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2021 Jamis

XR20

A 20″ aluminum frame general youth bike with mid-range components and tektro rim brakes.

Manufacturer Price

$439
Weight10.9 kg  
FrameAluminum
SuspensionRigid
ForkSteel
Wheels20″ Aluminum
Drivetrain1 × 6
GroupsetTourney
BrakesTektro Rim
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Insights
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

25 km/h

XR20

28 km/h

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Highest gear

(descending)

Geometry
Specs
Build
Frame

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

Fork

Unicrown, hi-tensile steel, 28.6 steerer

Bottom Bracket

Sealed cartridge

Headset

Aheadset, 1 1/8”

Stem

MTB alloy threadless, 15 ̊ rise x 60mm extension

Handlebar

MTB alloy riser, 6 ̊ sweep x 20mm rise x 560mm wide

Saddle

Jamis ATB Youth

Seatpost

Alloy pillar, 27.2 x 300mm, with 31.8mm alloy clamp

TypeRigid

Pedals

MTB platform, hi-impact resin

Grips

Kraton for Grip Shift

Groupset
Rear Derailleur

Shimano TY300 rear with protective guard

Crank

Forged alloy crank, 127mm, with 36T chainring and protective double-sided chainguard

Shifters

Shimano RevoShift 35, 6-speed

Cassette

6-speed, 14-28T

Chain

KMC Z33

Brakes

Alloy linear pull type with Tektro youth specific levers

TypeTektro Rim

Wheels
Rims

Alloy 36H black anodized rims with brushed brake tracks, alloy MTB hubs with nutted axles, 14G black electroplated spokes

Tires

CST MTB, 20 x 1.95”

Rider Notes
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First added 29 April

Last updated 29 October

Not listed for 1,308 days