Nimbus Hatchet 27.5" Mountain Unicycle

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product description

The Nimbus Hatchet builds on the amazing platform that the Oregon created, and moves it onto the next level. The frame comes with the brake installed on a new precision IS mount. The hose is also clipped in place with special red aluminium clips. The main challenge with “Fat-Uni’s” is the requirement for a super wide frame. This can make it uncomfortable to ride as it catches the riders' legs. To resolve this the Nimbus Hatchet moves the frame behind the riders legs giving maximum clearance. 

One of the main advantages to larger wheels in general, is the rolling speed. This comes down to larger wheels having a smaller angle of approach for getting over obstacles and bumps / variations in trail surface. They will also carry more momentum due to the increased rotational weight, so maintaining speed is a little easier. The smaller the wheel, the maneuverable it will feel, and the reduced weight will also help with acceleration for when short bursts of speed are needed.


  • This frame will hold a tire up to 26" x 5.05", 27.5" x 4" and 29" x 3.0".

    Note: Michigan Trail Tested, Mother approved!


    Saddle: Nimbus (black) with front lift handle and brake mount - Click Here for Replacement
    Seat post: Nimbus 25.4mm x 200mm aluminum, welded rectangular mounting bracket, 4 hole - Click Here for Replacement
    Seat post clamp: Nimbus (black, not as pictured) double quick, aluminum, 31.8mm - Click Here for Replacement 
    Frame: Nimbus Hatchet 26"/27.5"/29" (gray) aluminum with 42mm machined maincap bearing housings, welded I.S. disc brake mount - Click Here for Replacement
    Hub/axle: Nimbus ISIS drive Disc (black) 32H, hardened CrMo spindle with steel flanges, 125mm center bearing to center bearing - Click Here for Replacement
    Spokes: 14G. stainless black (Disc side 278mm 3x, Non-disc side 280mm 3x) - Click Here for Replacement with red nipples - Click Here for Replacement
    Rim: Sun Mulefut 32H, 80mm wide, single skin with cutouts, ERD 575.5mm
    Rim strip: Sun rim tape, black 
    Tube size: Rubber 27.5" x 4" 
    Tire: 45nrth Vanhelga 27.5" x 3.8" 120tpi Tire 
    Crank arms: Nimbus VCX (Not as pictured) 170mm 
    Pedals: Nimbus black plastic with removable pins CrMo axle with 9/16" threads - Click Here for Replacement 
    Bearings: 22mm x 42mm x 12mm - Click Here for Replacement
    Brake: Hydraulic Disc Brake (180mm Rotor), 37" line (black) 
    Approx. cycle weight: 13 1/2 lbs.


Minimum Inseam Length:
32" (81cm)
Type - Unicycle:
Type - Seatpost Clamp:
Double Quick Release - 31.8mm
Seatpost - Diameter:
Color - Frame:
Color - Rim:
Anodized Black
Type - Crank:
Crank Length:
Type - Pedal:
Bearing Size:
Cycle Weight:
13 1/2 lbs.
Wheel Size:
27.5 inch