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Available to physical shipping addresses in the 48 continental United States. Some items are subject to additional oversize charges. All bikes are built prior to shipment and may take 2-3 days prior to shipping. Learn more
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What do you get when you cross a 29er with a fat bike? The answer is the Niner ROS 9 Plus! By using the insanely popular ROS 9 long travel hardtail geometry to draft up the blueprint for the ROS 9 Plus, Niner has introduced the first trail-esque rigid 29+ shredding machine.
Many of the 29+ Bikes on the market are designed around a short-travel cross country geometry, whereas the ROS 9 Plus takes it in a different direction. Niner slackened the headtube and shortens the chainstays to make this a true fun factory of a bike. The frame is built for 29x3.0" tires which take traction and plushness to previously unknown levels. If you've never ridden 29+, you're destined to have a big grin on your face the moment to unleash this beast on the trail.
Niner built the ROS 9 Plus from 4130 ChroMoly steel, a bombproof material that will absorb the abuse inflicted by the most unforgiving of trails, offering the resilience and ride quality you want for unruly riding. Its razor sharp handling is augmented with a custom forged 142x12 Maxle compatible dropouts in the rear, the frame is further equipped to resist twist under heavy pedal loads and when cornering and descending. Up front, the matching tapered chromoly steel fork features a unique 15mm thru-axle and a 470mm axle to crown length to keep the front low so that you can get the best climbing position. Additionally, the ROS 9 Plus frame also features clever details that are a little less noticeable, such as internal and external dropper routing, removable downtube cable guides, Biocentric II Bottom Bracket and custom forged seat and chainstay bridges. With the included BioCentric II eccentric bottom bracket, the frame is easy to run as a single-speed if you so wish. If you're going to keep running this as a multi-speed, the BB height can be adjusted when using a BioCentric II bottom bracket to fit this bike to your specific needs.
Although the short chainstays and 3.0 tires limit the ROS 9 Plus to a 1X only set up, Niner has kept the removable High Direct Mount on the seat tube for use with chain guides available for this standard. Additionally, Niner worked with MRP, to design unique mounts for a custom XCG Bash Guard to protect the precious chainrings from rocks, logs and other trail impacts.
The bottom line is, when a rowdy steel frame with a slackened headtube and chiseled chainstays meets the 29+ wheel, you get a bombproof bike that's jonesin' to be shown a good time.
| Frame | Niner ROS 9 Plus, 4130 Cro-Mo tube set, 142x12 Maxle, external or stealth dropper routing |
|---|---|
| Wheel Size | 29" Plus |
| Fork | Niner 4130 Cr-Mo Fork, 15MM, tapered |
| Headset Included | Yes |
| Headtube Diameter | Tapered 44/56mm |
| Front Derailleur | Direct mount |
| Bottom Bracket | 73mm external threaded with included Niner BioCentric BB |
| Seatpost | 31.6mm |
| Seat Clamp | 35.0mm (included) |
| Dropout Style | 12 x 142mm (Axle included) |
| Accessory Mounts | Water bottle cage |
| Cable routing | External with removable guides |
| Intended Use | Trail, All-mountain |
| Weight | - |
| Size | Small | Medium | Large | Extra Large |
|---|---|---|---|---|
| A: Seat Tube Length | 378 14.9 | 411 16.2 | 467 18.4 | 530 20.9 |
| B: Effective Top Tube | 578 22.8 | 595 23.4 | 614 24.2 | 633 24.9 |
| C: Stack | 598 23.5 | 607 23.9 | 621 24.4 | 621 24.4 |
| D: Reach | 404 15.9 | 418 16.5 | 434 17.1 | 453 17.8 |
| E: BB Height | - | - | - | - |
| F: BB Drop | 56 2.2 | 56 2.2 | 56 2.2 | 56 2.2 |
| G: Head Tube Length | 100 3.9 | 110 4.3 | 125 4.9 | 125 4.9 |
| H: Head Tube Angle | 69.0 ° | 69.0 ° | 69.0 ° | 69.0 ° |
| I: Seat Tube Angle | 74.0 ° | 74.0 ° | 74.0 ° | 74.0 ° |
| J: Standover Height | 684 26.9 | 711 28.0 | 756 29.8 | 803 31.6 |
| K: Chainstay Length | 445 17.5 | 445 17.5 | 445 17.5 | 445 17.5 |
| L: Wheelbase | 1094 43.1 | 1112 43.8 | 132 5.2 | 1151 45.3 |
| Suggested Rider Height | 161-175cm 5'3"-5'9" | 173-183cm 5'8"-6'0" | 181-191cm 5'11"-6'3" | 191-201cm 6'3"-6'7" |
CALIFORNIA PROPOSITION 65 WARNING: This product can expose you to chemicals including (Cadmium, Phthalates, Bisphenol, Nickel (Metallic), di(2-ethylhexyl)phthalate "DEHP") Lead, which is known to the State of California to cause cancer and/or cause birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
Most items SHIP SAME DAY if ordered by 3pm PST and FREE SHIPPING on orders over $50. Please note that oversize charges may still apply on some heavy or large items and free shipping does not apply to PO Boxes.
1-day free standard Shipping on most orders to California, 2-day free standard Shipping on most orders to Nevada, Arizona, & Utah. Other states can expect delivery within 3 to 5 days.
Jenson USA ships worldwide, including APO/FPO addresses. For a more specific shipping quote and transit time estimate, simply add the items you are interested into your shopping cart and look for the "Shipping Options" box at the top of the cart page. You don't have to login or create an account to see shipping charges and time in transit estimates.
Bike Shipping: Most complete bikes ship for a $99 oversize shipping fee, unless otherwise noted. Free shipping thresholds do not apply to complete bikes.
Some manufacturers restrict where we can ship their products. If this item has shipping restrictions, they are listed below. If you'd like to buy an item that we cannot ship to your address, we can accept your foreign credit card and ship it to a US address for you.
Due to manufacturer restrictions, this product cannot be shipped to the following locations:
We strive to get you the gear you want at a competitive price. If you find an item we offer from a competitor at a lower price, let us know. We will do our best to instantly match their price. To qualify for the Price Match, your purchase must meet the following conditions:
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Get free shipping, on most items, with your $50 purchase today. Same day shipping on most orders if placed by 3pm PST. Visit your cart and update the shipping destination to see the estimated delivery days for your order.
This offer is only available to physical shipping addresses in the 48 continental United States (no PO Boxes), and some exclusions apply.
Some large and/or heavy items are subject to additional oversize charges that are separate from standard shipping costs.
All bikes are built, tested, tuned, and ready to ride upon shipment. The bike build process typically takes 2-3 days to complete depending on the bike model and the complexity of the build.
Orders for in-stock items placed by 3PM PST usually ship on the same day. Orders that include special-order or backordered items may be subject to shipping delays depending on product availability. Refer to estimated delivery times in cart when selecting shipping options.