Built of tough 4130 chromoly, Niner’s ROS 9 wants to plummet down loose, washed-out scree chutes and loft steep rollers while you fight back the giggles. ROS’s beefed up tube set takes advantage of Niner’s innovative rear dropout design which makes it easy to set up the ROS exactly the way you want it—with gears, single speed, whatever turns your lights on—all with the acceleration and responsiveness you get from a 142 x 12mm through-axle in the back.
Niner thought of everything when they designed the ROS, adding internal dropper post routing, removable front and rear derailleur hangers, and even integrated MRP bash guard mounts on the bottom bracket shell. The 44mm head tube allows you to run a tapered fork, greatly increasing front end rigidity so your ROS tracks straight where you aim it. That means when you dive into shenanigans that might trouble Mom, you’ll having the tools to ride it out and show up to Sunday brunch more or less intact.
Niner gave you all the essentials for a go-anywhere trail bike when they spec’d the ROS 2-Star build. A 140mm-travel Fox 34 Float Performance fork masterfully handles whatever chunder you get yourself into. The SRAM GX1 1 x 11-speed drivetrain gives you a wide range of gears for all the trail’s ups and downs in a clean, lightweight setup. Speaking of down, you’ll be glad you have a set of powerful SRAM DB5 hydraulic disc brakes to slow your marginally-controlled self before you blow through the curve, the barbed wire, and into Old Man Brown’s lower pasture. And, just to make the most of every section of trail, Niner threw on a KS dropper post, allowing you to instantly adjust your style from King of the Mountain to snowball headed…well, you know. Irreverently enjoy all your riding on the ROS 2-Star.
|Frame||4130 chromoly, 142 x 12mm through-axle|
|Fork||Fox 34 Float Performance, 140mm-travel, 110 x 15mm through-axle|
|Tires||Maxxis Ardent SC EXO, Front: 29 x 2.4, Rear 29 x 2.25|
|Rear Derailleur||SRAM GX1 11-speed|
|Rear Cogs||Shimano XT, 11-speed: 11-42|
|Handlebars||Niner Flat Top, aluminum|
|Stem||Niner TR Stem|
|Brake Levers||SRAM DB5|
|Brakes||SRAM DB5, 180/160mm rotors|
|Saddle||Niner Custom, chromoly rails|
|Seat Post||KS Dropzone R|
* Subject to change without notice.
|Option||Barcode||Manufacturer's Part Number|
|Forge Grey / Small||032311603908||03-231-16-03-90|
|Forge Grey / Medium||032311604905||03-231-16-04-90|
|Forge Grey / Large||032311605902||03-231-16-05-90|
|Forge Grey / X-Large||032311606909||03-231-16-06-90|
|Purple / Small||032311603267||03-231-16-03-26|
|Purple / Medium||032311604264||03-231-16-04-26|
|Purple / Large||032311605261||03-231-16-05-26|
|Purple / X-Large||032311606268||03-231-16-06-26|