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Giant ARX 20 2020 Kids 20 Inch Mountain Bike


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Free delivery

Free delivery

We don’t charge anything for standard delivery to the UK mainland over £20.

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Collect in-store

Pick up your order at your nearest store any day of the week.

Easy returns

Easy returns

Faff-free returns and exchanges if you’re not absolutely satisfied with your purchase.

Product Details

Giant ARX 20 2020 Kids MTB

The Giant ARX 20 is Giants lightweight 20 inch-wheel kids' bike, recently awarded 10/10 by Cycling Weekly. A vast range of colour options giving plenty choice!

Key Features

  • Lightweight ALUXX-Grade aluminium frame - giving better control for younger riders
  • ALUXX-grade aluminium fork
  • Shimano 1x8 speed gearing with good range of gears with its 32T chainset and 12-32T cassette to tackle various terrains
  • Linear pull brakes
  • Giant alloy rims, nutted hubs with stainless steel spokes
  • Giant Youth, 480mm width handlebars
  • Colours: Red, Yellow, Blue, Green, Orange

Giant ARX 20 Sizing Guide

Suitable for kids who are 120 - 140cm / 3' 11" - 4' 7" in height. Please note this is a guide only, please get in touch if you're unsure.

Why Buy From Us?

  • Voted Britain's Best Bike Shop 2017/18
  • Rated excellent on Trustpilot by our customers
  • Free bike delivery
  • No fuss returns
  • Bikes arrive built by expert bike mechanics
  • Independent since 1977 - cooperative, not corporate. Read our story. 

Shop All Kids Bikes >

Shop All Bikes for Ages 6 - 9 (20 - 24 Inch) >

Shop All Bikes For Ages 10 - 14 (24 - 26 Inch) >

Kids Bike Size Guide >

Technical Specifications

Giant ARX 20 2020 Kid's Mountain Bike 
FrameALUXX-Grade Aluminum
ShiftersShimano SL-M310
Rear DerailleurShimano Altus RD-310
ChainsetAlloy forged 3-piece, 32, with Chain Guard
Bottom BracketSealed cartridge
Cassette / FreewheelShimano HG200, 12x32
RimsGiant Kids 20, 6061 aluminum, with CNC braking surface
HubsAlloy, F 28H QR,R 28H NUT
SpokesStainless, 14G
TyresInnova, 20X1.5, 60tpi
BrakesAlloy linear pull
Brake leversAlloy, Junior MTB
HandlebarsGiant Youth, 480mm width
StemForged alloy Ahead
SaddleGiant Grow Technology Jr. Sports
SeatpostGiant Sports, 27.2 x 250mm


Our suppliers reserve the right to change specifications and prices without notice. Edinburgh Bicycle Cooperative will do all it can to maintain prices and specifications on this web site, however we do reserve the right to change specifications and prices without notice. Similarly, despite the wonders of modern computers, it is realistic to expect the colour of any item bought to differ subtly from the image online.