Zipp 454 NSW Tubular Disc 700c Front Wheel

Zipp's top road pros demanded they offer the revolutionary Zipp 454 NSW as a Tubular, so they made it just for them… and for you! The 454 NSW Tubular Disc-brake wheelset brings together the advanced aerodynamics and stability of its biomimicry-derived Sawtooth™ rim profile with the benefits of disc braking. This wheelset was developed for professional racers as well as cyclists who prefer the time-proven ride qualities of riding tubulars with cutting-edge aero technology. Utilizing the principles of the emerging science of biomimicry, Zipp engineers studied the environment around them for instances of how nature achieved speed, control, and efficiency. A humpback whale’s fast and graceful movements thanks to the tubercles on its pectoral fins. These structures inspired Zipp advanced development engineers to, for the first time, systematically apply biomimicry to solve the complex challenge of designing a wheel, with the undulating Hyperfoil™ nodes, that reduces both aerodynamic drag and side force. The 454 NSW’s Cognition DB V2 Hubset is re-engineered with Axial Clutch V2™ for quicker engagement and lower friction Every time a conventional hubset starts to coast, friction within the freehub ratchet mechanism works like a drum brake to slow the rider down. The drag between the hub shell and driver body during coasting is considered as efficiency loss, especially for road wheels. The solution? The rear Cognition V2™ hub with AxialClutch V2™ technology reduces drag by disengaging the ratchet mechanism when coasting. The AxialClutch V2’s™ wave spring acts to re-engage the ratchet mechanism quickly and consistently once the rider starts pedaling. The hubset also is lightweight and durable.

Technologies

ABLC SawTooth

ABLC Sawtooth dimple design helps manage air flow around the rim, and contributes to create a faster, more stable wheel.

Cognition Hubset

With the Cognition hubset’s Axial Clutch technology, we’ve reduced this drag by disengaging the ratchet mechanism when coasting. So you can approach corners at higher speeds, and ultimately, save time. A star-flanged straight-pull hubshell design on the rear hub distributes the load placed on the hub flange away from the bearings. We’ve also developed a unique scalloped edge hubshell design for Zipp's front hub. This scalloped design maintains the bearing bore diameter when high radial spoke tension is applied. That means you get bearings that quietly stay in place, roll faster, last longer, and provide a laterally stiffer hub.

ImPress

We’ve employed Zipp’s ImPress graphics technology, which prints graphics directly on the wheel, to help allow the dimples to do what they were design to do – help control vortex shedding, the rate at which air sheds off the wheel. Managing this is crucial to stability.

SawTooth

SawTooth is the name given to Zipp NSW’s patented variable depth 53/58mm rims. Developed utilizing the principles of the emerging science of biomimicry, Zipp engineers began the rigorous aero development process of SawTooth utilizing the wind tunnel, CFD, and real-world testing. The result is a rim shape that takes nature’s most elegant design solutions and combines engineering precision to deliver a wheel that performs unlike any made before. This patented new rim shape achieves something conventional aero wheels cannot; it simultaneously reduces both aerodynamic drag and side force for the ultimate in AeroBalance. Sawtooth accomplishes this with a series of patented fin-shaped Hyperfoil nodes along the inner diameter of the rim that work together with Zipp's new HexFin ABLC dimples for improved airflow. The result is Zipp’s highest performing wheelset ever realized with both aero-drag reduction and reduced side force at all wind yaw angles. This is important because higher wind yaw angles are where bike handling is most affected by the wind.

Hyperfoil

Hyperfoil is the name given to the individual nodes on Zipp NSW variable depth Sawtooth rims. Each of these patented structures features Zipp's HexFin ABLC dimples that help to stabilize handling in gusting wind by increasing wind vortex shedding frequency. The higher frequency vortex shedding produced by Sawtooth creates a greater number of smaller, less powerful, yet more predictable vortices leading to greater wheel stability. This added stability translates into greater rider control, thereby saving energy that is typically expended trying to hold a line in gusting wind. The result is a faster, more confident riding experience whether you are laying down power or descending sinuous mountain roads.

