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Niner Air 9 Custom Bike

Item #: BI250P00
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Niner Air 9 Custom Bike

The Air 9 is Niner’s alloy racing hardtail, designed to be fast and light. Constructed from Easton’s GX2 Scandium alloy, the Air 9 is XC light, without compromising stiffness or durability. It also features S-bend chainstays and seatstays for increased mud and heel clearance. The 29” wheel, from which Niner takes their name, is favored for XC riding due to its excellent rolling efficiency and improved angle of attack due to its larger size. This translate to a smoother, more efficient ride that is exactly what you need when doing a grueling climb or endless miles of rolling single track. This custom build from Jenson USA uses a Fox Float 29 to soften up the ride and combines quality components from Shimano, SRAM, and Race Face to create a bike that is well suited for hard XC riding and can even handle some all- mountain as well.

Niner Air 9 Custom Bike Features

  • Easton GX2 Scandium tubeset
  • 1 1/8" head tube (pressfit type headset)
  • 73mm bottom bracket shell
  • Optimized for 80 to 100mm suspension forks
  • Disc brake only
  • Standard QR front and rear
  • 34.9mm Top Swing, Top Pull front derailleur
  • 31.6mm seatpost, 34.9mm seatpost collar
  • Weight: 28.5 lb (size Large, w/o pedals)
SPECIFICATIONS
Frame Niner Air 9 Scandium frame
Fork Fox Float 29, 9mm QR
Wheelset XLC Inverno 29"
Tires CST Caballero, 29" x 2.25"
Brakes Avid BB7 mechanical disc brakes, 160mm
Shifters Shimano LX, 3x9
Front Derailleur SRAM X5
Rear Derailleur Shimano LX
Crankset Race Face Ride, 44/32/22T
Bottom Bracket Race Face X-Type Race XC
Cassette SRAM PG950, 11-34T
Handlebar Race Face Ride
Stem Race Face Ride
Saddle WTB Speed 5
Seatpost Easton EA30, 31.6mm

Note: Components are subject to change without notice.

Geometry (80mm fork)
Size Small Medium Large Extra Large
Effective Top Tube Length 586mm 603mm 622mm 641mm
Seat Tube Length 393mm 419mm 469mm 533mm
Head Tube Length 80mm 90mm 105mm 120mm
Head Angle 71.5° 72° 72° 72°
Seat Angle 74° 74° 74° 74°
BB Drop 60mm 60mm 60mm 60mm
Front Center 644mm 655mm 675mm 694mm
Wheel Base 1082mm 1093mm 1113mm 1133mm
Chain Stay Length 445mm 445mm 445mm 445mm
Standover Height 714mm 735mm 777mm 828mm
Height Recommendation 5"3" - 5'9" (1.6 - 1.75m) 5'8" - 6'0" (1.73 - 1.83m) 5'11" - 6'3" (1.8 - 1.91m) 6'3" - 6'7" (1.91 - 2.01m)


Geometry (100mm fork)
Size Small Medium Large Extra Large
Effective Top Tube Length 589mm 606mm 625mm 644mm
Seat Tube Length 394mm 419mm 483mm 533mm
Head Tube Length 105mm 110mm 125mm 145mm
Head Angle 70.5° 71° 71° 71°
Seat Angle 73° 73° 73° 73°
BB Drop 52mm 52mm 52mm 52mm
Front Center 648mm 660mm 679mm 699mm
Wheel Base 1088mm 1100mm 1119mm 1139mm
Chain Stay Length 445mm 445mm 445mm 445mm
Standover Height 719mm 740mm 783mm 835mm
Height Recommendation 5"3" - 5'9" (1.6 - 1.75m) 5'8" - 6'0" (1.73 - 1.83m) 5'11" - 6'3" (1.8 - 1.91m) 6'3" - 6'7" (1.91 - 2.01m)

REVIEW SNAPSHOT®

by PowerReviews
Niner Air 9 Custom Bike
 
4.2

(based on 6 reviews)

Ratings Distribution

  • 5 Stars

     

    (3)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (0)

83%

of respondents would recommend this to a friend.

Reviewed by 6 customers

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Displaying reviews 1-6

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(1 of 1 customers found this review helpful)

 
5.0

Fun bike

By Wheel builder

from Louisville ky

About Me Avid Cyclist

Verified Buyer

Pros

  • Versatile

Cons

    Best Uses

    • Mountain Biking

    Comments about Niner Air 9 Custom Bike:

    This is a fun bike. You are buying the frame and fork. All of the other parts are the cheapest possible except the brakes. View it as a kit that you get to ride and upgrade as parts go on sale, this is a fantastic deal. My other bikes are a yeti asr5 carbon, Santa Cruz nickel, Santa Cruz jackal, a rigid trek 29er single speed, and several road bikes. This is a fun addition and at a great price. I am a fifty year old Clydesdale riding all out for fun so keep that in mind.

