Niner Jet 9 – First Ride review

Full-suss 29er to convince the cynics

Our rating 
4.3 out of 5 star rating 4.3
GBP £3,500.00 RRP | USD $4,856.95

Our review

A superbly sorted full-suss 29er that makes the trail feel easier than riding a similar 26er
Skip to view product specifications

A quick glance at California-based Niner Bikes’ website could convince even the most stubborn 29er cynic that this big-wheelers-only brand might have something special going on, and not just with its hardtails either. The Jet 9 is the first 29er full-susser that’s won us over. In fact, it’s one of the best do-everything trail bikes we’ve tested for a while.

Advertisement MPU reviews

Ride & handling: Comfortable, confident and controlled

Some people claim that the best 29ers are faster than similar 26ers. Our opinion, confirmed by the superbly smooth ride rhythm of the Jet, is that while 29ers carry speed through bumpy sections of trail better, fit and skilled riders don’t go any faster overall on a given circuit. 

Big wheels are slower in acceleration but smoother rolling once up to speed, which for these riders seem to cancel each other out. For mortals, the smoother rolling combines with better traction and stability to increase confidence. This can make riding faster in places. 

The well controlled suspension emphasises this, making the Jet 9 the most comfortable, confident short-travel susser we’ve tested. It’s equally at ease on ups, downs and technical singletrack, and with lighter kit could moonlight as a competent race/marathon bike.

Niner jet 9: niner jet 9

Frame: Sturdy chassis with sorted geometry and no obvious bob

Available in Kermit Green, Vana White or Anodised Liquorice, the Jet 9 has just over 3in of virtual pivot, dual rocker suspension travel via Niner’s own CVA (Constantly Varying Arc) design. The floating-out-front pivot point ensures an active suspension feel without any obvious pedal- or weight-activated bob.

The system’s mechanics sit low on the bike, emphasising the low centre of gravity that characterises 29ers due to the bottom bracket axle being lower than the wheel axles. Geometry is the best we’ve come across on a full-suss 29er, too.

Limited tyre clearance is not an issue as a kinked seat tube and skeletal sub-frame let the mud disperse. Sturdy pivot bearings support lateral loads well and stop flexing, and there are enough tube reinforcements to give you maximum confidence when riding hard.

Advertisement MPU reviews

Equipment: Choose your own kit, or plump for £4k complete bike

UK importers Jungle can supply a Fox F100 forked bike with SRAM X.O/X.9 drivetrain and Avid Juicy 7 brakes for £3,999, but a lot of riders will probably go for a frame alone. Dealers will give you a price on any build kit you like.

Niner’s cva dual rocker system is active but bob-free: niner’s cva dual rocker system is active but bob-free

Product Specifications


Name Name, 0, 10, Name, Jet 9 (09)
Brand Brand, 0, 20, Brand, Niner

Available Colours Available Colours, 2, 0, Available Colours, Black Green White
Available Sizes Available Sizes, 2, 0, Available Sizes, L M S XL
Brakes Brakes, 2, 0, Brakes, Avid Elixir
Cranks Cranks, 2, 0, Cranks, Truvativ Noir
Fork Fork, 2, 0, Fork, Rock Shox Reba 29er, 80mm travel
Frame Material Frame Material, 2, 0, Frame Material, 6061 alu with CVA suspension, 80mm
Front Derailleur Front Derailleur, 2, 0, Front Derailleur, Shimano Deore
Front Tyre Front Tyre, 2, 0, Front Tyre, Prowler MX Race
Front Tyre Size Front Tyre Size, 2, 0, Front Tyre Size, 29x2.3
Head Angle Head Angle, 2, 0, Head Angle, 72
Rear Derailleur Rear Derailleur, 2, 0, Rear Derailleur, SRAM X.0
Rear Tyre Rear Tyre, 2, 0, Rear Tyre, Nano Raptor
Rear Tyre Size Rear Tyre Size, 2, 0, Rear Tyre Size, 29x2.3
Rims Rims, 2, 0, Rims, WTB SpeedDisc
Seat Angle Seat Angle, 2, 0, Seat Angle, 74
Shifters Shifters, 2, 0, Shifters, SRAM X.0
Wheelset Wheelset, 2, 0, Wheelset, SpeedDisc All Mtn
Year Year, 2, 0, Year, 2009
Weight (lb) Weight (lb), 2, 0, Weight (lb), 27.6
Bottom Bracket Height (in) Bottom Bracket Height (in), 2, 0, Bottom Bracket Height (in), 13.3
Chainstays (in) Chainstays (in), 2, 0, Chainstays (in), 17.8
Seat Tube (in) Seat Tube (in), 2, 0, Seat Tube (in), 20
Top Tube (in) Top Tube (in), 2, 0, Top Tube (in), 24.5
Wheelbase (in) Wheelbase (in), 2, 0, Wheelbase (in), 44