Whether it's climbing and going down steep trails or jumping high at bike parks. Enjoy your riding and discover yourself.


No hands, more tricks. With our robust and specific geometry-designed dirt jumper and BMX bikes, you'll go from ground to air and back again smoothly and safely.


Chasing for speed and against the wind, or fun Sunday club ride with friends around town; all you need is here.


Whether it's a fun tour with friends on gravel roads, or just keep riding into the unknown. Unlock yourself, it all starts here.


Bikes have given us a lot. It helps us to live a life that we can be happy with and proud of; so we want to share that and bring a healthy and joyful day-to-day routine.


These years, we have come further to build a smart living. We bring you our E-bikes, to take you to discover more trails, more loops, and discover future.


What's more lovely than the childhood memories? Ouch! Perhaps the one that crosses your mind right now is that first scar that you got while riding on a bike! But hey, it was also a lovely family time, the first taste of courage to learn how to get back on after falling off, and go on adventure with new friends. So, go get bikes for your kids, and see those beautiful things also happen to them.


A big leap. Mount Bromo N is built around Polygon's latest suspension platform – the Independent Floating Suspension (IFS) – to really take you beyond. The IFS controls the wheel path to accelerate your bump performance without sacrificing the suspension progressiveness. And the result? The hills become flats, the obstacles turn to glory, and all the roads become shorter. Welcome and enjoy a new way to discover the unseen
For us, Enduro bikes should be burlier to nail larger drops more efficiently and literally anything that the rugged mountain throws. And, yeah! We're here for all of that. We've packed all that we know these years to build you an Enduro bike that is faster on the descents and also for pedalling back uphill to start another one. Get ready to feel the rage of mountains and be in a class of your own. See more...
  • SKU : 502715
  • Note :
Impeccably versatile
Conquer everything
Indisputably fun
Go further
  • Impeccably versatile

    The classic dichotomy between sensitivity and support, eliminated. The Independent Floating Suspension (IFS) enables Bromo to ride on treacherous roots and smash through massive drops without hesitation

  • Conquer everything

    Through the IFS platform, Bromo adopts a vertical wheel path that enables almost complete dissipation of force from square-edge hits. The result is a bike that handles punishments almost as well as riders enjoy dishing them out.

  • Indisputably fun

    Don't judge a bike by its weight. Designed with the shortest chainstay in its class, Bromo is as maneuverable and quick around corners as a greyhound chasing its prey. Fat is the new fun.

  • Go further

    No one ever think enthusiastically about ascending on climbs on an MTB. With extra torque up to 85Nm, the hills become flats, anywhere is biking distance, and obstacles turn to glory.

  • Frameset

    Alx Alloy AM/ENDURO 160mm (29") Travel


    Fox Performance 38 Float 160mm (29") Travel, Float 3-Pos, P-S, Offset: 44mm, Boost 15x110mm

    Rear Shock

    FOX, Float X2, Air Spring, P-SE,A,2POS-ADJ, 205x65mm Trunion E2E


    29" (S-XL)

    Frame Color

    Black/Holographic Silver

    Decal Color

    Black/Holographic Silver

  • Drivetrain

    Shimano XT SL-M8100, 12-Speed, I-SPEC-EV


    E13, E-Spec Plus Crank, 160mm, E-Spec Plus Chainring, 34T, (S-XL), Direct Mount


    Shimano CS-M6100, 12-Speed, 10-51T Micro Spline

    Rear Derailleur

    Shimano XT RD-M8100, 12-Speed, Direct Attach


    Shimano Drive Unit EP-800


    Shimano CN-M6100, 12-Speed


    Flat Alloy W/ Replaceable Pin

  • Cockpit

    Entity Xtent


    TranzX Alloy Dropper 150mm (S-M) / 170mm (L-Xl) Travel, 30.9X459mm (S-M)/30.9x499mm (L-Xl), 0mm Offset


