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GT
Helion Carbon Pro Complete Mountain Bike - 2015

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Raising Hell-ion.

When some of the best mountain bike engineers in the world meets some of the best mountain bike materials in the world, you get podium-topping machines like the all-new 2015 GT Helion Pro Carbon Complete Mountain Bike, and you a get a bike that has put the rest of the industry on high alert.


The Helion Pro's frame benefits from GT's recent years of investing enormously in developing the most advanced applications of carbon fiber to the world of mountain biking. While they have a few different versions of the specific carbon types they've developed, the Helion Pro utilizes only the lightest and strongest, called FOC Ultra. FOC stands for Force Optimized Construction, which is a vague way of describing GT's complicated proprietary process of allocating carbon to various areas of the frame and aligning its fibers within fractions of millimeters of precision to achieve maximum stiffness where the frame needs it, and shed all excessive weight at the same time. The result is a chassis that has only been on the market for a few months, but has already won numerous awards for its outstanding overall performance, and it's causing a lot of frustration among GT's competitors.


Helping out that performance is GT's revolutionary Independent Drivetrain suspension platform. The idea of isolating the drivetrain so that it's not affected by suspension movement is nothing new, but GT's approach is, and it works really, really well. The crankset and the rest of the drivetrain make their home entirely on the rear triangle, unlike many designs that put the crank on the mainframe and the rest of the drivetrain parts on the rear triangle. The problem with this is suspension compression that occurs with pedal force, robbing you of efficiency. It's simpler to build bikes this way — indeed, the I.D. system on the Helion is complicated to look at, but it works. Sprinting or out-of-saddle climbing is rewarded with hardtail-like efficiency, not dependent on a shock's damping, yet it's incredibly compliant, and the front half of the bike remains extremely stable. One spin and you'll see why we love it.


Please note: the 2015 GT Helion Pro Carbon Complete Bike does not come with pedals.


Frame Material
FOC Ultra Carbon
Rear Shock
FOX Racing Shox FLOAT CTD Remote BV
Rear Travel
110 mm
Fork
FOX 32 FLOAT 27.5 CTD Remote FIT
Front Travel
110 mm
Headset
Orbit C-40-ACB
Shifters
Shimano Deore XT, SL-M780, Rapid Fire, Right Side Only
Front Derailleur
e.thirteen XCX+ High Direct Mount
Rear Derailleur
Shimano Deore XT Shadow Plus, Direct Mount, RD-M786-D, GS Cage
Crankset
RaceFace Turbine Basic, 32T Narrow Wide
Bottom Bracket
Race Face
Cassette
Shimano Deore XT, CS-M771-10, 10-Speed, 11-36T
Chain
KMC X10
Rotors
180 mm Shimano Deore XT, BL-M785
Handlebar
Race Face Turbine 35
Handlebar Rise
10 mm
Handlebar Width
740 mm
Grips
GT Statement Single Lock-on Grips
Stem
Race Face Turbine 35
Stem Length
80 mm
Saddle
fizik Tundra2, Manganese Rail
Seatpost
Race Face Turbine, 31.6x375mm
Seat Collar
All Terra Alloy, 34.9mm
Hubs
DT Swiss 350, Centerlock, 15x100mm Thru Axle, DT Swiss 350, Centerlock, 12x142mm Thru Axle
Tires
Continental X-King
Tire Size
27.5 in x 2.2 in
Recommended Use
cross country
Manufacturer Warranty
lifetime on frame

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