Home Page

Cart, contains 0 items

When autocomplete results are available use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures.
Expert Help
Earn Rewards
  • Just In
  • Learn

Niner
ROS 9 3-Star-X1 Complete Mountain Bike - 2015

Be the first to review

Out of Stock

Don't worry though, we have a lot more Hardtail in stock than that.

Shop Similar Products

For the purists.

For the majority of the last 20 years in mountain biking, the trend in frames has been to incorporate lighter and smarter suspension systems to help smooth out the trails. A dedicated few, however, have stuck by their hardtails, touting lower maintenance and a superior, more natural connection to the trail that translates into greater confidence than feel-robbing rear shocks can ever provide. For hitting big lines and drops, of course, rear suspension has its place, but for those purists, hardtail bikes like the 2015 Niner ROS 9 3-Star X1 Complete Mountain Bike don't just do it well, they do it best.


You'll notice that the ROS 9 looks a lot like the SIR 9 from which it's descended, but the burlier steel tubeset gets stronger welds and is far better equipped to handle bigger forks and wild riding styles. As a result, the ROS frame weighs in at 6 pounds, putting on the heavier side of the hardtail spectrum. But, as anyone who’s ever walked back to the trailhead due to a broken frame can tell you, a little extra weight is well worth the peace of mind, especially when you’re jumping that gnarly double for the first time. Weight and materials aside, a quick glance at the geometry sheet will confirm that the ROS isn’t your average hardtail. Depending on your choice of a 120mm or 140mm fork, you’ll end up with a 68- or 67-degree head angle, respectively. And in the world of 29ers, that's very slack — perfect for going fast. Out back, the chainstays hover around the 16.5-inch mark, with 5mm of fore/aft adjustability courtesy of Niner's BioCentric bottom bracket. That keeps it turning on a dime, and makes full speed manuals a piece of cake. But it doesn't sacrifice stability with its roomy cockpit and low bottom bracket.


Of course, a steroidal hardtail like this needs to be able to host parts that will keep up. That's where, for example, the 44mm head tube comes into play — allowing compatibility with tapered forks. The 31.6mm seat tube fits just about every dropper seatpost on the market, and the stealth routing gives you extra options, too. The dropouts employ a 12x142mm thru axle, enhancing stiffness and security when you're sending it. The bottom bracket shell is oversized, and, as mentioned, includes Niner's BioCentric bottom bracket adapter, which is compatible with 73mm threaded bottom brackets. It's eccentric, so you have both geometry adjustment, and super-simple singlespeed setup options. If you prefer a geared setup, you also have the option of running Niner's CYA adapter, which accommodates all of the latest crank standards, including various oversized spindle options. The maximum chainring size varies depending on the position of the BioCentric EBB insert. At the most rearward position, the Niner recommends running no larger than a 32t chainring, and when in the forward position, it will accept a 38t ring. It’ll clear just about every 2.3in tire on the market, and there's clearance for double and triple chainring cranksets. In other words, at the end of the day, it'll handle virtually any setup that your riding warrants.


If you want to leave the work of picking that setup to the pros, however, then you've come to the right place. For not a lot of dough, the 3-Star X1 Complete build kit loads up the ROS 9 with a parts selection that's both tough and light enough for whatever riding you want to do. The X1 11-speed drivetrain from SRAM brings nearly identical performance and feel to that of its most-expensive XX1 drivetrain, but with only a bit more weight for far less money. Shimano Deore M615 brakes are smooth, powerful, and predictable, which is a great thing, because the RockShox Pike RCT3 Solo Air fork up front will encourage fairly irresponsible speeds thanks to its superb trail-smoothing abilities. Stan's Flow EX wheels wrapped in Schwalbe Nobby Nic tires means tough and capable rolling stock that's ready for virtually any terrain. It's all controlled by you via Niner's proven cockpit parts and complemented by a RockShox Reverb dropper post.


The Niner ROS 9 3-Star X1 Complete Mountain Bike comes in sizes Small, Medium, Large, or X-Large, and in the colors Purple or Forge Grey. Pedals are not included.


Frame Material
4130 chromoly steel
Suspension
front
Fork
RockShox Pike RCT3 Solo Air
Front Travel
140 mm
Headset
Niner
Shifters
SRAM X1
Front Derailleur
n/a
Rear Derailleur
SRAM X1
Crankset
32 t SRAM X1 GXP
Bottom Bracket
Niner CYA
Cassette
10 - 42 t SRAM PG-1130 11-Speed
Chain
SRAM PC-1130
Rotors
[F] 180 mm Shimano, [R] 160 mm Shimano
Handlebar
Niner Flat Top RDO Carbon
Handlebar Width
780 mm
Grips
Niner Grrrips
Stem
Niner Trail Stem
Saddle
Niner Custom
Seatpost
RockShox Reverb
Wheelset
Stan's NoTubes 3.30 ZTR Flow EX
Tires
Schwalbe Nobby Nic Snakeskin TL
Tire Size
2.35 in
Pedals
not included
Recommended Use
all mountain, freeride
Manufacturer Warranty
2 years on frame

What do you think about this product?

View

Selecting an option will reload the available reviews on the page

Sorry, we don’t currently have any of those types of reviews for this product.