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Specialized Jett 20" Kids Bike

Jett 20" Kids Bike

Regular price $299.99
Regular price $500.00 Sale price $299.99
Sale Sold out


One Size 3'11" to 4'7"


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Our Platinum Pro Assembly fee of only $39 (reg. $75) will be added at checkout. Your Specialized kids bike will be built, fine-tuned and expertly packaged by our certified team of bike techs. Your new bike comes 90% built, reassembly is quick and easy with our video guides. Your new bike ships within 3-5 business days.


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Introducing the Specialized Jett 20" Kids Bike—a turbocharged ride for your little speedsters that's as versatile as it is sleek. Kids are like shooting stars, zipping through growth spurts faster than you can say "zoom!" But fret not, because Specialized cracked the code on the ultimate bike fit for the pint-sized thrill-seekers.

The Jett is a two-wheeled genius that evolves with your kid's growth, leaving you worry-free about outgrowing their ride. Specialized did some brainy research (yes, they hit the books!) and discovered the secret sauce: kids' arms and legs sprout like beanstalks while their torsos play catch-up. Armed with this insider knowledge, they engineered a bike with kid-centric features that can handle every growth spurt and wheelie-popping adventure.

Adjustability is our middle name, and the Jett Multispeed proves it. Its handlebars play a game of tag with your kid's arms, ensuring a perfectly comfy reach as they stretch out. Those 2-hole position cranks and longer seat tubes? They're the dynamic duo that guarantees your young speedster finds their pedal-pushing sweet spot, every time.

Specialized went all mad scientist on the Jett's frame and components, making it one of the lightest rides on the block. Translation: your kid will be zipping around with the energy of a supernova, and you'll need a lasso to pry them off this bike.

So, gear up for adventure, and let the Jett 20" Kids Bike launch your future trailblazers into a world of pedal-powered excitement. Get ready to witness the next generation of riders in action, because with the Jett, they're locked, loaded, and ready to Jett-set-go!


  • Specialized designed the Jett Multispeed to be uniquely adjustable with 2-hole position cranks, adjustable handlebars, and longer seatposts so kids can dial-in the perfect riding position as they grow.
  • Every detail of the Jett Multispeed—including the 130mm Bridge saddle, narrower-diameter grips, and short-reach, tool-less adjustable brake levers—was informed by Retül data from a kids’ research group to be perfectly proportional for young riders.
  • A lightweight bike is simply more fun and the Jett Multispeed’s all-new A1 aluminum frame, alloy fork, Pathfinder tires, and 7-speed drivetrain make it one of the lightest kids’ bikes on the market.



A1 Premium Butted Alloy, unisex frame, internal cable routing, 135x10mm forged dropouts, replaceable derailleur hanger


A1 Premium Butted Alloy, Alloy steerer, V-Brake

Seat Binder

Bolt-type, 31.8mm


3D Forged Aluminum, 35mm length, 6 degree rise, 25.4mm clamp diameter


Alloy Mini Rise, Double Butted, 60mm Rise, 5-degree Backsweep, 580mm Width, 25.4mm Clamp Diameter, 19mm Bar End Diameter


Jett Body Geometry, 19mm Internal Diameter, lock-on


Kids Bridge Saddle, 130mm


Alloy, 2-bolt, 14mm offset, 27.2mm, 280mm length

Front Brake

V-brake w/ tool-less reach adjust brake lever

Rear Brake

V-brake w/ tool-less reach adjust brake lever


SunRace, 7-Speed, 11-34t




Forged Alloy, Square Taper, Adjustable 105/125mm Length, w/ Chainguard


Forged Alloy, 34T

Bottom Bracket

Square taper, Plastic cups, 113mm spindle

Rear Derailleur

Shimano RD-M310, 7-speed
microSHIFT TS39 , 7-speed


Nylon platform w/ reflectors


Alloy, 14mm Depth, 23mm Internal Width, 28H

Front Hub

Alloy, Loose Ball Bearings, Bolt type, 100mm Spacing, 28H

Rear Hub

Alloy, Loose Ball Bearings, Bolt type, 135mm Spacing, 28H


Stainless, 14g

Front Tire

Pathfinder Sport, 20x2.0"

Rear Tire

Pathfinder Sport, 20x2.0"

Inner Tubes

Schrader, 32mm valve


Crank Length 105/125mm
Handlebar Width 580mm
Stem Length 35mm
Saddle Width 130mm
Seatpost Length 280mm
Stack 398mm
Reach 295mm
Head-Tube Length 100mm
Head-Tube Angle 69°
B-B Height 229.5mm
B-B Drop 30mm
Trail 57mm
Fork Length (full) 305mm
Fork Rake/Offset 40mm
Front-Center 480mm
Chain-Stay Length 350mm
Wheelbase 828mm
Top-Tube Length (horizontal) 417mm
Bike Stand-Over Height 510mm
Seat-Tube Length 290mm
Seat-Tube Angle 73°
Due to continued shortages in the bicycle industry some components may be replaced with components of equal or higher value different than listed in specifications. We are working dilligently to update as changes are made by manufactures.
Due to continued shortages in the bicycle industry some components may be replaced with components of equal or higher value different than listed in specifications. We are working dilligently to update as changes are made by manufactures.