    Entity, Alloy, 35mm BarBore, 780mm, 25mm Rise, 9 Degree Backsweep


    Entity, Alloy, 35mm BarBore, 35mm Ext, 0 Degree


    FSA No.57E ORBIT 1.5E Zero Stack (Zs) Sealed Bearing, ZS 44/28.6 | ZS 56/40

  • Wheel & Tire
    Wheel Set


    Wheel Size



    SCHWALBE Magic Mary 29"x2.6", Super Gravity, Addix Soft, Foldable, TLE Tubeless Ready


    Entity XL2 Disc 32H, 622-35 (29”), Tubeless Ready


    Shimano XT HB-M8110 / FB-M8110, 32H, Center Lock, Boost 15X110mm, Boost 12X148mm, Micro Spline


    Entity Stainless, Brass Nipple, F: 296/294mm, R: 294/292mm

  • Brake
    Brake Lever

    Shimano XT BL-M8100, I-Spec-EV

    Brake Caliper

    Shimano XT BR-M8120 4-Piston


    Shimano RT-MT800 (F) / RT-EM810 ( R ), 203mm, CenterLock

  • Electric Parts

    Shimano DU-EP800 Mid Motor


    Shimano EW-SS301


    Shimano BT-E8035, 504W/H, Internal Battery


    Cycle Comp Shimano SC-EM800, Clamp, 35mm


    Speed limit up to 32 KM/H

  • Other
    Frame Weight

    4.76 Kg (Size M) W/O Shock

    Bike Weight

    24.5 Kg (Size M)

Geometry & Size
A brief explanation of geometry is placed here. The geometry image below will stay / freeze.
Height (cm) 152-165 162-175 172-185 182-195
Seat Tube Length (A) 400 15.75 410 16.14 420 16.54 430 16.93
Seat Tube Angle (B) 70 2.76 70 2.76 70 2.76 70 2.76
Effective Seat Tube Angle (C) 77 3.03 77 3.03 77 3.03 77 3.03
Head Tube Length (D) 100 3.94 105 4.13 110 4.33 120 4.72
Head Tube Angle (E) 64.5 2.54 64.5 2.54 64.5 2.54 64.5 2.54
Effective Top Tube (F) 595 23.43 616 24.25 637 25.08 659 25.94
Bb Height (G) 345 13.58 345 13.58 345 13.58 345 13.58
Bb Offset (H) 35 1.38 35 1.38 35 1.38 35 1.38
Chainstay Length (I) 435 17.13 435 17.13 435 17.13 435 17.13
Wheelbase (J) 1212 47.72 1234 48.58 1256 49.45 1281 50.43
Frame Reach (K) 450 17.72 470 18.5 490 19.29 510 20.08
Frame Stack (L) 626 24.65 631 24.84 635 25 644 25.35
Standover Height (M) 710 27.95 710 27.95 710 27.95 710 27.95
  • The bike comes with 29x2.6” tires front and rear. Can I fit 27.5+ wheels to convert it to a ‘mullet’ or full plus tire set up?

    The frame has clearance for a 27.5x2.8" tire so a mullet (29” front, 27.5+ rear) is possible. However, the diameter of a 27.5x2.8" tire is significantly smaller than the standard 29x2.6" tire, hence changing to a mullet setup would reduce BB height and pedal to ground clearance while also slackening both the effective seat and head tube angles.

    The fork will also fit a 27.5+ tire, however, this is highly discouraged as the BB drop would become dangerously low.

    We recommend staying ready for business with 29" all-round.

  • Can I use a different rear shock?

    Most 205mm x 65mm Trunnion Mount shocks should fit. The leverage curve can work well with a coil shock. However, it’s worth noting that Polygon has Fox tune the stock rear shocks to work best with the specific bike model, so a standard tune replacement shock may not offer optimized performance.

  • Can I change the fork?

    You’ll need to use an e-MTB rated fork to ensure it is strong enough to withstand the additional forces and punishment that can be encountered by e-MTBs. The standard forks are 160mm travel, but you can run up to 170mm travel if you like. You cannot use a dual crown fork as the frame is not designed or tested to withstand the different loads.

  • Can Mt Bromo N fit a chainguide?

