Former cyclo-cross world champion Lars Boom (Rabobank) went to his familiar roots, running a Giant TCX Advanced SL at this year’s Paris-RoubaixJames Huang/BikeRadar
Lars Boom (Rabobank) used an anatomic-bend PRO handlebar for his run at Paris-RoubaixJames Huang/BikeRadar
Lars Boom (Rabobank) used an aluminum bar and a carbon-wrapped stem – both by PRO – for Paris-RoubaixJames Huang/BikeRadar
Lars Boom (Rabobank) opted for the mechanical Dura-Ace version instead of the electronic one. Team officials said he thought the shift buttons were too sensitive on the cobblesJames Huang/BikeRadar
Giant cleverly use the internal routing as a structural element on the tapered head tubeJames Huang/BikeRadar
Lars Boom (Rabobank) gets his own personalized graphic on the head tube of his Giant TCX Advanced SL. ”Boom” means “tree” in Dutch.James Huang/BikeRadar
Rabobank team mechanics added an inline adjuster for the front derailleur cable on Lars Boom’s TCX Advanced SLJames Huang/BikeRadar
Giant integrate no crazy shaping into the TCX Advanced SL top tube, preferring just a wide and gently tapering form that helps maintain a stiff front endJames Huang/BikeRadar
The rectangular MegaDrive down tube on Lars Boom’s (Rabobank) Giant TCX Advanced SL is notably wide at the head tube and only gets wider as it moves toward the bottom bracketJames Huang/BikeRadar
There’s easily a finger’s width of room on all sides of the front tire on Lars Boom’s (Rabobank) Giant TCX Advanced SL, even with a bulbous 30mm casingJames Huang/BikeRadar
A deep-drop hanger eases cable routing on Lars Boom’s (Rabobank) Giant TCX Advanced SLJames Huang/BikeRadar
Rabobank’s Lars Boom ran a cantilever-equipped ‘cross bike to get more clearance, not for mud but for his preferred 30mm-wide tiresJames Huang/BikeRadar
Lars Boom’s brakes are lightweight with compact, low-profile arms, yet still include handy centering adjustmentsJames Huang/BikeRadar
Ball-joint sockets on the pad holders allow for toe-in and tilt adjustmentsJames Huang/BikeRadar
Lars Boom (Rabobank) planted himself on a Fi’zi:k Arione CX saddleJames Huang/BikeRadar
Fi’zi:k offer their sponsored athletes a wide range of options for saddles. Here, Lars Boom (Rabobank) has chosen an Arione CX with a nylon shell and K:ium railsJames Huang/BikeRadar
This year’s parcours could have been covered in slippery, sticky mud but it’s unlikely it would have kept Lars Boom’s (Rabobank) bike from continuing to roll given the massive clearances all aroundJames Huang/BikeRadar
Giant’s PowerCore bottom bracket design features press-fit cups that allow for wider frame tubesJames Huang/BikeRadar
The down tube is offset slightly to the non-driveside in order to make the most of the available real estate on the bottom bracketJames Huang/BikeRadar
Lars Boom (Rabobank) used standard Tacx Tao aluminum cages on his Giant TCX Advanced SLJames Huang/BikeRadar
Lars Boom’s (Rabobank) Shimano Dura-Ace crank, pedals, front derailleur and chain glisten in the sun before getting coated in dust at Paris-RoubaixJames Huang/BikeRadar
Shimano now make matched chainrings in more Paris-Roubaix-friendly ratios, like the 53/44T combination that Lars Boom (Rabobank) used on SundayJames Huang/BikeRadar
The integrated seatmast allows Giant to run the rear brake line directly through the top tubeJames Huang/BikeRadar
The Shimano Dura-Ace rear derailleur is affixed to a replaceable aluminum hanger and an aluminum dropoutJames Huang/BikeRadar
Giant claim that offsetting the seatstays and top tube allows for more flex in the seat tube for increased rider comfort on rough terrainJames Huang/BikeRadar
The custom low-profile arms on Lars Boom’s (Rabobank) Giant TCX Advanced SL offer more braking power and finer modulation than wide-profile modelsJames Huang/BikeRadar
Tight 11-23T spacing on Lars Boom’s (Rabobank) Giant TCX Advanced SL for Paris-RoubaixJames Huang/BikeRadar
Lars Boom’s (Rabobank) tires weren’t marked nor would team officials disclose their maker but they look like Dugast’s Paris-Roubaix tread glued onto 30mm-wide casingsJames Huang/BikeRadar
The Shimano Dura-Ace hubs feature forged aluminum bodies and straight-pull bladed stainless steel spokesJames Huang/BikeRadar
There’s definitely a changing tide in the Paris-Roubaix peloton in regards to carbon fiber wheels. More riders than ever have deemed them durable enough to race on the cobbles – but only if they’re paired with fat tubular tiresJames Huang/BikeRadar
Like many racers at Paris-Roubaix, Lars Boom (Rabobank) had the key secteurs of pave marked on his top tube for referenceJames Huang/BikeRadar
Lars Boom’s (Rabobank) new Giro Aeon helmet hangs off of the stem just before heading out on a short ride the day before Paris-RoubaixJames Huang/BikeRadar
While Lars Boom ran his familiar Giant TCX Advanced SL ‘cross bike, the rest of the Rabobank team used slightly modified versions of the TCR Advanced SL road bikeJames Huang/BikeRadar
Rabobank’s go-to Paris-Roubaix machines – slightly modified Giant TCR Advanced SLs – can handle up to 27mm-wide tires but Lars Boom wanted to go biggerJames Huang/BikeRadar
The modified Giant TCR Advanced SL machines that Rabobank typically use at Paris-Roubaix can already accommodate big 27mm-wide tubular tires for extra cushioning on the pavé. But for former cyclo-cross world champion Lars Boom, bigger is better.
