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Roubion Carbon XT Mountain Bike

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Current price: $4,840.00 Original price: $7,449.00
35% off
Color:Blue Steel


GeometryFind your size


Why We Like The Roubion Carbon XT Mountain Bike

Designed to shake up the trail bike category by its roots, the mixed-wheel Roubion lets us saddle up knowing we’ll be more than prepared for anything we come across on dicey trails. With the plow-over-anything confidence of the 29in wheel up front, and the surgically-precise 27.5in wheel in the back, this bike is far more capable than its 150mm of travel might suggest. Like all Julianas, the Roubion’s rear shock is hand-tuned for lighter-weight riders than its Santa Cruz counterpart, the Bronson.

The fourth-generation Roubion has a frame that’s purpose-built to work around a 27.5in and 29in wheel combo, offering a better ride than scrappy mullet conversions that can have undesirable effects on the bike’s geometry and handling. The revised wheels bring the mixed wheel size game into the park and enduro lineup, giving riders a bike that's nimble in the corners but rolls over the chunder all day long. The bike maintains the same 150mm of VPP rear travel as the previous generation, but the suspension has lower anti-squat values to help enhance the bike’s traction and overall smoothness.

This Roubion also sees longer and slacker geometry, but Juliana didn’t go too crazy with it and the bike still has that agility that riders loved about the previous model. Our favorite change is the chainstay length that varies per size, ensuring every size of rider gets the same balanced geometry and fit. The reach and wheelbase are longer and the head tube is slacker, providing more stability during high-speed sections and technical descents. Juliana knows that pedaling prowess matters, so they incorporated a steeper 77.1-degree seat tube angle on a size medium to balance the long and slack geo. Combined with the efficient VPP platform, the bike tackles tough climbs with ease. The geometry is also adjustable via a flip-chip in the linkage, allowing you to tune the handling to suit the trail at hand.

Lucky for all of us, one thing that hasn't changed is Juliana's carbon frames, which is a good thing if you're after the legendary strength and unwavering stiffness of their renowned carbon layups. This particular Roubion benefits from the Carbon C layup, which uses a bit more material than CC frames but still accelerates quickly and offers unflappable poise when pummeling through rough terrain. It's backed by Juliana's excellent lifetime warranty, so you'll have extra peace of mind while riding particularly fast on your favorite stretch of trail and shuttling downhill laps on the mountain pass. Note that the size extra-small Roubion is built with two 27.5in wheels to better suit smaller riders.

*Due to a high demand in the global supply chain and bike industry since the start of the pandemic, material weight and exact components are subject to change. We are working diligently to keep tech specs updated, and any adjustments will be of equal or better spec level. If you have any questions, reach out to a Gearhead by chatting online or calling 1-888-276-7130.


  • Mixed-wheel trail bike with an appetite for the gnar
  • 29in front wheel rolls over techy ledges and rock-rolls with ease
  • 27.5 rear wheel preserves the bike's playful handling and cornering
  • 150mm of VPP rear travel paired with a 160mm Fox 36 fork
  • Updated suspension kinematics for greater traction going up and down
  • Included flip-chip lets you tune your geometry to your preference
  • Carbon C frame offers excellent stiffness and durability
  • Slack head-angle and steep seat-angle for better pedaling & descending
  • Item #JLIC06A
Frame Material
Carbon C
Rear Shock
RockShox Super Deluxe Select+
Rear Travel
Fox 36 Float Performance Elite
Front Travel
Cane Creek 40 IS Integrated
Shimano XT M8100, 12-speed
Rear Derailleur
Shimano XT M8100, 12-speed
Shimano XT M8100
Chainring Sizes
Crank Arm Length
[x-small] 165mm, [small, medium] 170mm
Bottom Bracket
Shimano XT 68/73mm threaded
Shimano XT M8100, 12-speed
Cassette Range
Shimano XT, 12-speed
Shimano XT 8120
Brake Type
hydraulic disc, 4-piston
Shimano XT RT86, Ice Tech
Santa Cruz Carbon
Handlebar Rise
Handlebar Width
Juliana House grip (30mm) or Burgtec Bartender Pro Grip Minaar
Burgtec Enduro MK3
Stem Length
Juliana Primiero Saddle, WTB Volt
RockShox Reverb Stealth, 31.6mm
Seatpost Travel
[x-small] 100mm, [small] 125mm, [medium] 150mm
Race Face ARC Offset 30
DT Swiss 350
Front Axle
110 x 15mm (Boost)
Rear Axle
148 x 12mm (Boost)
Tire Clearance
[rear] 2.6in
[front] Maxxis Minion DHF, 3C, MaxxGrip, EXO, [rear] Maxxis Minion DHR II, 3C, EXO
Tire Size
[front, size small and medium] 29 x 2.5in, [front, size x-small] 27.5 x 2.5in, [rear] 27.5 x 2.4in
not included
downtube protector, chainstay protector, shock fender, shuttle guard
Claimed Weight
trail, bike park, enduro
Manufacturer Warranty
[frame] lifetime

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