10 Best Kids Mountain Bikes of December 2025

• Shimano Tourney 3x7 speed drivetrain has 21 speeds, allowing small riders to conquer dirt trails
• Hl Zoom 40mm travel fork soaks up rocks and roots just like on a bike for Big kids
• Linear pull brakes have adjustable-reach levers to keep them safe and in control

Diamondback Bicycles

• Frame: aluminum suspension frame Fork: suspension fork smoothes bumps and increases control Gearing (# of speeds): 7 speeds
• Derailleur: Shimano rear derailleur for precise shifting Shifter: twist shifters change gears easily Crank: 3-piece crank offers wide gear range
• Brakes: linear pull brakes provide great braking power Wheels/tires: 20" wheels Rims: alloy rims for lightweight durability
• Handlebars: steel handlebars Seat: padded seat Pedals: standard pedals
• Assembly required Dimensions: 51"L x 16.5"W x 35"H

Mongoose R2036WM

• Low stand over aluminum frame for easy on and off; fits ages 4 to 9 years old or 44 to 55 inches tall
• 20 inch wheels keep the bike sized just right for growing kids
• Offers an easy to use Shimano 6 speed twist shifter to get riders used to multiple gears
• Alloy V brakes for speed control and easy stopping

RALEIGH

• Hiland's 10'' low step-over design makes it easy to get on and off the bike.
• Flat handlebars provide responsive control when riding uncertain terrains,6 speeds with grip-type shifter to ease kids into how to use gears.
• Suspension fork with 40mm of travel to smooth the bumps,Linear pull brakes for reliable stopping power.
• 20'' * 2.125 wide tires guarantee miles and miles of dirt grinding fun.
• 85% of the bike is assembled,FREE kickstand,pedals and assemble tool include,EASY TO INSTALL.Suit for 42''-56'' Inch Tall Kids

HH HILAND

• Sturdy steel hardtail mountain bike frame with front shock
• Twist shift 6-speed drivetrain
• Front and rear linear pull hand brakes
• Knobby off road tires
• Quick-release seat height adjustment

BikeB

• Ultra-Lightweight for The Ultimate Experience: Belsize kid’s bike constructed of luxury belt drive and aluminum alloy frame, weighs only 12.57lbs which much lighter than other kid’s bikes on the market. Kids will ride smoother and enjoy it.
• Innovative Belt Drive Bike: Unlike the traditional bicycle, Belsize bike use belt drive, which is no grease marks, as well as improved durability, reduced noise and incredibly low upkeep. It helps kids focus more on riding and feel comfortable.
• High-Quality Brand Parts: The Belsize bike features various famous brand parts, ensure the product quality and service life. The superior texture will make the bike outstanding from those cost less kid’s bike.
• Safety is the Top Of Our Concern: Comes with dual front hand V-brakes for kids to learn how to stop easily. Besides, the hand brakes could be adjusted to fit younger kids. Seat height can be adjusted from 18” To 22”, fits ages 3 to 7 years old kids.
• No Worry about Assembly: 96% of the bike is assembled before packaging and comes with all kinds of accessories and tools needed. Without any hassle, you just need to spend few minutes to complete 5 steps to get the assembly done.

A11N SPORTS

• Aluminum frame for lightweight durability; fits ages 3 to 6 years old or 38 to 45 inches tall
• 16 inch wheels keep the bike sized just right for young riders
• Single speed so kids can focus on the ride without having to shift gears
• Alloy V brakes for speed control and easy stopping

RALEIGH

• Hiland's 10'' steel frame low step-over design makes it easy to get on and off the bike.
• Flat handlebars provide responsive control when riding uncertain terrains,6 speeds with grip-type shifter to ease kids into how to use gears.
• Suspension fork with 40mm of travel to smooth the bumps,Linear pull brakes for reliable stopping power.
• 20'' * 2.125 wide tires guarantee miles and miles of dirt grinding fun.
• 85% of the bike is assembled,FREE kickstand,pedals and assemble tool include,EASY TO INSTALL.Suit for 42''-56'' Inch Tall Kids

HH HILAND

• With a gloss pink hardtail frame and 6 speeds to aggressively ride, the Huffy Stone Mountain is ready for epic, outdoor fun; just follow the steps in our product manual
• An Amazon exclusive: Ideal for ages 5-9 and a rider height of 44-56 inches; durable steel frame is backed by our limited lifetime warranty (see owner's manual for details); Kolo 1200 suspension fork handles bumps and dips for a smoother-feeling ride
• The indexed Shimano TZ-31 rear derailleur combines with the micro-shift twist shifter to deliver 6 speeds on-demand for uphill climbing, downhill riding, or pure acceleration; removable rear derailleur guard ensures consistent gear operation
• 20" x 1.95" ATB tires handle pavement, gravel and dirt with ease; linear pull hand brakes deliver consistent stopping action; padded ATB saddle is stitched for lasting quality; alloy quick release provides easy seat height adjustments
• Slight-rise handlebar enables upright riding to minimize back and shoulder strain; ATB-type resin pedals on the 3-piece Kolo crank have responsive feel; Kraton grips remain comfortable to the touch; alloy wheels in matte black; kickstand included

Huffy

• This Schwinn Koen boy's bike with 18-inch wheels is designed for children 3 - 7 years old or 42 - 52 inches tall. The Koen is perfect for riding to the park or riding on the sidewalk around the neighborhood.
• With Schwinn's SmartStart Technology, this bike is designed just for kids: lighter frame, cranks and pedals are positioned forward, gearing designed for easier starting, narrower pedal positions, and smaller grips and seat.
• Designed with younger riders in mind, this bike includes a rear coaster brake (reverse the pedals to stop) and a front caliper brake (hand-brake like adult bikes); easing the transition to a hand-brake-only bike when they’re ready.
• The adjustable saddle, seat post, and slack seat-tube angle make for easy, tool-free adjustments to allow the Schwinn Koen boy's bike to grow with your child and prepare them for a full-sized bicycle.
• The Schwinn Koen boy's bike with 18-inch wheels comes ready to be assembled and includes the following: training wheels, saddle handle, kickstand, chainguard, and number plate.

Schwinn