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NinerWFO 9
WFO E9 3-Star e-Bike

Temporarily Out Of Stock

Item # NNR99AC

Don't get too bummed. This item is on the way and will be available for purchase as soon as it rolls into the warehouse.

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Why We Like The WFO E9 3-Star e-Bike

When the snow finally melts off the highest peaks and the trails are good to go, there’s no waiting for your friend with the pick-up truck to get off work to shuttle a lap. The Niner WFO e9 allows you to run your own shuttle, with the Bosch-powered pedal assist to access the rowdiest terrain the mountain has to offer you. Trails that used to be out of reach are now well within your domain, and the climbs that left us dreading another lap are a chance to enjoy the views. With a trail-gobbling 180mm of coil-sprung rear travel, the WFO e9 amplifies everything we love about mountain biking, so we enjoy the ride more than ever.

Niner built the WFO e9 alloy frame around a 29in front wheel and 27.5+in rear. The larger front wheel better rolls over obstacles in the trail, while the smaller rear wheel allows for shorter chainstays and thus more nimble handling in the tight sections given the increased mass of an ebike. The overall geometry is true to similarly aggressive downhill rigs with an ultra-slack 63.5degree headtube angle to keep the handling stable at speed and a 76degree seat tube for efficiency and comfort on the pedal sections. The rear utilizes Horst link four bar suspension system and 180mm RockShox coil shock for Niner’s supple yet stable suspension feel in an ebike platform.

In designing the WFO e9, Niner turned to the experts at Bosch, as their pedal assist platform has become the pinnacle of ebike systems. The 625Wh motor provides an estimated range of 80km, plenty of distance for even our most ambitious days. Up front, the Bosch Purion display makes it simple to switch between power modes as well as check charge level, so you never end up stranded without a shuttle home, unlike that time your pal bailed on the ride. Five drive modes provide the assist you need for any given scenario, from turbo to eco to walk-assist for a little nudge when getting your bike from point A to B. Bosch’s PowerTube battery is nestled into the downtube of the WFO e9, with an integrated bash guard to protect against any wayward rocks or roots. The Bosch CX motor provides an even and available torque with a maximum of 85Nm and 20mph for the sportiest sections. Even torque means less of the ebike feel of yesteryear with a wrenching to get up to speed. The WFO’s alloy frame helps with the motor’s already superior temperature regulation to avoid overheating.

Niner decks out the WFO in SRAM’s SX Eagle drivetrain for reliable shifting across a 12speed cassette. SRAM’s Guide RE brakes provide powerful speed control as their ebike-specific model to better handle the mass and speed of aggressive riding. Up front, a RockShox Zeb R 180mm fork is a capable partner to the coil spring rear for technical and steep terrain. Stans NoTubes Flow wheels handle the rolling duty, with Maxxis rubber to provide grip through corners and over rock gardens.

  • A pedal-assist mountain bike to access the rowdiest terrain
  • Bosch motor with five drive modes for every situation
  • Alloy frame is durable and helps with motor temperature regulation
  • Downhill-ready geometry maintains stability at speed
  • SRAM SX Eagle rivetrain and Guide RE brakes for precise shifting and stopping
  • Mullet wheel sizes, 29in front and 27.5in rear, optimize handling

Tech Specs
Frame Material6061 aluminum
SuspensionHorst Link
Rear ShockFOX Van Coil LSC, 205 x 65mm, trunnion mount, [small] 400lb spring, [medium] 450lb spring, [large] 500lb spring
Rear Travel180mm
ForkRockShox Zeb R
Front Travel180mm
HeadsetNiner Internal ZS SHIS
ShiftersSRAM SX Eagle 12speed
Rear DerailleurSRAM SX Eagle 12speed
ModesTurbo, eMTB, Tour, Eco, Walk-assist
Drive SystemBosch Gen4 Performance Line CX
Motor Power250W
Battery TypeBosch Power Tube lithium ion
Battery Energy625wh
Max Torque85Nm
Max Range80km
Max Speed20mph
ISCG TabsBosch Gen 4, included chain guard
CranksetPraxis Bosch Gen4 ISIS, SRAM Eagle chainring
Chainring Sizes36t
Crank Arm Length165mm
CassetteSRAM Eagle PG1210
Cassette Range11 - 50t
ChainSRAM SX Eagle 12speed
BrakesetSRAM Guide RE
Brake Typehydraulic disc
RotorsSRAM Centerline, centerlock, 200mm
HandlebarRace Face Aeffect R
Handlebar Rise20mm
Handlebar Width780mm
GripsNiner Grips Lock-On
StemRace Face Aeffect 35mm
Stem Length[medium frame] 40mm
SaddleNiner Custom
SeatpostKS Lev SI
Seat Collar34.9mm
Wheelset[front] Stans NoTubes Flow D 29in, [rear] Stans NoTubes Flow D 27.5
HubsFormula CL-811
Front Axle15 x 110mm thru-axle
Rear Axle12 x 148mm thru-axle
Tires[front] Maxxis Minion DHF 3C EXO TR, [rear] Maxxis Aggressor 2C EXO TR
Tire Size[front] 29 x 2.5in, [rear] 27.5 x 2.8in
Pedalsnot included
Recommended Usedownhill
Manufacturer Warranty5 years

180mm Travel Fork // HIGH

For screen reader users: each row header contains a button that can be toggled to provide additional information.


180mm Travel Fork // LOW

For screen reader users: each row header contains a button that can be toggled to provide additional information.

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Claimed Weight

Claimed weights are provided by the vendor.

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Actual weights are measured in-house by the Competitive Cyclist team.

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What do you think about this product?


>Rating: 4

Very capable emtb, top Bosch motor

I've used it once or twice and have initial impressions
True to size

It´s one of the most capable emtb available now, with 180mm and Bosch CX Gen4, 630w battery and Assegai tires. If you want to upgrade the specs, my recomendation is change the fork (come with Yari - enduro entry level). And not so important but also the rear derailleur (Sram SX - entry level) and the rims (Stans FLOW D - also entry level). You can find similar or quite better value for the money in Commencal Meta Power 29 (170mm Fox 38, XT, DT Swiss rims), or YT Decoy too. Both direct to consumer brands. The differences | "advantages" from WFO to the competitors are: mullet and 180mm. There is no other option in the market nowadays.


Which pedals it has?