5 bar/7 psi on both wheels.
• Never exceed the tire pressure limits of either the rim or the tire.
Still Have Question If Our Components Are Right for You?
Call Us at 1 (877) 808 - 8154
How we made it
Made in Racing
“We want the fastest option, and tires are faster than tubulars. This is a fact. Well, the next step we know it's tubeless. We raced tubeless already. We won with tubeless already.” - Ricardo Scheidecker, Technical and Development Director, Quick-Step Alpha Vinyl
We are always chasing the fastest way from A to B, regardless of what that technology is. For the last two seasons, our tube-type wheels won 155 races on the World Tour—more than any other wheels. But we knew tubeless had the potential to make these wheels even faster. It took two years and the biggest development and testing program ever undertaken by Roval, but we can now say tubeless is truly ready.