HexFin ABLC

HexFin ABLC dimples are the hexagonally shaped depressions found at each Hyperfoil of Zipp's Sawtooth shaped NSW rims. The angular shape of each dimple increases boundary layer mixing to help keep airflow attached to the rim for reduced aerodynamic drag and improved stability in crosswinds. To further improve the effectiveness of the hexagonal dimples, they are arranged in fin-shaped clusters made up of variable sized dimples that work in concert with each Hyperfoil of a Sawtooth rim.

Axial Clutch

With Cognition’s Axial Clutch technology, we’ve reduced this drag by disengaging the ratchet mechanism when coasting. With less internal hub drag a rider can pedal less when drafting in a headwind, achieve higher speeds when coasting in an aero tuck, or opt to stop pedaling a moment sooner before entering a corner and bank that wattage for use exiting the corner. Axial Clutch technology also allows riders to maintain speed through corners that don’t require braking input, thereby increasing corner exit speeds. Inside the Axial Clutch mechanism theyuse magnets, rather than steel springs, to move and engage Zipp's light weight Metal Injection Molded (MIM) ratchet rings for unmatched reliability and consistent operation. With 36 points of engagement that all interlock simultaneously, there isn’t a more secure freehub mechanism on the market.

AeroBalance

Zipp’s sole mission is to help you go faster. That's why Zipp's wheels are race-ready before they're camera-ready. For years, Zipp has used a combination of testing methods – wind tunnel, CFD computer simulations, pro athlete evaluations, on-road testing, and the RollingRoad ride simulator – to refine aero performance to new levels of excellence. Over the decades of innovation, Zipp's engineers have learned to look beyond just focusing on simply reducing aero drag. Instead, the goal now is to reduce aero drag while also minimizing the effects of crosswinds on handling. This optimizing of aero efficiency and crosswind stability became known internally at Zipp as AeroBalance. The approach began with Firecrest technology and has been advanced with the introduction of the NSW lineup, especially with the Sawtooth technology found in the 454 and 858 NSW. Sawtooth accomplishes this with a series of patented fin-shaped Hyperfoil nodes along the inner diameter of the rim that work together with Zipp's new HexFin ABLC dimples for improved airflow.

XDR

The XDR driver body is a universal mounting system for cassettes that incorporate cogs with fewer than 11 teeth. It allows for lighter and more versatile drivetrains without requiring new rear axle standards, cassette tools or hub redesigns. The XDR interface is 1.85mm longer than XD and is designed for road hub applications. XDR driver bodies are compatible with all XD cassettes when the cassette is installed with a 1.85mm spacer.

ABLC SawTooth

ABLC Sawtooth dimple design helps manage air flow around the rim, and contributes to create a faster, more stable wheel.

Features

• A cosmetic identity that screams speed, Zipp graphics applied using Zipp’s ImPress™ direct-print technology
• Cognition DB V2 hubset rolls efficiently whether you are pedaling or coasting. Its Axial ClutchV2™ technology reduces drag and lowers friction
• Sawtooth™ rim with Hyperfoil™ nodes and HexFin™ ABLC dimple pattern for top aero and crosswind-stability performance with an undulating 53/58mm rim depth
• Center locking rotor interface. Lockring is included
• XDR™ or SRAM/Shimano driver bodies
• Ships with 12mm front and rear end caps
• Campagnolo driver body sold separately
• Lifetime Warranty

Specifications

• Size: 700c
• Rim Construction: Carbon - Hookless
• Hub: Cognition V2
• Tyre Compatiblility: Tubular
• Rim Depth: 58mm
• Brake Compatiblility: Disc (Center Lock)
• Driver Body Type: SRAM XDR, SRAM / Shimano Road
• Inner Rim Width: 23mm
• Max Recommended System Weight: 250lbs / 114kg
• Max Tyre Pressure: 73psi / 5.0bar
• Rim Finish: UD fiber, Impress technology
• Rim Profile: Symmetrical
• Spoke Length: 248mm, 254mm