The Trek Kids Wahoo 20 Trail Bike turns neighborhood loops and dirt paths into confidence-building adventures, giving young riders a real mountain bike feel that’s light, responsive, and ready for after-school laps that somehow stretch until dinner.

From Trek’s trail-inspired geometry to the Wahoo 20 Trail’s lightweight carbon fork and hydraulic disc brakes, every detail is built for control and durability, with a 9-speed microSHIFT Advent drivetrain, 20x2.20" tires, and compatibility for an internally routed 31.6mm dropper post as skills level up.

Key Features

• Wheel Size: 20"
• Tire Size: 20x2.20"
• Max Tire Size: 20x2.40"
• Drivetrain Speed: 9-speed
• Brake Rotor Size: 160mm front & rear
• Max Brake Rotor Size: 160mm front & rear
• Chainring Size: 30T
• Frame: Alpha Silver Aluminum 20" frame designed for kid-specific trail geometry with internal routing compatibility for a 31.6mm dropper post
• Fork: Wahoo 20" carbon fork with post mount disc brake interface and ThruSkew 5mm quick release
• Drivetrain: microSHIFT Advent 9-speed system with SL-M6295 trigger shifter, RD-M6195S rear derailleur, and 11–38 cassette for simple, wide-range gearing
• Braking System: Tektro HD-J285 hydraulic disc brakes with 6-bolt 160mm rotors for consistent stopping power
• Wheelset: Formula DC-20/DC-22 alloy hubs with 6-bolt mounts laced to 20" alloy rims with 28 spokes
• Contact Points: Bontrager alloy handlebar and stem with kids’ grips and padded kids’ saddle for stable control and comfort
• Fit & Control: Upright, confidence-focused geometry paired with thumb-activated trigger shifters for easy gear changes
• Dropper Post Compatibility: Frame accepts an internally routed 31.6mm dropper post for improved movement on descents
• Fender: Trek custom front fender included for trail spray protection