Rowdy Steel meets 29 Plus
The first trail-bike style, short chainstay, big tire hardtail is all Niner and all fun. Based on our wildly popular long travel hardtail geometry, the ROS 9 Plus delivers miles of shreddy riding. The bike features short chainstays for a playful feel (437mm at 9 o’clock BB position), while accommodating 3.0 tires for the ultimate in traction and plushness. The 29 Plus platform is the most versatile of the big-tire options – great for off season riding and a functional daily driver – and now we’ve made the most fun version of this platform available.
ALL STEEL FRAME WITH CUSTOM DETAILS
The ROS 9 Plus is made with 4130 ChroMoly, the go-to material for high abuse applications since the early days of off-road bikes. The tubeset offers the durability and ride quality you want for rowdy rides. Complemented by custom forged 142x12 maxle compatible dropouts in the rear, the frame is designed to resist twist under heavy pedal loads and when cornering and descending. The frame also features high quality details such as internal and external dropper routing, removable cable guides and custom forged seat and chainstay bridges.
CUSTOM 29 PLUS STEEL FORK
What good is a burly, playful frame without a fork to match? Niner has designed an exclusive taper steerer, ChroMoly, 29 Plus-compatible fork with 15mm thru axle, specifically for the ROS 9 Plus. These features combine for sharpshooter accuracy when cornering and descending. This fork also enhances the uphill experience - the maxle prevents brake rotor rub and the 470mm axle to crown length keeps the front end low so that you can get the best climbing position.
BIOCENTRIC II BOTTOM BRACKET
The Niner BioCentric II makes adjustments easy across a wide range of gears and eliminates the need for adjustable dropouts, giving the cleanest possible solution for singlespeed use. No bolt on hubs, no chain tensioners cluttering your ride, no brake adjustments with gear changes. Fine tune your geometry by rotating the BB to high/low or fore aft settings. In geared mode, our CYA cups can be used to adapt the frame to most of todays bottom bracket standards.
ATTENTION TO DETAIL
Although the short chain stays and 3.0 tires limit the ROS 9 Plus to 1X only set up, we kept the removable High Direct Mount on the seat tube for use with chain guides available for this standard. Additionally, we’ve worked with MRP, to design mounts for a custom XCG Bash Guard to protect your precious chainrings from rocks, logs and other trail impacts.
IDEAL COMPONENT SELECTION
The ROS 9 Plus is available as a complete bike only, and features the best in 29 Plus and trail componentry from names you can trust. In addition to the Shimano Deore brakes and the SRAM 1x11 drivetrain, you will find a Niner specified wheelset featuring Stan’s No Tubes Hugo rims and cock pit that includes the Niner Flat Top Alloy Bar in a 780 width for optimal out of the saddle power and a short trail stem for better descending and cornering position.