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Nature BIKES
Range GROMMY
Season 2022

You’d love to be small again so you could have one, right? Us too!

Spectacular! Can you imagine having had an ebike to learn to balance on when you were 3 years old? That’s what the Grommy 12 is, an ebike for the littlest ones to teach them how to balance. Designed for riders of between 3 and 5 years old, built with a 6061 aluminum frame and weighing in at only 7.5kg, it has an adjustable saddle height of between 37 and 47cm and up to an hour’s range combined with fully adjustable power delivery. The first and only ebike with pure mountain bike DNA.
Size guide

Components

Technical specs

  • frame

    Frame

    Grommy 12 6061 Alloy Stealth Evo, HHG internal cable routing, Resin footrest, Resin motor cover, Resin chain protector, Post mount disc brake mount.

    sizes

    Sizes

    One size: 190mm

  • fork

    Fork

    MDK 12 Kid, Rigid alloy Stealth stanchions.

    headset

    Headset

    FPD CHEX-1089, Internal ZS, 44/50 upper and lower cup

  • stem

    Stem

    MDK, 6061 melt forged alloy, 25.4mm barbore, rise: 0º, length: 30mm

    handlebar

    Handlebar

    MDK 1.0, 6061 alloy, rise: 25mm, width: 500mm, 9º backsweep, 5º upsweep, 25.4mm barbore

  • grips

    Grips

    Kids

    seatpost

    Seatpost

    One piece Push

  • saddle

    Saddle

    MDK Kids series

    rear brake

    Rear brake

    Tektro MD-510 Mechanical hydraulic, flat mount caliper, 140mm IS 6 bolts rotor

  • brake lever

    Brake lever

    Tektro JL-350RS kids specific alloy 4 fingers

    rims

    Rims

    MDK-Push 12, alloy 21mm internal width, 28 spokes

  • spokes

    Spokes

    CN round stainless steel black

    front hub

    Front hub

    KT K88F 9x100mm cup&cone ball bearings

  • rear hub

    Rear hub

    KT TV-3R 9x110mm cup&cone ball bearings

    front tire

    Front tire

    Vee Tire Crown Gem 12x2.25 27TPI Wired Bead

  • rear tire

    Rear tire

    Vee Tire Crown Gem 12x2.25 27TPI Wired Bead

    rings

    Rings

    10T, steel

  • chain

    Chain

    KMC Z33 Half Link, 1 speed.

    casette

    Casette

    DNP freewheel 16T

  • display

    Display

    MDK LED Throttle 3speed position, battery range.

    motor

    Motor

    MDK brushless 250w Output

  • battery

    Battery

    MDK 4Ah 80Wh

Sizes

Geometry

  Frame size Grommy 12
A Seattube length 155 mm
B Toptube length 400 mm
C Bottom bracket drop
D Bottom bracket height 150 mm
E Chainstay length 285mm
F Seat tube angle
G Effective seattube angle
H Headtube angle
I Fork Offset
J Wheelbase 695 mm
K Headtube length
L Reach
M Stack 345 mm

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