Niner Jet 9 Alloy NX1 review

Built for putting the power down but has serious heft

Our rating 
3.0 out of 5 star rating 3.0
£3,000.00 RRP

Our review

Distinctive high traction, high efficiency big wheeler but heavy
Buy if, You want an agile and capable climbing machine and don't mind compromising on weight and out-and-out toughness
Pros: Designed to run either 29in or 27.5 plus wheels; impressively pedal efficient yet high-traction suspension for tenacity on technical climbs
Cons: Frame and components combine to create a hefty overall mass; front end lacks muscle and authority on more taxing trails
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We tested the carbon-fibre RDO version of Niner’s new Jet 9 last year but you can get this full alloy bike for the price of just the RDO frame. It delivers a similarly super-efficient pedalling ride, plus wheel compatibility and the niche brand appeal of the carbon bike.

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With Niner’s own wide 780mm flat bar, 130mm RockShox Yari fork, 29×2.4in front tyre and 445mm reach on our large sample, and a weight just shy of 14.5kg, it’s got a serious trail presence for just 120mm of travel. 

The CVA linkage is unique in that the upper and lower linkages splay apart on their top-quality enduro bearings as chain tension pulls the wheel forward. That means they effectively balance each other out, leaving it stiffer but essentially neutral in terms of what direction it moves in. 

Niner’s own wide 780mm flat bar sits atop a RockShox Yari fork
Niner’s own wide 780mm flat bar sits atop a RockShox Yari fork
Russell Burton

That’s pretty much ideal for delivering power with consistent traction, however random the surface, and despite its weight the NX1 is a very determined technical climber. Back off the power and the suspension is mobile enough to flow over trouble, and it’ll even take a hefty punch from a rock or drop without coughing you over the bars. 

The frame will also accommodate 27.5×3.0in plus tyres if you really want to maximise its trail-smothering traction.

The sturdy RockShox Yari fork sits at a comfortably confident 67.5 degrees, while a short 434mm-long Boost-width back end means it snakes through tighter turns well for a big-wheeled bike. 

There's some notable flex in the swoopy frame when the going gets really brutal
There’s some notable flex in the swoopy frame when the going gets really brutal
Russell Burton

Relatively slim rear stays, long linkages and curved and kinked main tubes with a steep slope down from the short head tube translate into noticeable flex if you start trying to force it through corners harder than it’s comfortable with, though. 

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Reach and wheelbase are also on the short side, which reduces stability when really scything through corners and chunder. The dropper-less NX level spec is definitely below par for the price, too.

Product Specifications

Product

Name Jet 9 Alloy NX1
Brand Niner

Brakes SRAM Level 180/160mm
Cranks SRAM NX1
Fork RockShox Yari RC 130mm
Frame Material Hydroformed alloy
Front Tyre Maxxis Ardent Exo 29x2.4in
Head Angle 67.5
Rear Derailleur SRAM NX1
Rear Shock RockShox Monarch 120mm
Rear Tyre Maxxis Ardent Exo 29x2.25in
Seat Angle 74.5
Shifters SRAM NX1
Weight (kg) 14.4
Wheelset Niner alloy
Frame size tested L