Radio Dice BMX Bike


Size Guide

professionally built bmx bikes for sale


  • Suited for a rider 145cm - 170cm tall
  • A great bike for a rider transitioning to 20" wheels
  • One of the only 20" freestyle BMX bikes to come with an alloy frame to really lighten up the ride
  • Radio 3-piece tubular crankset with sealed bearing euro BB further lightens the ride
  • Lower 7.9" standover suits a smaller rider

Small 20 inch BMX bikes are hard to come by! The Radio Dice 20" is the bike we've been waiting for!

The Radio Dice 20 is one of the only freestyle bikes that utilises a lightweight alloy frame with smaller, responsive geometry, for a rider who is just stepping to the ranks of a 20 inch wheel and wants to be able to throw it around.

Stacked with Salt and Radio BMX parts, this Radio Dice is an awesome choice for a younger rider who wants a full size BMX.

    • Top tube length: 20"
    • Chainstay length: 13.2"
    • Standover height: 7.9"
    • Head tube angle: 75°
    • Seat tube angle: 71.5°
    • BB Height: 10.75"
    • Frame: 6061-T6 Alloy
    • Fork: Radio Rookie 20 fork, 1020 hi-ten , tapered legs
    • Bars: Radio Rookie 20, 1020 hi-ten, 8.8" rise
    • Grips: Radio Am grips, flangeless
    • Stem: Radio top loading stem, 50mm reach
    • Headset: FSA A-headset
    • Lever: Radio Am alloy brake lever
    • Brakes: Radio Am alloy u-brake rear
    • Cranks: Radio “Rookie” tubular 3pc crank crmo 165mm, 8 Spline
    • BB: Euro (BSA 68), 19mm sealed bearing
    • Pedals: Radio Rookie nylon/fiberglass pedals
    • Chain: KMC S1 chain
    • Sprocket: Radio Rookie steel 25t sprocket
    • Front Hub: Radio Am alloy hub, loose ball 3/8”s axle, 36h
    • Rear Hub: Radio Am cassette hub, semi-sealed, 9t, 14mm axle, 36h
    • Front Rim: Radio Rookie rim, straight single wall, 36h
    • Rear Rim: Radio Rookie rim, straight single wall, 36h
    • Seat: Radio Century Combo seat/post
    • Seat Clamp: Radio alloy seat clamp
    • Tires: SALT “Tracer” 2.35" front & rear
    • Weight: 11kg

    Please use BMX bike sizing as a guide only. Size guide does not take into account skill level or riding preference, so you may need to get a longer or shorter top tube length to suit your style of riding.

    Junior (smaller than 20" wheels) BMX bikes sizing

    Rider Age Rider Height Bike Size
    1.5 - 4 years  80 - 110cm Balance Bike
    3 - 6 years 95 - 115cm 12" wheels
    4 - 8 years 100 - 130cm 14" wheels
    5 - 9 years 110 - 140cm 16" wheels
    7 - 12 years 120 - 155cm 18" wheels


    20" wheeled BMX bikes sizing

    All bikes below have 20" wheels, which makes the top tube length the determining factor for optimum sizing.

    Rider Height Bike Categories Top Tube Length
    135 - 150cm  Youth BMX bike 18.5" - 20.25"
    145 - 165cm  Youth BMX bike 19.8" - 20.5"
    155 - 170cm

    Youth BMX bike
    Adult BMX bike

    20.25" - 20.75"
    165 - 180cm Adult BMX bike 20.5" - 21"

    175cm +

    Adult BMX bike

    21" - 21.5"


    Larger than 20" wheeled BMX bikes sizing

    BMX bikes with 22" - 27.5" wheels suit riders of many sizes, but can be more practical for taller riders.

    Rider Height Wheel Size
    170cm + 22" and up


    BMX bike shipping info

    All BMX bikes are shipped in a bike box at a flat rate
    of $35 Australia wide.

    Bikes are shipped using Startrack Express or Australia Post,
    some assembly is required once received and can be done using a basic BMX tool kit and bike pump.

    We provide an optional pre-service bike build to
    dramatically cut down on the assembly and prolong the life of your bike, which
    can be added at the checkout.