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Niner Air 9 2 Star SLX Bike

Item #: BI226P14
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USD$2,124.99 15% off USD$2,499.00 msrp
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Please Note: Photo is for illustration purposes only. You will be shipped a bike with the components listed below.

Niner Air 9 2 Star SLX Bike

The Air 9 is Niners fast, light, geared-only alloy racing hardtail. This upgraded version integrates hydroformed tubing throughout. More than a cosmetic feature, hydroforming allows Niner to shape tubes and optimize strength and stiffness in key areas, giving the ability to create beautifully tuned frames with precise ride characteristics. You will find hydroforming in the toptube, downtube, headtube, chainstays and seatstays.

Because of the larger welding area created by the new tapered headtube, we are able to include a massive hydroformed downtube as well as a significantly larger diameter toptube, contributing to a much stronger frame. Chainstays, seat tube and seatstays also benefit from hydroforming via controlled wall thicknesses and enhanced butting profiles. This translates to a rear triangle that is tuned for stiffness, strength and vertical compliance – in other words, ideal ride feel.

The Air 9 features a tapered headtube with an integrated headset. By allowing for the use of the newest generation of 1.5” tapered steerer suspension forks and integrated headset, Niner create the stiffest front end possible – leading to amazing steering precision as you carve a corner and descend toward the finish line, with the same stack height as their original Air 9 model.

The Niner Air 9 SLX Bike features an impressive component spec that is ideal for those looking to get serious about mountain biking. RockShox is well known within the industry for producing high-end suspension components that are easy to setup and use. Therefore, it was only logical that Niner chose to incorporate the RockShox Recon Gold TK fork with one of their leading cross-country race frame. The RockShox Recon Gold TK fork features 100mm of smooth suspension travel for eating up the trail. The 15mm axle and tapered head tube ensure the front end is stiff, helping maintain excellent steering, especially when riding winding single track or switchbacks. SLX is the introduction to Shimano’s mountain race line. Shimano SLX components are built to be tough and cost effective. The Shimano SLX 10 speed drivetrain provides smooth and accurate every time; there will be no sloppy shifts with Shimano SLX. Niner’s own alloy wheelset are heavy-duty yet lightweight, making a wheelset that will take a beating without weighing you down. A Niner signature cockpit rounds out this build, making it the perfect blend of quality, weight, strength, and speed.

  • 73mm PF30 BB width
  • PF30 BB adaptable to threaded via adapters
  • 31.6mm seat post size, 400mm length recommended
  • 34.9mm front derailleur, high mount, top pull
  • 34.9mm seat collar size
  • 1.125” – 1.5” tapered head tube with integrated (Campy style) headset. Cane Creek standard description: IS42/28.6|IS52/40
  • Small frame has one bottle mount inside the front triangle. Medium, Large, and XL frames have two bottle mounts inside the front triangle.
  • Replaceable derailleur hanger
  • 135mm QR rear spacing
  • Can fit up to a 2.4” tire (tire size varies by brand, some tires may not fit)
  • Compatible with standard 3x chainring systems
  • SRAM recommended 2x chainrings: 34T, Q-Factor: 168mm
  • Shimano XT recommended 2x chainrings: 28/40T or lower
  • Shimano XTR 2x is NOT recommended. Both versions (40T/48.8mm chainline and 38T/46.6mm chainline) position the large chainring in a way that it may contact the frame.
Frame Air 9
Fork RockShox Recon Gold TK Solo Air, 100mm travel, 15mm thru-axle
Wheelset Niner Alloy, 15mm front / 135mm x QR rear
Tires Schwalbe Racing Ralph Performance, 29 x 2.25"
Brakes Shimano Deore M615 hydraulic disc brakes, 180/160mm rotors
Shifters Shimano SLX M670, 2/3x10, I-Spec compatible
Front Derailleur Shimano Deore M611
Rear Derailleur Shimano SLX M675 SGS Long Cage, 10-speed, Shadow Plus
Crankset Shimano Deore M612, 40/30/22T
Bottom Bracket Shimano BB70
Cassette Shimano HG62, 11-36T
Chain Shimano HG54, 10-speed
Handlebar Niner Flat Top Alloy, 710mm
Stem Niner Alloy stem
Grips Niner Grrrips
Saddle WTB Volt Sport, Niner Graphic
Seatpost Niner Alloy seat post, 400mm

Geometry (100mm fork)
Size Small Medium Large Extra Large
Effective Top Tube Length 590mm 607mm 626mm 645mm
Seat Tube Length 394mm 419mm 483mm 533mm
Head Tube Length 105mm 110mm 125mm 145mm
Head Angle 70° 71.1° 71° 71°
Seat Angle 73° 73° 73° 73°
BB Drop 54mm 54mm 54mm 54mm
Front Center 655mm 660mm 680mm 700mm
Wheel Base 1088mm 1094mm 1114mm 1134mm
Chain Stay Length 439mm 439mm 439mm 439mm
Reach 404mm 418mm 433mm 446mm
Stack 608mm 617mm 631mm 651mm
Standover Height 724mm 744mm 796mm 837mm
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Free Shipping Offer

Get free Standard Shipping with your $50 purchase today! Just choose Standard Shipping during checkout.

Please note this offer is only available to physical shipping addresses in the 48 continental United States (no PO Boxes), and oversize charges still apply on some heavy/large items.