Velopedia Bicycle Archive

2000 Scorpio At-J20

Original specifications: Sunrace drivetrain · 20" wheels · 28.5 lb published weight.

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At a glance

Archive #90007

Model year: 2000
Category: Kids
Original MSRP: $150.00
Sizes: Boys 12", girls 12"
Colors: Honey Dew, Monarch Blue
Weight: 28.5 lb
In this record: 25 specifications · original MSRP

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Identification clues

2000 archived details

Published colors: Honey Dew, Monarch Blue
Frame: Hi-tensile steel
Original equipment: Sunrace

Clues, not proof of model year. Colors vary and components may have been replaced.

Original buildHi-tensile steel · Sunrace · 20" wheels

Manufacturer catalog

Published sizes and colors

2 sizes · 2 colors

Manufacturer-published sizes and colors; availability and exact size/color pairings may vary by market or production run.

Published sizes

Boys 12"girls 12"

Published colors

Honey DewMonarch Blue

Frameset

Frame Construction	TIG-welded
Frame Material	Hi-tensile steel
Fork	Pilot Lite Fork
Fork Material	4130 chromoly, unicrown crown

Drivetrain

Component Group	Sunrace
Shifters	Sunrace Turbo Shift
Rear Derailleur	Sunrace 525
Crankset	1-piece 5 1/2", 44 teeth
Bottom Bracket	One piece
Rear Cogs	6-speed, 14 - 28 teeth
Chain	KMC Z-51, 1/2 x 3/32"
Pedals	Resin

Brakes

Brakes	Aluminum cantilever brakes, alloy levers

Cockpit & Contact Points

Headset	1" steel
Handlebar	Steel hi-rise
Handlebar Extensions	Not included
Stem	Steel
Saddle	Pilot
Seatpost	Steel, 25.4mm diameter

Wheels & Tires

Hubs	Steel, nutted
Rims	Alex X-101, 36-hole
Spokes	Shuhn Lih UCP, 2.0mm straight gauge
Spoke Nipples	Brass nipples
Front Tire	20 x 2.10" Kenda K-850
Wheel Size	20" wheels

Gearing

Lower gears help on climbs. Higher gears suit higher speeds.

Pedal cadence

RPM

Speed units

RPM = pedal turns per minute.

Published build44T · 14–28T · 6-speed

Lowest1.57:1 Highest3.14:1 Total range200%

Estimated speed At 90 RPM Lowest gear8.5 mph Highest gear17.0 mph

Uses front tire 20×2.1; rear size isn’t listed.

How it works

Ratio = front teeth ÷ rear teeth. Hub gears also include the hub’s internal ratio. A 400% range means the highest ratio is four times the lowest.

Speeds are estimates from tire size and pedal cadence. Actual speeds vary.

Try other gearing

Try your current gearingChanged tires or gears? Calculate your setup.

Your changes apply to this calculation. The archived build stays unchanged.

Gears Drivetrain

Front teeth Smallest rear teeth Largest rear teeth

Use up to three front tooth counts, separated by /. For one rear sprocket, enter the same count twice.

Rear tire

Rear tire marking

Apply the marking on your rear tire or edit its dimensions below. Older or fractional inch sizes need the ISO marking (e.g. 37-590).

Rim diameter (BSD, mm) Tire width (mm)

For 32-622, width is 32 mm and rim diameter is 622 mm. Use the rear tire on mixed-wheel bikes. Leave both fields empty to compare ratios only.

Cadence (RPM) Speed units

Gear, dimension and cadence changes update results automatically.

Gearing comparison
Measure	Original	Your setup
Lowest ratio	—	—
Highest ratio	—	—
Total range	—	—
Lowest-gear speed	—	—
Highest-gear speed	—	—

Speeds are estimates. These calculations do not establish component compatibility or available tire clearance.

Parts & serviceability

Find replacement parts

Original specifications

Chain · Original

KMC Z-51

1/2 x 3/32"

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Front tire · Original

20 x 2.10" Kenda K-850 Replacement search: 20x2.1 bicycle tire Before ordering: Check rim type and tire clearance.

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Seatpost · Original

Steel

25.4mm diameter

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More parts (1)Fewer parts

Rims · Original

Alex X-101

36-hole

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Based on the original build. Check fit and installed parts before ordering. Affiliate links may earn Velopedia a commission. As an Amazon Associate I earn from qualifying purchases.

Parts and service referenceQuick reference before buying parts

Archived specifications for reference. Check the fitted parts before ordering.

Front tire: 20 x 2.10" Kenda K-850
Drivetrain: 6-speed
Seatpost diameter: 25.4 mm
Bottom bracket / shell: One piece

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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.

2000 Scorpio At-J20