Niner Bikes has long been a supporter of IMBA. And, every year, they doll up one of their frames and auction it off in limited quantities — all for the sake of blessed singletrack. This year’s auction is unique in that the bike in question is all-new and being released just for the auction block.

So, the auction/product announcement brings us Niner’s answer to the fatbike — the ROS 9 Plus:

Niner Bikes ROS 9 Plus

Niner ROS 9 Plus Features:

  • Ample tire clearnace¬†up to 3.0 tires
  • Short chainstays for a playful feel
  • 4130 chromoly steel frame
  • Dropper post routing (external or stealth)
  • Niner 4130 chromoly fork with 15mm thru axle
  • 12×142 rear axle for added stiffness
  • Eccentric bottom bracket for singlespeed
  • If geared, it is 1X only — no front derailleur
  • Price: $2999 (X1 kit complete)
  • Learn more

IMBA Auction Limited-edition ROS 9 Plus Singlespeed

As mentioned, the auction starts the same day the ROS 9 Plus is announced and runs through August 24. All proceeds benefit IMBA and the auction is run exclusively through The Pro’s Closet.

Niner Bikes ROS 9 Plus - IMBA Edition

Niner ROS 9 Plus IMBA Edition


The ultra-sweet singlespeed IMBA edition features a custom paint job and top-shelf parts spec including:

  • SRAM XX1 crankset
  • Shimano XTR brakes
  • Stan’s NoTubes ZTR Hugo wheelset
  • Niner RDO seatpost
  • Niner Flat Top RDO carbon bars
  • Niner Trail Stem

So, get your bidding finger ready and try your hand at one of 9 IMBA-edition ROS 9 Plus mid-fat bikes.

Go to Auction: Visit

About Author

A native of the Pacific Northwest, Jason quickly developed a love for the outdoors and a thing for mountains. That infatuation continues as he founded this site in 1999 -- sharing his love of road biking, mountain biking, trail running and skiing. That passion is channeled into every article or gear review he writes. Utah's Wasatch Mountains are his playground.

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