    • Cycling Style:
    • Speed Oriented
    • Was this a gift?:
    • No
     
    5.0

    Niner is the way to go.

    By tracker

    from OK

    Verified Reviewer

    Comments about Niner Air 9 Custom Bike:

    Started with the one9, but due to a change in terrain I decided to go back to gears. This bike has everything you need and nothing you dont. Love the 29in wheels, roll fast and over anything. You can't go wrong with niner.

     
    5.0

    Great Bike

    By Coach

    from Murrieta, CA

    Verified Reviewer

    Comments about Niner Air 9 Custom Bike:

    I have used this bike quite a few times since I bought it and it works flawlessly. I love the 29 inch wheel, you can roll over anything. Great looking bike too.

     
    4.0

    Great bike, great price

    By Matt

    from Tahoe

    Verified Buyer

    Pros

    • Fun to Ride
    • Great looking
    • Light
    • Responsive

    Cons

    • none at this time

    Best Uses

    • Cross country
    • Trail use

    Comments about Niner Air 9 Custom Bike:

    Bought this bike based on the recommendation of a friend and I couldn't be happier. It is a great bike, especially for the money.

    I just started mountain biking with friends this spring and I've been borrowing different bikes trying to figure out what I wanted in my own bike before laying out the $$$ for one. I'm not sure that my experiences will be very useful to other purchasers since I am a relative noob at mountain biking and the bikes I rode before were not the best (or at least not necessarily set up in the best way for me), but I find the Air9 to be very responsive and it just seems to glide over rough terrain. I think it takes sharp cutbacks very well and it just feels powerful once I get moving. I really enjoy this bike in the conditions I've ridden so far. The tires are great in sandy/rocky terrain, sand-covered hardpack, high desert single track but really sluggish on pavement (that's probably not surprising but I thought it might be worth mentioning that it just feels like it sticks to pavement). I haven't had a chance to test it in wetter conditions but I'm looking forward to it.

    The raw scandium paint job looks great.

    The stock grips were not comfortable and moreover one of them continually twisted around the handlebar. A bit sketchy for me, always wondering if it was going to twist off while I was headed downhill. Replaced them with Odi Rogues which made a huge difference for me.

    (1 of 3 customers found this review helpful)

     
    2.0

    Pro Bike Build BS

    By Calves of Belleville

    from Colorado

    Verified Reviewer

    Pros

    • Big Wheels

    Cons

      Best Uses

        Comments about Niner Air 9 Custom Bike:

        Ugly Welds: The frame welds are not pretty. Looks like they were placed by a blind man on a Friday afternoon.Pro Build BS: The bike wasn't even close to tuned. Front and rear derailers are way off. Brakes rub. Not what you would hope with a brand spanken new bike, especially when it took nearly (2) weeks to deliver.Seat Post: I spoke to a rep at Jenson before purchasing to see if I was getting the right size. Turns out the guy I was talking with had almost the exact same build as me so I took his advice. The frame was ok, but the seat post was way too short. It felt like I was riding a clown bike.Grips: OK, I know Jenson is trying to save some money on this build but foam rubber handle bar grips? Really?

        (3 of 3 customers found this review helpful)

         
        4.0

        Great bike, arrived with some damage

        By Freefix

        from Wyoming

        Verified Buyer

        Pros

        • Fast
        • Light

        Cons

        • Very long wheel base

        Best Uses

        • Mtb xc

        Comments about Niner Air 9 Custom Bike:

        Great bike that rides really well, high bottom bracket and massive wheels gave me a new level of confidence in technical terrain. The wheel base is much longer than any other bike I own and I'm still getting used to how the back wheel tracks.

        Bike arrived with some bent pieces in the front disc brake and apparently a bent piece on the rear disc break as well. Couldn't fix these at home and when I brought them to the shop was told there was no way to adjust the front brake such that the disc did not rub as some of the internal pieces were bent. I was charged ~$20 at the shop to have them fixed. Also, the front brake cable was poorly installed and rubs on the front tire causing the housing to be abraided away; currently it's being held on with some extra hair ties. These are really minor issues and overall I think I got a great deal. I would recommend purchaing from Jenson and may do so again in the future. Still, Jenson should not advertise a fully adjusted bike build and then deliver a bike with parts that are not installed correctly and/or broken and bent.

        Displaying reviews 1-6

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        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.