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Pro bike: Lars Boom's Specialized S-Works Tarmac

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Lars Boom’s Specialized S-Works Tarmac

Lars Boom’s Specialized S-Works Tarmac (Image credit: David Rome / Immediate Media)
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Lars Boom will make his Astana debut at the Tour Down Under

Lars Boom will make his Astana debut at the Tour Down Under (Image credit: Tim de Waele/TDWSport.com)
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Slightly disappointingly, the Dutch superstar’s name is actually pronounced 'Bom'

Slightly disappointingly, the Dutch superstar’s name is actually pronounced 'Bom' (Image credit: David Rome / Immediate Media)
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The new Specialized S-Works Tarmac has been designed as an all-round road bike, yet borrows aero design cues from the Venge

The new Specialized S-Works Tarmac has been designed as an all-round road bike, yet borrows aero design cues from the Venge (Image credit: David Rome / Immediate Media)
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The new Specialized S-Works Tarmac features a neat integrated seat clamp

The new Specialized S-Works Tarmac features a neat integrated seat clamp (Image credit: David Rome / Immediate Media)
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Rarely seen in the WorldTour, Boom rides 44cm alloy handlebars

Rarely seen in the WorldTour, Boom rides 44cm alloy handlebars (Image credit: David Rome / Immediate Media)
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As a sponsored team, Astana uses the SRM power meter spider with Specialized S-Works cranks. 135 BCD Campagnolo chainrings finish the assembly

As a sponsored team, Astana uses the SRM power meter spider with Specialized S-Works cranks. 135 BCD Campagnolo chainrings finish the assembly (Image credit: David Rome / Immediate Media)
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The Campagnolo Super Record rear derailleur shifts along a 12-29T block

The Campagnolo Super Record rear derailleur shifts along a 12-29T block (Image credit: David Rome / Immediate Media)
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Slippery shapes for the S-Works Tarmac

Slippery shapes for the S-Works Tarmac (Image credit: David Rome / Immediate Media)
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A closer look at the Astana Pro Team paint scheme

A closer look at the Astana Pro Team paint scheme (Image credit: David Rome / Immediate Media)
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Tacx Tao cages keep care of hydration

Tacx Tao cages keep care of hydration (Image credit: David Rome / Immediate Media)
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Astana is the only team in the WorldTour to be rolling on Corima wheels

Astana is the only team in the WorldTour to be rolling on Corima wheels (Image credit: David Rome / Immediate Media)
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Specialized S-Works FACT carbon cranks spin on CeramicSpeed bearings

Specialized S-Works FACT carbon cranks spin on CeramicSpeed bearings (Image credit: David Rome / Immediate Media)
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Despite his height, Boom rides a 56cm frame size. A long 130mm stem and plenty of saddle setback gives him the reach he needs

Despite his height, Boom rides a 56cm frame size. A long 130mm stem and plenty of saddle setback gives him the reach he needs (Image credit: David Rome / Immediate Media)
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First seen on Lars Boom's bike, the stub-nose Specialized Power saddle

First seen on Lars Boom's bike, the stub-nose Specialized Power saddle (Image credit: David Rome / Immediate Media)

This article originally appeared on BikeRadar

Lars Boom is a former cyclocross and time trial world champion (under 23), and consistently proves himself to be a rider to watch. With the classics season approaching, Boom will no doubt be eager to take to the cobbles with the speed and skill that won him the fifth stage of the 2014 Tour de France.

For 2015, and the first time in his professional cycling career, Boom leaves the Dutch Radobank-come-Belkin squad to join the Astana Pro Team, alongside the likes of last year's Tour de France winner Vicenzo Nibali.

Boom joins Astana for 2015

With a new team comes a new bike and with three WorldTour teams on Specialized for 2015, Boom's S-Works Tarmac is undoubtedly the most common bike in the peloton.

Where the Specialized bikes of Etixx-Quickstep and Tinkoff-Saxo are quite similar, the Astana team bikes differentiate themselves with colourful paint, Campagnolo groupsets and Corima wheels. Astana is the only WorldTour team to use Corrima wheels.

As seen at the Tour Down Under in January, Boom's Specialized S-Works Tarmac features a Campagnolo Super Record 11-speed groupset. While electronic groupsets are the most common choice in the WorldTour, the Dutch rider sticks with the mechanical version of the Italian brand's luxurious group.

SRM power meter meets Specialized S-Works cranks

The groupset is not entirely Campagnolo, however – the eagle-eyed among you will have spotted the equally desirable SRM Specialized S-Works crank – a carbon-arm BB30-compatabile crankset that uses a Hirth coupling joint similar to that of Campagnolo's Ultra Torque.

The 53/39T Campagnolo chainrings meet a relatively enormous 12-29T cassette.

These Corima wheels are claimed to weigh 1230g for the pair

Wrapped in Specialized tubulars, the French-made Corima S+ wheels feature 47mm deep carbon rims and use thin and super light Sapim CX-Ray bladed spokes. Sponsored by CeramicSpeed, sealed ceramic bearings feature in the hubs and bottom bracket.

Towering at 1.91m (6ft 3in) and weighing just 72 kg (158.4lb), Boom is certainly of a lanky build. Despite this and his time trial prowess, his cyclocross background still shows in his setup – spot the 44cm handlebar from FSA.

This prototype saddle from Specialized looks to be a new competitor to the nose-less ISM saddles

We reported on the near nose-less Specialized Power saddle earlier this week. The saddle is an usual shape compared to the traditionally shaped saddles on nearly every other rider's bike. This shortened saddle means Boom's setback measurement is an unusually massive 136mm, despite his actual position being rather standard. 

Complete bike specifications
Frame: Specialized S-Works Tarmac – size 56cm
Fork: Specialized S-Works Tarmac carbon
Headset: Tapered sealed
Stem: FSA OS-98, 130mm x -6 degrees
Handlebar: FSA Omega Compact, 44cm (c-c)
Tape: Specialized S-Wrap Roubaix
Front brake: Campagnolo Super Record
Rear brake: Campagnolo Super Record
Brake levers: Campagnolo Super Record
Front derailleur: Campagnolo Super Record
Rear derailleur: Campagnolo Super Record
Shift levers: Campagnolo Super Record
Cassette: Campagnolo Super Record, 12-29T
Chain: Campagnolo Record
Crankset: SRM Specialized S-Works, 175mm, Campagnolo 53/39T chainrings
Bottom bracket: CeramicSpeed
Pedals: Look Keo Blade 2 CroMo
Wheelset: Corima 47mm S+ tubular
Front tyre: Specialized Turbo tubular, 24mm
Rear tyre: Specialized Turbo tubular, 24mm
Saddle: Specialized S-Works Power – prototype model
Seatpost: FSA K-Force SB25
Bottle cages: Tacx Tao (2)
Computer: SRM Power Control 7 (not pictured)
Accessories: Campagnolo chain catcher, ANT+ speed sensor on front wheel

Critical measurements
Rider's height: 1.91m (6ft 3in)
Rider's weight: 72 kg (158.4lb)
Saddle height from BB, c-t: 810mm
Saddle setback: 136mm
Seat tube length (c-t): 501mm
Tip of saddle to center of bar: 660mm
Saddle-to-bar drop: 130mm
Head tube length: 160mm
Top tube length (effective): 565mm
Total bicycle weight: 7.16kg (15.75lb) without SRM computer)