Velopedia Bicycle Archive

1998 SE Racing Assassin

Original specifications: 20" wheels · 24.6 lb published weight · legacy reference geometry.

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At a glance

Archive #70895
Model year
1998
Category
BMX
Original MSRP
$319.00
Sizes
Pro
Colors
Chrome-plated, Satin Red
Weight
24.6 lb
Geometry
Legacy reference
In this record
23 specifications · original MSRP · geometry
Model history 2 other years

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Identification clues

1998 archived details

Published colors
Chrome-plated, Satin Red
Frame
4130 chromoly
Original equipment
N/A

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

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Original build4130 chromoly · 20" wheels

Manufacturer catalog

Published sizes and colors

1 size · 2 colors

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

Published sizes

Pro

Published colors

Chrome-platedSatin Red

Frameset

Frame ConstructionTIG-welded
Frame Material4130 chromoly
ForkSE Racing Landing Gear
Fork Material4130 chromoly, unicrown crown

Drivetrain

Crankset1-piece chromoly 180mm, 44 teeth
Bottom BracketYST BB 621 AW
BB Shell Width68mm Threadless
Rear Cogs1-speed, 16 teeth
ChainKMC 408CP, 1/2 x 3/32"
PedalsWellgo LU-313

Brakes

BrakesChang Star VB-885AS brakes, Chang Star VL-189DT levers

Cockpit & Contact Points

Headset1 1/8" threadless Tioga
HandlebarSE Racing Rollbar
StemWei Hau MX 241
SaddleVelo VL-283
SeatpostKalloy SP-4130 micro-adjust, 26.0mm diameter

Wheels & Tires

HubsFormula OV 31
RimsAlex VP-20, 36-hole
SpokesTa Sen stainless steel, 2.0mm straight gauge
Spoke NipplesBrass nipples
Front Tire20 x 2.125" Kenda K-50 Comp III type
Rear Tire20 x 1.75" Kenda K-50 Comp III type
Wheel Size20" wheels

Geometry

Legacy reference · 5 measurements

Historical measurements. Frame size unknown.

All geometry measurementsLegacy reference · 5 measurements
MeasurementLegacy reference
Top tube508 mm
Head-tube angle74°
Seat-tube angle72°
Chainstay / rear center387.3 mm
Wheelbase939.8 mm

Frame size not recorded.

Gearing

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

RPM

RPM = pedal turns per minute.

Published build44T · 16T · 1-speed
Ratio2.75:1
Estimated speed At 90 RPM Gear14.4 mph

Rear tire: 20×1.75.

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.

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

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

Your gearing setup
Gears

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

Rear tire

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).

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.

Gear, dimension and cadence changes update results automatically.

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

Parts & serviceability

Find replacement parts

Original specifications
Front tire · Original
20 x 2.125" Kenda K-50 Comp III type
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Rear tire · Original
20 x 1.75" Kenda K-50 Comp III type
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Pedals · Original
Wellgo LU-313
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More parts (3)Fewer parts
Seatpost · Original
Kalloy SP-4130 micro-adjust

26.0mm diameter

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Rims · Original
Alex VP-20

36-hole

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Hubs · Original
Formula OV 31
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Parts and service referenceQuick reference before buying parts

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

Front tire
Front: 20 x 2.125" Kenda K-50 Comp III type, Rear: 20 x 1.75" Kenda K-50 Comp III type
Drivetrain
1-speed
Seatpost diameter
26 mm
Bottom bracket / shell
YST BB 621 AW · 68mm Threadless
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Equipment inspection checks 10 checks based on 5 archived component groups Open equipment checksClose equipment checks
0 of 10 checked Progress stays in this browser for this record.

Checks selected from the archived equipment. Confirm what is fitted today. This is not a complete safety inspection; use the full inspection guide before test riding.

Full used-bike inspection guide →

Frame and fork

Inspect the frame and fork →

Archived: Frame: TIG-welded · Fork: SE Racing Landing Gear · 4130 chromoly, unicrown crown

Drivetrain

Check drivetrain wear →

Archived: Crankset: 1-piece chromoly 180mm, 44 teeth · Bottom bracket: YST BB 621 AW · Rear cogs: 1-speed, 16 teeth · Chain: KMC 408CP, 1/2 x 3/32"

Brakes

Inspect the brakes →

Archived: Brakes: Chang Star VB-885AS brakes, Chang Star VL-189DT levers

Wheels and tires

Check wheels and tires →

Archived: Wheel size: 20" wheels · Rims: Alex VP-20, 36-hole · Hubs: Formula OV 31 · Front tire: Front: 20 x 2.125" Kenda K-50 Comp III type, Rear: 20 x 1.75" Kenda K-50 Comp III type

Controls and contact points

Archived: Headset: 1 1/8" threadless Tioga · Handlebar: SE Racing Rollbar · Stem: Wei Hau MX 241 · Seatpost: Kalloy SP-4130 micro-adjust, 26.0mm diameter · Saddle: Velo VL-283 · Pedals: Wellgo LU-313

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

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