Giant XTC JR 20 inch Mountain Kids Bike

The Giant XTC JR 20 is a 20-inch aluminium kids' mountain bike with a 50mm-travel suspension fork, Shimano 1x7-speed twist shifting and V-brakes. Giant recommends it for riders 120–140 cm tall, making it a first trail bike for kids ready to tackle slopes and gravel.

Key highlights

• Category: 20-inch kids' mountain bike, 7-speed, V-brakes
• Brand: Giant (Taiwan), XtC Jr range
• Rider height: 120–140 cm (Giant official); stand-over height 524 mm
• Frame and fork: ALUXX-Grade aluminium frame; HL steel suspension fork, 50mm travel
• Drivetrain: Shimano REVOSHIFT twist shifter, 1x7-speed, Shimano Tourney rear derailleur, 14-28T cassette
• Tyres: Giant Junior Sport 20x2.1"
• Extras: Bell, kickstand
• Best for: Kids who want to move on from flat paths to slopes and off-road trails

Giant XTC JR 20: a first mountain bike for kids

From neighborhood paths to family off road rides, XTC JR. gets them started on the trail.Boasting design inspiration from Giant adult mountain bikes, XtC Jr. is perfect for getting young trail riders stoked on riding dirt. Featuring a lightweight aluminium frame, fast-rolling 20 or 24-inch wheels and trail-ready tyres, XtC Jr. is ready for adventure.

HERE’S A TICKET TO HIT THE TRAIL. THE XTC JR. 20 IS THE PERFECT WAY TO INTRODUCE YOUNG RIDERS TO OFF-ROAD RIDING.

Lightweight frame

ALUXX-grade aluminum frame provides a lightweight, purpose-built chassis for aspiring young off-road riders. Giant describes ALUXX as 6061 alloy with single-butted tubes.

Confidence and control

Size-specific wheels and front suspension give young riders the performance they need for true off-road riding. The fork has 50mm of travel.

Kid-friendly features

Youth-specific performance components help young riders improve their off-road skills, including Giant Junior grips, a Giant Jr. Sports saddle and junior MTB brake levers.

Twist shifting that is easy to use

Shimano REVOSHIFT is a twist shifter: kids change gear by twisting the grip with thumb and index finger, without taking their hands off the bar. With 1x7 gearing (32T chainring, 14-28T cassette) there are more gear options for hills than on a single-speed kids' bike.

Features

• HL steel suspension fork, 50mm travel for comfort and control
• Alloy crankset, 32T
• 7-speed drivetrain to get the young rider over hilly terrain
• Size: 20" wheel

Who is it for?

Good fit: Kids 120–140 cm tall who want to try slopes and gravel paths beyond flat ground.

Less suitable: Kids close to or above 140 cm, or growing fast, may be better on the 24-inch Giant XTC JR 24 (Giant recommends 130–150 cm). For mostly flat riding without suspension, see the rigid-fork Giant XTC JR 20 Lite.

XTC JR 20 vs XTC JR 24

Source: Giant official specifications and geometry for the XtC Jr 20 (2022) and XtC Jr 24 (2021 and 2022).

Specifications

Brand	Giant
Size	One size, 20" wheels
Rider height	120–140 cm
Frame	ALUXX-Grade aluminium
Fork	HL steel suspension, 50mm travel
Handlebar	Giant Sport, alloy, 31.8mm, 520 mm wide
Grips	Giant Junior
Stem	Forged alloy Ahead, 8-degree, 60 mm
Seatpost	Alloy, 27.2mm
Saddle	Giant Jr. Sports
Pedals	Platform
Shifter	Shimano REVOSHIFT, 1x7
Rear derailleur	Shimano Tourney
Brakes	Alloy, linear pull (V-brake)
Brake levers	Alloy, junior MTB
Cassette	14-28T
Chain	KMC HV500
Crankset	Alloy, 32T
Bottom bracket	Semi-cartridge
Rims	Giant Kids 20", alloy
Hubs	Nutted, 28h
Spokes	Stainless, 14g
Tyres	Giant Junior Sport, 20x2.1", 22 tpi
Extras	Bell, kickstand
Weight	Not published by Giant

Specifications source: Giant official XtC Jr 20 (2022, Good Gray) specifications and geometry. Other colours on this page are earlier Giant model years and some parts differ (for example, the 2019 model used 20x1.95" tyres and a 36T chainring; the 2021 colour was Pure Red). Please contact us before ordering another colour to confirm the build.

SIZING GUIDE AND GEOMETRY

Sizing to be used as a reference only. Please check with a local authorized dealer to determine the correct size.
Available sizes may vary from country to country.

*Adult Assemble is Required

Technology

Jollymap's advice

Jollymap's article on choosing a kids' bike puts height and inseam first. Giant recommends the XTC JR 20 for riders 120–140 cm, with a 524 mm stand-over height that you can compare with your child's inseam. If your child's height sits where the 20" and 24" ranges overlap (130–140 cm), chat with us before ordering or message our Facebook page with your child's height and inseam.

"Easy Take" Bike Delivery Service

- Bike 100% assembled

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- Anti-collision packaging for protection

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Please click here for more details.

*Componts and parts may vary in different production batches. Enquiry is welcome.

為小朋友選擇兒童單車不可不知的6大因素

From now on, every purchase of children's bicycle, tricycle, scooter or balance bike, we will sponsor one kid from deprived group to play in Playscope of Playright.

FAQ

What height is the Giant XTC JR 20 for?

Giant recommends it for riders 120–140 cm tall. The stand-over height is 524 mm, so you can measure your child's inseam to compare.

What is the difference between the XTC JR 20 and XTC JR 24?

The main differences are wheel size and rider height: the XTC JR 20 has 20" wheels for riders 120–140 cm, while the XTC JR 24 has 24" wheels for riders 130–150 cm and a wider-range 14-34T cassette. Both have an aluminium frame, 50mm suspension fork, 7 speeds and V-brakes.

What is the difference between the XTC JR 20 and the XTC JR 20 Lite?

The fork. According to Giant's specifications, the XTC JR 20 has a 50mm-travel suspension fork, while the XTC JR 20 Lite has a rigid high-tensile steel fork with no suspension. Giant lists front suspension as part of what gives young riders the performance they need off-road.

How much does the Giant XTC JR 20 weigh?

Giant does not publish a weight for the XTC JR 20. Giant's website explains that weight varies with size, finish, hardware and accessories, and that the most accurate way is to have a dealer weigh the bike.

Does the XTC JR 20 have disc brakes or V-brakes?

V-brakes. Giant's official specification lists alloy linear-pull brakes (V-brakes) with junior MTB brake levers.

How do you change gear on the XTC JR 20?

With a twist shifter. Shimano REVOSHIFT lets the rider twist the grip with thumb and index finger to move through the 7 gears, without taking their hands off the bar.

Does it come with a kickstand and bell?

Yes. Giant's official specification lists a bell and kickstand as extras.

Where can I buy the Giant XTC JR 20 in Hong Kong?

It is available from the Jollymap online shop. To check the colour or whether the size suits your child before buying, chat with us or message our Facebook page.

Last updated: September 2026