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Specialized Jett 20 Single Speed

Specialized Jett 20 Single Speed
  • Color: Gloss Cobalt/Ice Blue
  • Color: Gloss Flo Red/White
  • Color: Gloss Oasis/Forest Green
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Kids move fast, and grow faster. At times, it can seem like there's a small window for the perfect bike fit. The right bike for a young rider is a delicate balance between too small, too big, and a short-lived just right. If we're going to inspire the next generation of riders, we need to keep kids comfortably riding longer.

The Jett is designed so that you'll never fear the growth spurts. We did our homework to understand how kids grow—spoiler alert, kids' arms and legs grow more rapidly than their torso. We took to the books and designed a bike with child-specific touch points that withstand the development of young riders. The Jett is uniquely adjustable, perfectly proportional, and child-liftable-you'll always be set to Jett.

The Jett Single Speed features an adjustable handlebar that allows kids to fine tune reach as their arms grow. The narrower saddle and grips were informed by a Retul study on kids to be the appropriately size—with handbrakes on both the 16" and 20". And what's more, we designed the frame and reviewed every component to make the Jett one of the lightest bikes on the market. You're going to have to beg them to get off this bike.

- We designed the Jett Single Speed to be uniquely adjustable with longer seatposts and adjustable handlebars so kids can dial-in the perfect riding position as they grow.

- Every detail of the Jett Single Speed—including the 130mm Bridge saddle, narrower-diameter grips, and short-reach, tool-less adjustable brake levers—was informed by Retul data from a kids' research group to be perfectly proportional for young riders.

- A lightweight bike is simply more fun and the Jett Single Speed's all-new A1 aluminum frame, alloy fork, Pathfinder tires, and single-speed drivetrain make it one of the lightest kids' bikes on the market.

bike frame with labeled dimensions
Bike Sizes:
B. Stack 398mm
C. Standover 510mm
D. Effective Top Tube 417mm
F. Head Tube Length 100mm
H. Seat Tube Length 290mm
J. Bottom Bracket Drop 30mm
K. Fork Rake/Offset 40mm
Crank Length 115mm
Handlebar Width 580mm
Saddle Width 130mm


Frame A1 Premium Butted Alloy, unisex frame, internal cable routing, 110x10mm dropouts
Fork A1 Premium Butted Alloy, Alloy steerer, V-Brake
Rims Alloy, 14mm Depth, 23mm Internal Width, 28H
Hubs Front: Alloy, Loose Ball Bearings, Bolt type, 100mm Spacing, 28H
Rear: Alloy, Loose Ball Bearings, Bolt type, 110mm Spacing, 28H
Spokes Stainless, 14g
Tires Pathfinder Sport, 20 x 2.0"
Bottom Bracket Square taper, Plastic cups, 113mm spindle
Crankset Forged Alloy, Square Taper, Single Speed, w/ Chainguard
Chainrings 34T
Cassette/Freewheel 18T Freewheel
Chain KMC Z1 EPT (Anti-Rust)
Brakes V-brake w/ tool-less reach adjust brake lever
Handlebars Alloy Mini Rise, Double Butted, 60mm Rise, 5-degree Backsweep, 580mm Width, 25.4mm Clamp Diameter, 19mm Bar End Diameter
Tape/Grips Jett Body Geometry, 19mm Internal Diameter, lock-on
Stem 3D Forged Aluminum, 35mm length, 6 degree rise, 25.4mm clamp diameter
Seatpost Alloy, 2-bolt, 14mm offset, 27.2mm, 280mm length
Saddle Kids Bridge Saddle, 130mm
Pedals Nylon platform w/ reflectors

* Subject to change without notice.


Specialized Jett Kids Bike Review by Two Wheeling Tots

“The Specialized Jett is a super comfortable and efficient machine that is an excellent choice for city riding. Offering the comfort and smooth riding of a cruiser style bike mixed with the technical brawn of a mountain bike, the Jett easily tackles everything from longer paved rides with the family to cruising around the neighborhood with friends. Every one of our kid testers raved about how comfortable the Jett was.”

Part Numbers

Option UPC MPN Store SKU
Gloss Cobalt/Ice Blue 888818734634 92722-3020 210000043208
Gloss Flo Red/White 888818734573 92722-3120 210000043209
Gloss Oasis/Forest Green 888818734535 92722-3220 210000043215