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Niner
Jet 9 Carbon Mountain Bike Frame - 2015

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Mixed media.

The biggest change Niner made to the 2015 Jet 9 Carbon Mountain Bike Frame is that the lightweight, stiff alloy used only in the previous iteration's rear suspension links is now used throughout the back end. This mixed-media design uses a carbon front triangle to put the race-proven geometry of the Jet 9 in the hands of more cyclists while keeping the focus on stiffness, an attribute further boosted by its 12 x 142mm thru axle. The cumulatively stiffer ride maintains carbon's efficiency, tracks more precisely over terrain, and protects the oversized cartridge bearings of the suspension. Pivot points aren't designed to handle torsional and lateral flex, and a stiffer overall system keeps things moving as they should.


Other than that back end boost, much of the Jet 9 Carbon resembles the previous model. It shares a carbon monocoque main triangle and many of the RDO's features, including the PF30 PressFit bottom bracket, cleanly routed internal cables, and relatively stubby chainstays. Most importantly though, they share the same eager 29er geometry.


While the industry-wide love of 29ers has sent some manufacturers into R&D purgatory in order to find a solution to full suspension/29er compatibility issues, Niner has been sitting pretty for some time with its 100 millimeters of CVA travel. The CVA suspension's lower link sits below the bottom bracket, which puts bike's virtual instant center ahead of the drivetrain and effectively isolates the drivetrain from the rear triangle. When you press on the pedals, nothing's lost to compressing the suspension, and you won't suffer kickback from chainstay growth when taking advantage of the 29er's ability to push on through rock gardens.


Adding to CVA's trail appeal is a low ratio of shock stroke to suspension movement. This decreases the amount of preload needed, which translates to smooth, effective damping and less drag on the shock seals. For 2015, Niner trusts its CVA design to RockShox with the Monarch RT3 rear shock, whose three distinct damping settings (open, pedal, and lock) let you adjust the bike's platform as required by trail conditions


Frame Material
[front triangle] carbon fiber, [rear triangle] alloy
Suspension
CVA
Wheel Size
29 in
Rear Shock
Rock Shox Monarch RT
Rear Travel
100 mm
Head Tube Diameter
1-1/8 - 1-1/2in tapered
Bottom Bracket Type
PF30
Cable Routing
internal
Front Derailleur Mount
low direct-mount
Brake Type
disc
Seatpost Diameter
31.6 mm
Seat Collar
34.9 mm
Rear Axle
12 x 142mm
Recommended Use
mountain bike, cross country
Manufacturer Warranty
2 years on frame

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