Jamis Bikes

Kid's 2019 JUV XR.20 Bike


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Jamis' lightweight and durable aluminum XR.20 frame is easier to pedal than steel and features tapered and ovalized tubing to optimize frame strength and durability while offering the cool looks today's young riders appreciate.

A six-speed drivetrain is enough for any youngster to learn how to shift and master. It's also enough gearing to get around the neighborhood or park comfortably, which is why it has just one single chain ring in front: to simplify shifting.

A double-sided chain guard keeps the chain in place and clothes and legs out of the chain's way. There's a protective derailleur guard attached to the rear of the frame to protect the rear derailleur from knocks, keeping it in adjustment longer for greater safety and control.

A full alloy parts package -- including seat post, stem cap, crank arms, seat post clamp, brakes and rims reduces total bike weight and adds value.

The XR.20's XC saddle offers lots of high quality padding for comfort and control, with a narrow nose so that legs can pedal freely without chafing.


  • Frame - Enduro frame design, 6061 aluminum tubes, tapered/ovalized top tube, down tube & stays

  • Fork - Unicrown, 6061 aluminum, 28.6 Cr-Mo steerer

  • Headset - Aheadset, 1 1/8”

  • Wheels - Alloy 36H black anodized rims with brushed brake tracks, alloy MTB hubs with nutted axles, 14G nickel-plated spokes

  • Tires - CST MTB, 20 x 1.95”

  • Derailleurs - Shimano TX300 rear with protective guard

  • Shiftlevers - Shimano RevoShift 35, 6-speed

  • Chain - KMC Z33

  • Freewheel - 6-speed, 14-28T

  • Crankset - Forged alloy crank, 152mm, with 36T chainring and protective double-sided chainguard

  • BB Set - Sealed cartridge

  • Pedals - MTB platform, hi-impact resin

  • Brakeset - Alloy linear pull type with full alloy short reach levers

  • Handlebar - MTB alloy riser, 6° sweep x 20mm rise x 560mm wide

  • Stem - MTB alloy threadless, 15° rise x 60mm extension

  • Grips - Kraton for Grip Shift

  • Seatpost - Alloy pillar, 27.2 x 300mm, with 31.8mm alloy clamp

  • Saddle - Jamis MTB Youth

  • Sizes - 10”

  • Colors - Charcoal, Cosmo Blue, Twilight

  • Weight - 22.50 lbs

NOTICE: Some products in this store can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Please check the product label for warning information. For more information go to P65Warnings.ca.gov. We cannot ship any products into California that are affected by Proposition 65.

SHIPPING CHANGES: Due to new sales tax rules in the state of Colorado, effective June 1, 2019, purchases made online through JAX Mercantile for customers in the state of Colorado will only be able to be shipped to addresses within JAX current tax jurisdictions in Fort Collins, Loveland, Lafayette, and Broomfield. Customers in the state of Colorado who do not have shipping addresses within these zip codes may still opt for in-store pickup at any JAX store location when making a purchase on the JAX website. Learn more on our shipping and returns page.

Customer Service: 1-800-336-8314 Monday - Friday 9am to 5pm MTN