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Nature BIKES
Range GROMMY
Season 2021
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 postition, battery range.

    motor

    Motor

    MDK brushless 250w Outoput

  • 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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