Zipp 404 firecrest carbon clincher wheelset

Zipp's new zipp 404 firecrest carbon clincher wheelset Firecrest rim profile admittedly takes a while to get used to, what with its unusually fat width, nearly board-flat sides, and decidedly blunt nose but when out on the open road the only thing you're likely to think about is, 'holy crap, I'm flying! During one memorable instance on a familiar, fast and slightly ermenegildo zegna jacket grade, we actually had to sit bolt upright and feather the brakes to avoid overtaking a similarly-sized rider that was well up the road and clearly pedaling like mad. If flat land speed is what you're after, these are clearly a good way to get it. So, zipp 404 firecrest carbon clincher wheelset, if your ultimate goal is flat-out speed and you're not interested in tubulars, there's a lot to like with Zipp's new Carbon Clincher - they're fast with a big, fat, capital 'F' and offer handling stability in crosswinds unmatched by other aero wheels we've used.

Here's how you can win it. Zipp released the new Firecrest wheels in the middle of last year. The biggest difference over their previous models is rim shape. These are not just a revamped version of the tubulars. Zipp widened the sidewalls on the Firecrest. As you can see in the illustration below, they are very wide at the tyre The large-radius profile is claimed to produce lower drag figures at a wider range of yaw angles thus improving handling in crosswinds , better overall ride quality, and improved wheel strength.

Zipp 404 firecrest carbon clincher wheelset

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The total weight of the Firecrests is 1,g g front, g rear.

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Yet the Firecrest Carbon Clincher weighs 1, grams per set, providing best-in-class performance at a light weight. The result is improved stiffness, durability, simplicity and versatility. Precision-engineered hubs along with Firecrest technology create something special. Designed specifically to account for the differences in airflow patterns between clincher tires and tubulars, the Firecrest Carbon Clincher exceeds the aero performance of any other clincher wheelset in its class. As Zipp proved with the pioneering and Paris-Roubaix and Tour of Flanders-winning Tubular, a wider rim offers greater vertical compliance for control and comfort on rough surfaces while increasing lateral stiffness for sprinting and cornering. The same holds true for Firecrest rims with clincher tires. And because the hook beads are farther apart, the tire itself takes on a more stable shape without adding rolling resistance. Heavy continuous braking on carbon surfaces can cause spikes in rim temperature and tire pressure that impact performance and handling — especially with clincher tires.

Zipp 404 firecrest carbon clincher wheelset

For an improved shopping experience, we recommend that you use the most recent versions of Google Chrome, Safari, or Firefox. Either you have JavaScript disabled or your browser does not support JavaScript. To work properly, this page requires JavaScript to be enabled or to use the most recent versions of Google Chrome, Safari, or Firefox. Ships after. Currently out of stock until. At 58mm deep, the Firecrest Tubeless is ideal for road races, time trial and triathlon, gran fondos, and riding over varied terrain. With hookless, the transition between the tire and the rim is more seamless and aero.

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These Zipps still accelerate wonderfully, but the stiffness of the Lightweights is hard to beat. Poertner also insists that in-house testing has shown wider tire beds in general to require lower inflation pressures to achieve comparable compliance numbers. Spokes constantly loosening 2. Plus, clincher rims that are significantly lighter or offer a smoother ride - whether they be carbon or aluminum - are apt to be substantially shallower and include fewer aero benefits. Up front, there's a matching collar on the opposite side that doesn't adjust bearing preload but is still rotatable so that both sides are matched. Zipp includes its own cork-based Tangente brake blocks with each set of Carbon Clinchers. The problems still came back though. Ride quality leaves something to be desired, too, with a stiff ride on bad road surfaces despite our relatively supple 23mm-wide Continental GP reference tires. This was an especially big bonus with the Zipp tubulars. During one memorable instance on a familiar, fast and slightly negative grade, we actually had to sit bolt upright and feather the brakes to avoid overtaking a similarly-sized rider that was well up the road and clearly pedaling like mad. But despite Zipp's claims, the rims still don't dissipate heat as well as we'd like, and certainly still not as well as an aluminum hoop. Say what you will about the debated effects of wheel weight on overall acceleration - we know it's a small percentage of the total bike-plus-rider mass - but it's still a noticeable difference nonetheless.

A fast road wheel is only as good as its ability to maintain speed and traction in a variety of conditions. Pros Consistent speed in wind Maintains structural integrity under heat Accelerates quickly Reliable and stiff handling Cons Can get significant heat buildup when braking, which can affect reliability of brakes The braking tends to be touchy and may squeal in wet conditions.

As you can see in the illustration below, they are very wide at the tyre Even with stainless steel shafts, they're also fantastically light at just 74g for the pair. The rear hub features tall flanges to help transmit power to the rim. Straight after both of the tyres blew off the rim at exactly the same time. The problems still came back though. So much that the tyre has rubbed right through the paint on my rear chainstay 4. If flat land speed is what you're after, these are clearly a good way to get it. Even so, we experienced faster-than-anticipated heat build-up on our test set during long descents and panic stops plus ear-piercing brake howling once things got hot. This test is done in still air to ensure the minimal amount of convective cooling possible and we still manage to shed over degrees in a single revolution in still air. Zipp's new Carbon Clinchers are ultra-fast at speed and remarkably easy to handle in strong crosswinds. The new Firecrest rim profile features an unusually blunt nose that helps lend the wheels remarkable stability in swirling gusts.