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Jamis XR.20
  • Color: Charcoal
  • Color: Cosmo Blue
  • Color: Twilight

Jamis XR.20


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Product Details

2018 Jamis XR.20

Every Jamis youth bike uses size-specific items like grips, saddles and cranks that enhance
comfort and control by providing the best possible bike fit.
We focus on designing frames with low stand-over to take much of the awkwardness out of
getting on board and dismounting after.
We trim as much weight as we can with lightweight aluminum frames on many of the youth
models and use aluminum parts where possible (the limiting factor here is working within a
youth bike appropriate price point) to work towards that make-it-as-light-as-possible goal.


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  • Specifications close open

    Specification Description
    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”
    Rims 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”
    Crankset Forged alloy crank, 152mm, with 36T chainring and protective double-sided chainguard
    Bottom Bracket Cotterless type, 3B axle, 68 x 119mm (35-52-32)
    Chain KMC Z33
    Front Derailleur Shimano TX300 rear with protective guard
    Rear Derailleur Shimano TX300 rear with protective guard
    Cassette/Rear Cogs 6-speed, 14-28T
    Shifters Shimano RevoShift 35, 6-speed
    Handlebars MTB alloy riser, 6° sweep x 20mm rise x 560mm wide
    Tape/Grips Kraton for Grip Shift
    Stem MTB alloy threadless, 15° rise x 60mm extension
    Brakes Alloy linear pull type with full alloy short reach levers
    Pedals MTB platform, hi-impact resin
    Saddle XC MTB style
    Seat Post Alloy pillar, 27.2 x 300mm, with 31.8mm alloy clamp

    * Subject to change without notice.

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  • Part Numbers close open

    Option Manufacturer's Part Number
    Charcoal / 10x20 07-3554 CL
    Cosmo Blue / 10x20 07-3555 BL
    Twilight / 10x20 07-3556 TW
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