First Look: New Niner ROS 9 Plus – Big wheels get bigger

29er Event Fat Bike

Niner ROS 9 Plus

Spotted at the Bike Press Camp event in Park City, UT today, this is the brand new Niner ROS 9 Plus. It is the “big brother” of the ROS 9 but with bigger wheels…it is what you would get if you crossed a 29er with a fat bike.

Niner is remaining tight-lipped about the details of this bike until its official launch at the upcoming IMBA World Summit in Steamboat Springs, CO August 20-24. It appears to be made from the same 4130 cro-moly as the ROS 9 and has the same oversized headtube, Bio-Centric II bottom bracket system, same seat tube bend, top tube gusset, in-board rear caliper placement and weld construction. The rigid, tapered steel fork is new, however.

Niner ROS 9 Plus

The geometry also looks identical to the rally-ish ROS 9. This is an interesting take on the 29+ movement started by Surly when they released the Krampus. In fact, the Niner ROS 9 Plus features the same Surly Knard tires as the Krampus in 29×3″ size. Other parts and highlights include:

  • Niner tapered steel rigid fork
  • Niner RDO seat post
  • Niner carbon handlebar, Niner grips
  • Niner Trail stem
  • Avid Trail 9 disc brakes (180mm front, 160mm rear rotors)
  • SRAM X01/X1 drivetrain (10-42 11-speed cassette)
  • Stan’s NoTubes Hugo 29+rim
  • Surly Knard 29×3″ tires

Since this bike was featured in the Stan’s NoTubes suite here at Bike Press Camp, we should also give you information about the all new Hugo 52 plus size rim. The Hugo rim is 52mm wide on the outside and 49.9mm wide on the inside. It weighs 630 grams and is drilled for Shraeder valves for ease of inflation. It features a double wall section in the middle and it has independent drop channels on each side for easy inflation and mounting. MSRP for the rim only is $145 and Stan’s will also be offering the Hugo 52 as a complete wheelset. The Hugo’s are not limited to 29er, as they will also be available in 27.5 and 26″ version later this year.

Stan's Hugo rim

Complete bike weight as shown is in the 27-ish lbs. range. If we can find out any more details, we’ll post them here. For now, take a look through the photo gallery below.

Photo Thumbnails (click to enlarge)
About the author: Gregg Kato

Gregg Kato studied journalism and broadcasting in college while working many different jobs including deejaying, driving a forklift and building web sites (not all at the same time). Kato has been the Site Manager of Mtbr.com for over 14 years and enjoys riding local Santa Cruz trails. Besides being an avid mountain biker, he is also a motorcycle fanatic. Two wheels, one Passion.


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  • Izzy says:

    Wohoho! Awesome!

  • Izzy says:

    Are those Hugo rim widths correct? That would make the rim edge only 1.05 mm thick each!

  • Brian says:

    Great product. Surly geometry is boring. zzzz

    • Brian says:

      If Niner made an aftermarket rigid fork that was the exact same w/ anything cage mounts, sales would be bananas.

  • Tom says:

    Exciting. Any word on what MSRP is for the complete bike?

  • DR Rikardo says:

    Selling as a complete bike only is greedy way of selling shitty components and a testament of a no rider respect!

  • Felix says:

    I have a ROS Plus and have several rides on it. I am still feeling it out or it is me. It was great on single track rooty trails except the 780mm. handlebars present a logistics problem. I had to really watch navigating turns and close spots which took some fun out of bombing down the trails. I have fat bikes and 29er’s and not certain this size has any relevance yet. I can spin my fatback up to the same speed with not much more effort and the 29er’s are quicker handling and more lithe. I need more and varied rides to be able to decide. The quality of the Niner frame, design, and components are good. I remember thinking the first 29er I rode was a barge then I couldn’t ride a 26er after I got familiar with the 29er. maybe the same will happen with the Plus.

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