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This year Boom instead decided to use his familiar Giant TCX Advanced SL carbon ‘cross bike, which had more than enough room for the even more voluminous 30mm-wide tubulars he wanted to use to help him float across the cobbles.
Team officials wouldn’t comment on the exact make and model of tire Boom was using – they clearly weren’t sponsor-correct Vittorias – but the tread design and overall appearance suggested to us that they came from Dugast. Team mechanics did say, though, that Boom ran inflation pressures of just 72psi.
Armed with the bigger tires’ extra cushioning, Boom also passed over the traditional box-section aluminum tubular wheels of his teammates in favor of Shimano’s now discontinued 24mm-deep Dura-Ace carbon tubulars. As a result, his bike ended up being a full 500g lighter than other Rabobank bikes with an actual weight as pictured here of 7.39kg (16.29lb) – definitely more in keeping with some of the lighter Paris-Roubaix machines we’ve profiled this year.
Lars boom’s (rabobank) tires weren’t marked nor would team officials disclose their maker but they look like dugast’s paris-roubaix tread glued onto 30mm-wide casings: lars boom’s (rabobank) tires weren’t marked nor would team officials disclose their maker but they look like dugast’s paris-roubaix tread glued onto 30mm-wide casingsJames Huang/BikeRadar
Lars Boom’s tires weren’t marked nor would team officials disclose their maker but they look like Dugast’s Paris-Roubaix tread glued onto 30mm-wide casings
Like a few other Shimano-sponsored riders who run Dura-Ace Di2 on their everyday race machines, Boom switched to the mechanical version for Paris-Roubaix despite the system’s increased susceptibility to housing contamination and longer shift lever throws. According to team mechanics, Boom felt that Di2’s super-short button throws were too sensitive when his fingers were bouncing around on the pavé and didn’t want to run the risk of a mis-shift during the race.
Typical Paris-Roubaix tweaks to the otherwise standard Dura-Ace 7900 group include 53/44T gearing (which Shimano now offer in matched sets to retain the stock setup’s superb shift performance) and a tight-ratio 11-23T cassette the better suit the flat parcours. Noteworthy is the fact that unlike many other racers that day, Boom went without a chain watcher.
Tight 11-23t spacing on lars boom’s (rabobank) giant tcx advanced sl for paris-roubaix: tight 11-23t spacing on lars boom’s (rabobank) giant tcx advanced sl for paris-roubaixJames Huang/BikeRadar
Tight 11-23T spacing on Boom’s Giant TCX Advanced SL for Paris-Roubaix
Shimano don’t make Dura-Ace cantilever brakes, so Giant and Rabobank instead commissioned lightweight aluminum brakes – anodized in team orange and blue colors – from one of their prototype suppliers in Taiwan. “These are new prototypes [done by] the same guy who makes the time trial brakes for us (Giant and Rabobank), the “standard” cross brakes for the Rabo team, and some other parts and projects with us,” said team technical director Andy Wollny. “It’s a small Taiwanese company – no big name, but very flexible and always able to help me to make special parts in a short time.”
Boom’s brakes feature simple dual-aluminum plate construction with no frills like spring covers or fancy hardware to keep the weight low. Ball-joint cartridge holders and slotted arms allow for proper pad placement, though, and tidy set screws are on hand for easy and precise centering. The low-profile configuration produces more power than the wide-profile brakes Boom usually uses for ‘cross.
There’s easily a finger’s width of room on all sides of the front tire on lars boom’s (rabobank) giant tcx advanced sl, even with a bulbous 30mm casing: there’s easily a finger’s width of room on all sides of the front tire on lars boom’s (rabobank) giant tcx advanced sl, even with a bulbous 30mm casingJames Huang/BikeRadar
There’s easily a finger’s width of room on all sides of the front tire on Boom’s Giant TCX Advanced SL, even with a bulbous 30mm casing
Boom’s bike is finished with PRO’s Vibe carbon-wrapped stem and PLT Anatomic aluminum handlebar, Shimano Dura-Ace PD-7810 aluminum-bodied pedals, an FSA headset, a Fi’zi:k Arione CX saddle and a pair of Tacx Tao cages. Boom ultimately finished 12th on the day.
Complete bike specifications
Frame: Giant TCX Advanced SL, size L/56.5cm
Fork: Giant TCX Advanced SL, 1-1/8 to 1-1/4in tapered
Headset: FSA Orbit integrated, 1-1/8 to 1-1/4in tapered
Stem: PRO Vibe, 130 x -6°
Handlebar: PRO PLT Anatomic, 42cm (c-c)
Tape: PRO cork
Front brake: Rabobank custom aluminum cantilever by Giant w/ Shimano carbon-specific pads