    For sure. In fact, both N7 and N8 models come equipped with an e*thirteen E*Spec Plus top guide. The chain guide mounts directly to the drive unit and the bolt pattern is different from traditional ISCG/05, so most ‘normal’ chain guides are not compatible.

  • What size rotors can I use?

    You can run up to 220mm rotors front and rear. While you can downsize from the standard 203mm to 180mm, we suggest not to.

  • How do I remove the battery?

    Insert a 4mm Allen key into the hole above the battery cover on the underside of the downtube. Rotate it in the direction depicted by the arrow to release the battery lock. This will allow the battery to hang slightly down from the tube, creating access to the battery release lever at the top of the battery. Be sure to use two hands when releasing the battery as it’s quite heavy and shouldn’t be dropped.

  • How do I install the battery?

    Ensure the battery connections are clean and dry. Install the base of the battery into the lower mount closest to the motor, then press the top of the battery into the downtube until you hear and feel a “click”. Then your battery is installed.

  • How do I charge the battery?

    The battery can be charged either installed in the bike, via the charging port on the left side in front of the motor or detached from the bike using the additional connection port supplied with the charger.

  • I like to ride in mud, are the electronics weather-proof?

    Yes. The SHIMANO STEPS systems are waterproof for use under normal riding conditions, including heavy rain. Please do not use a high-pressure washer to clean your bike.

  • How fast can I ride?

    When gravity is on your side, there is no limiting your speed beyond that of a “normal” MTB with 160mm of awesome suspension. As far as motor assistance is concerned, the Shimano STEPS systems will provide motor assistance up to 20mph (32km/h) in the USA and Indonesia, or 25km/h in Europe and Australia.

  • How far can I ride?

    The range of any e-MTB depends on many variables, including terrain, gradients, rider weight, assistance mode, rider input, ambient temperature, etc. While 100km adventures are definitely achievable aboard the Mt Bromo N, we recommend using the Range overview on the display for the best estimate. The range overview is recalculated continuously by calculating speed, rider behavior, and power consumption. This means that range overview makes a prediction, which can vary depending on these different factors.

  • Can the Mt Bromo N fit a larger battery?

    No, Mt Bromo N was designed around Shimano’s BT-E8035 504Wh battery as it helps Bromo hit the sweet spot of lighter weight for agility, attainable price points while still offering enough capacity for very big rides. The larger 630Wh battery is too long to fit in the frame.

  • Can I get a spare battery?

    Yes. A BT-E8035 504Wh battery can be purchased through your Polygon retailer or most good bike shops. The bolt-on battery cover (Article Code #733723) will need to be purchased through Polygon or a Polygon retailer.

  • Can I run a headlight from the Shimano battery?

    Yes. Shimano-approved front lights can be connected to ports in the STEPS drive unit (motor). This requires significant internal routing and e-system component removal so we recommend having this upgrade made by a certified Shimano STEPS workshop.

  • The display states W013 error code and the motor has no power. How can I fix it?

    W013 is likely the most common error for first-time STEPS users. Officially, W013 means the Initialization of the torque sensor was not completed successfully. Don’t fret. It typically occurs when the system is turned on while a load is applied to the crankset. Try turning the system off, ensuring your foot is not on a pedal and the cranks or pedals are not leaning on the ground or against a wall; then turn the system back on again. This should solve the issue.

    If you still see the issue try a 'hard reset' - press the power button for 12 seconds and power on once again.

    If W013 or any other error code persists, contact your place of purchase or a certified Shimano STEPS workshop.

  • I want my drivetrain to last a long time. Are there any tricks to smooth shifting on an e-MTB?

    While Shimano’s HYPERGLIDE+ 1x12 drivetrains offer very smooth shifting even under the load of EP8’s 85Nm, we recommend only shifting one gear at a time (up or down the cassette) and try to back off the power through the cranks a little as the integrated torque sensor will immediately react and also back off the motor’s power. Trail mode is much more intuitive with this than Boost mode. We recommend saving Boost mode for cranking straight-up big climbs where gear shifting is limited.

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