Pro bike: Mark Weir’s WTB-Fox-Santa Cruz Nomad Carbon

Downieville downhill champ's race bike

After blazing the downhill portion of last month's Downieville Classic on his Santa Cruz Nomad Carbon and finishing nine seconds faster than his closest rival, Mark Weir climbed onto the top step of the podium wearing a shiny boxer’s robe embroidered with the words, ‘Can’t be beat – Champ – Won’t be beat.”

Weir didn’t race at Downieville – an event he helped put on the map – in 2008 or 2009, but he came back this year with a vengeance, finishing sixth in the cross-country race, on a heavier bike with much more suspension travel than his competitors, as well as winning the downhill.

This is a man who revels in the concept of all-mountain racing and paved the way for the likes of Ross Schnell and Nathan Riddle to make mountain bike careers somewhere between the worlds of traditional cross-country and downhill racing.

The Downieville downhill champ

Weir’s Nomad Carbon suits his style of muscling up a climb, only to go as fast as possible once the trail turns down. Not only does his size medium bike have lots of travel – 6.3in (160mm) front and rear) – but he chooses to equip it with a heavy-duty, downhill flavoured spec.

At Downieville this consisted of a a coil over Fox RC4 shock with titanium spring, 40-tooth single chainring and MRP G2 chain guide, WTB Wolverine 2.2in TCS FR dual-ply reinforced tyres, Gravity Dropper Turbo remote adjust seatpost and extra wide 740mm PRO Vanderham alloy downhill bars.

The one place where Weir did save weight was with his new, custom WTB Stryker wheels. Though WTB do make an all-mountain version, he went with the weight savings afforded by the sub-1,500g cross-country model.

Weir had a 20mm through-axle front hub laced to the Stryker cross-country rim; this configuration will not be available to the public

As an example of Weir’s preference for downhill performance, he had always eschewed Shimano's top-end XTR brakes in favour of their ultra-powerful four-piston Saint units. That was until he tried the new XTR Trail groupset.

“With a 180mm rotor the new brakes have the same power as Saint with a 160mm, but with way less weight,” said Weir. “The short lever really puts it in the wheel house. I’ve got shorter fingers and I’ve had no issues staying on them. I’ve had no pump with the brakes; no issues at all.”

The new XTR brakes weren’t the only items that Weir was raving about after his downhill win. He also made mention of the new drivetrain’s shifting efficiency and chain management capabilities.

Shimano's new XTR M980 rear derailleur and 11-36T cassette

“The new Shimano is clean,” he said. “The shifting is much more positive; it instantly drops down each gear. Since I started racing those last two gears (the 13 and 11T cogs) have always been useless to me. It doesn’t matter if it’s Shimano or SRAM, it burbles around down there. This new stuff slaps in hard and stays there. It’s like downshifting a good car, you know you’re in the gear.”

Weir would like it if Downieville was slightly more skewed toward the downhill portion of the race. As it stands, the overall all-mountain winner is decided by overall time, and even with the downhill win, Weir found himself close to eight-and-a-half minutes away from Giant Factory Team's Carl Decker, who raced a 29in-wheeled Giant Anthem X cross-country bike.

Weir equipped his bike with a single 40T Shimano Saint chainring and MRP G2 chainguide

“The cross-country was a blowout by super horsepower,” he said “It should probably be based on a point schedule. He [Decker] won the all-mountain on the climb. It was a great ride and he’s a great rider, but the margin was huge. You shouldn’t just have to ride the downhill; it takes the race out of the race.”

Complete bike specifications:

  • Frame:  Santa Cruz Nomad Carbon, 160mm travel, VPP suspension design
  • Rear Shock: Fox DHX RC4 with 350lb titanium coil spring
  • Fork:  Fox 36 Float 160 RLC, 160mm travel, 47psi positive air pressure
  • Headset: Cane Creek custom tapered
  • Stem: PRO FRS, 70mm
  • Handlebars: PRO Vanderham, 740mm
  • Grips: WTB Technical Trail
  • Front brake: Shimano XTR M980 Trail w/Ice Tech 180mm rotor
  • Rear brake: Shimano XTR M980 Trail w/Ice Tech 160mm rotor
  • Chain Guide: MRP G2
  • Rear derailleur: Shimano XTR M980
  • Shifter: Shimano XTR M980
  • Brake levers: Shimano XTR M980 Trail
  • Cassette: Shimano XTR M980, 11-36T
  • Chain: Shimano XTR M980
  • Crankset: Shimano XTR M980 w/Saint 40T single ring
  • Bottom bracket: Shimano XTR M980
  • Pedals: Shimano XTR M970
  • Wheelset: WTB Stryker Cross-Country
  • Front tyre: WTB Wolverine 2.2 FR TCS, 27.5psi
  • Rear tyre: WTB Wolverine 2.2 FR TCS, 28.5psi
  • Saddle: WTB Valcon Team Carbon
  • Seatpost: Gravity Dropper Turbo
  • Computer: Garmin Edge 705

Critical measurements:

  • Rider's height: 176.5cm/5ft 9.5in
  • Rider's weight: 74.4kg/164lb
  • Saddle height from BB, c-t: 72cm
  • Seat tube length, c-t: 43.2cm
  • Saddle-to-bar drop: 3cm (seat post extended)
  • Head tube length: 10.9cm
  • Top tube length: 57.8cm
  • Total bicycle weight: 13.15kg/29lb (with C02 inflator)

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