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Illegally light: Wilier's Zero.6 weighs a mere 5.8kg/13lb

Pros can't race this Campy Super Record / HED bike, but you can

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Wilier's Zero.6 is a nod to the frame's weight: 0.68kg

Wilier's Zero.6 is a nod to the frame's weight: 0.68kg (Image credit: Ben Delaney/Immediate Media)
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Love it or hate it: Campy's thumb shifter is polarizing

Love it or hate it: Campy's thumb shifter is polarizing (Image credit: Ben Delaney/Immediate Media)
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Ritchey's SuperLogic bar and stem are super light, at 190g and 125g, respectively

Ritchey's SuperLogic bar and stem are super light, at 190g and 125g, respectively (Image credit: Ben Delaney/Immediate Media)
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Campy's Super Record calipers aren't quite as beefy as Shimano Dura-Ace, in aesthetic or power, but they work quite well

Campy's Super Record calipers aren't quite as beefy as Shimano Dura-Ace, in aesthetic or power, but they work quite well (Image credit: Ben Delaney/Immediate Media)
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For such a light frame, the rear triangle feels reassuringly solid when stomping on the pedals out of the saddle

For such a light frame, the rear triangle feels reassuringly solid when stomping on the pedals out of the saddle (Image credit: Ben Delaney/Immediate Media)
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Whether caused by the cockpit or the frame, I'm not sure, but the front end flexes a bit under heavy torque

Whether caused by the cockpit or the frame, I'm not sure, but the front end flexes a bit under heavy torque (Image credit: Ben Delaney/Immediate Media)
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The derailleur mount on the thin downtube has a little give, but the front shifts well enough

The derailleur mount on the thin downtube has a little give, but the front shifts well enough (Image credit: Ben Delaney/Immediate Media)
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Smooth lines continue from the fork into the downtube

Smooth lines continue from the fork into the downtube (Image credit: Ben Delaney/Immediate Media)
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Internal routing *through* the derailleur hanger? That's uncommon

Internal routing *through* the derailleur hanger? That's uncommon (Image credit: Ben Delaney/Immediate Media)
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Seatstays flow into the top tube, as is the trend these days

Seatstays flow into the top tube, as is the trend these days (Image credit: Ben Delaney/Immediate Media)
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Paint adds weight, but Wilier allows itself a logo on the otherwise bare frame

Paint adds weight, but Wilier allows itself a logo on the otherwise bare frame (Image credit: Ben Delaney/Immediate Media)
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Building bikes for 111 years is a remarkable run

Building bikes for 111 years is a remarkable run (Image credit: Ben Delaney/Immediate Media)
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Campy fans have long exulted in the brand's organic curves and Super Record doesn't disappoint on that score

Campy fans have long exulted in the brand's organic curves and Super Record doesn't disappoint on that score (Image credit: Ben Delaney/Immediate Media)
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Is it anathema to put an Exustar pedal on a Super Record crank? Sorry, Italy

Is it anathema to put an Exustar pedal on a Super Record crank? Sorry, Italy (Image credit: Ben Delaney/Immediate Media)
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A few ultra-high-end component options are available, including this Campagnolo Super Record

A few ultra-high-end component options are available, including this Campagnolo Super Record (Image credit: Ben Delaney/Immediate Media)
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The Wilier Triestina Zero.6 as built weighs 5.8kg / 13lb

The Wilier Triestina Zero.6 as built weighs 5.8kg / 13lb (Image credit: Ben Delaney/Immediate Media)

This article originally appeared on BikeRadar

Professional road racers have been constrained for years by a minimum bike weight limit of 6.8kg/14.99lb. Dressed in Campagnolo Super Record and HED Stinger 3 tubulars, Wilier Triestina's new Zero.6 is a full kilo less than UCI legal.

Wilier's Zero.6 frameset is named after its weight in kilos: 0.68kg. (The Italians round down, evidently.)

It wasn't too long ago that sub-900g was the target for superlight climbing bikes. Well, after Wilier and others got under that, and then under 800g, sub-700g became the quest.

WIlier achieved the new weight target with carbon from Mitsubishi Japan.

Aside from the eyebrow-raising weight, there are some neat details on the frame, like dropouts made in monocoque with the rest of the rear triangle and internal rear derailleur cable routing that pokes out of the back of the derailleur hanger.

Wilier sells the Zero.6 as a frameset in the US and as a variety of high-zoot builds elsewhere.

I got a hold of this Super Record build with HED's 1,189g Stinger 3 wheels, Continental Sprinter tubulars and Ritchey SuperLogic cockpit, and put it on my Feedback Sports scale: 5.8kg / 13lb.

At 185lb / 84kg myself, I am an ironic rider to perch atop such a machine. However, I make for a decent tester of light bikes, I think, because I can suss out what flexes and what doesn't.

In the first few rides, the rear end of the bike felt surprisingly stiff, but the front end of the bike moved under hard torque. It's hard to say whether this was the Superlogic bar and stems flexing, the steerer tube or a combination thereof, but the end result was a far cry from my Shimano PRO cockpit on an older Scott Foil.

I'll be riding this bike more — including with a Campagnolo Shamal Mille that comes on one of the stock builds — and reporting back with a full review soon.

In the meantime, check out the gallery above.