Jamis XR20

2021 YouthGeneral youth Manufacturer page

Last known price: $439

Prices shown first for United States
Suspension: Rigid
Wheels: 20″
Drivetrain: 1 × 6 36t / 14–28t
Gear range: 200%
Weight: 10.89 kg 24.0 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Rim brake

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

7 of 18 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

Enduro frame design, 6061 aluminum tubes, tapered/ ovalized top tube, down tube & stays Not identified

Suspension

1 part

Fork

Unicrown, hi-tensile steel, 28.6 steerer Not identified

Drivetrain

6 parts

Bottom bracket

Sealed cartridge Not identified
Cassette

6-speed, 14-28T Not identified
Chain
- KMC
Crankset

Forged alloy crank, 127mm, with 36T chainring and protective double-sided chainguard Not identified
Rear derailleur
- Shimano Tourney RD-TY300 7 speeds
RD-TY300
Shifters
- Shimano

Brakes

1 part

Brakes
- Tektro

Wheels and tires

2 parts

Rims

Alloy 36H black anodized rims with brushed brake tracks, alloy MTB hubs with nutted axles, 14G black electroplated spokes Not identified
Tires
- CST

Cockpit and contact points

7 parts

Grips

Kraton for Grip Shift Not identified
Handlebar

MTB alloy riser, 6 ̊ sweep x 20mm rise x 560mm wide Not identified
Headset

Aheadset, 1 1/8” Not identified
Pedals

MTB platform, hi-impact resin Not identified
Saddle
- Jamis
Seatpost
- Pillar
Stem

MTB alloy threadless, 15 ̊ rise x 60mm extension Not identified

Sizes and geometry

1 size Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size 11"

Table

Geometry diagram unavailable

The drawing needs reach and stack, which the manufacturer did not publish. Available facts remain in the table.

Size

Complete manufacturer geometry table 1 published size

Complete manufacturer geometry by size
Measurement
Top tube lengthmm	455
Seat tube lengthmm	279
Head tube lengthmm	90
Head tube angle	70°
Seat tube angle	70°
Chainstay lengthmm	385
Wheelbasemm	882
Bottom bracket heightmm	240
Standover heightmm	516
Fork rakemm	45

Not published by the manufacturer: Reach, Stack, Front center, Bottom bracket drop, Trail, Stack/reach ratio, Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Fork material: Steel
Bicycle weight: 10.89 kg

24.0 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 36
Largest chainring: 36
Rear sprockets: 6
Smallest sprocket: 14
Largest sprocket: 28
Lowest gear: 25.7 in
Highest gear: 51.4 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 1.95″
Travel: Front: Additional specification: Not available: Yes
Wheel material: Aluminum
Wheel size: 20″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 9.8 km/h
Highest gear: 19.7 km/h

Total gear range 200%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.