Velopedia Bicycle Archive

1997 Electra Bomber 4

Original specifications: Shimano Nexus drivetrain · 26" wheels.

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At a glance

Archive #69523
Model year
1997
Category
Cruiser
Original MSRP
$499.95
Sizes
18.5"
Colors
Fire red
In this record
24 specifications · original MSRP
Campaign
Original build4130 chromoly · Shimano Nexus · 26" wheels

Manufacturer catalog

Published sizes and colors

1 size · 1 color

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

Published sizes

18.5"

Published colors

Fire red

Frameset

Frame ConstructionTIG-welded
Frame Material4130 chromoly
ForkCS 800
Fork Material4130 chromoly, unicrown crown

Drivetrain

Component GroupShimano Nexus
ShiftersShimano Inter-4 ST-4S20
CranksetCyclone CPI 9-100A, 39 teeth
Bottom BracketShimano BB-CT91
BB Shell Width68mm English
Rear Cogs4-speed internal, 22 teeth
Chain1/2 x 1/8"
PedalsVictor VP-747

Brakes

BrakesShimano Nexus Roller brake/Tektro 873A front brakes, Tektro RBP-371AP levers

Cockpit & Contact Points

Headset1" steel
HandlebarAluminum
StemBMX 4-bolt aluminum
SaddleElectra
SeatpostKalloy aluminum, 26.8 mm diameter

Wheels & Tires

HubsFront: aluminum nutted, Rear: Shimano Nexus Roller brake
RimsElectra TA-8 aluminum, 36-hole
SpokesStainless steel, 2.0mm straight gauge
Spoke NipplesBrass nipples
Front Tire26 x 1.95" Electra Dirtgrabber
Wheel Size26" wheels

Gearing

Original gearing is incomplete. Enter your setup to calculate ratios and cadence speeds.

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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
26 x 1.95" Electra Dirtgrabber Replacement search: 26x1.95 bicycle tire Before ordering: Check rim type and tire clearance.
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Bottom bracket · Original
Shimano BB-CT91
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Shifters · Original
Shimano Inter-4 ST-4S20
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More parts (1)Fewer parts
Seatpost · Original
Kalloy aluminum

26.8 mm diameter

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Parts and service referenceQuick reference before buying parts

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

Front tire
26 x 1.95" Electra Dirtgrabber
Drivetrain
4-speed
Seatpost diameter
26.8 mm
Bottom bracket / shell
Shimano BB-CT91 · 68mm English
Campaign
Equipment inspection checks 10 checks based on 5 archived component groups Open equipment checksClose equipment checks
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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: CS 800 · 4130 chromoly, unicrown crown

Drivetrain

Check drivetrain wear →

Archived: Group: Shimano Nexus · Shifters: Shimano Inter-4 ST-4S20 · Crankset: Cyclone CPI 9-100A, 39 teeth · Bottom bracket: Shimano BB-CT91 · Rear cogs: 4-speed internal, 22 teeth · Chain: 1/2 x 1/8"

Brakes

Inspect the brakes →

Archived: Brakes: Shimano Nexus Roller brake/Tektro 873A front brakes, Tektro RBP-371AP levers

Wheels and tires

Check wheels and tires →

Archived: Wheel size: 26" wheels · Rims: Electra TA-8 aluminum, 36-hole · Hubs: Front: aluminum nutted, Rear: Shimano Nexus Roller brake · Front tire: 26 x 1.95" Electra Dirtgrabber

Controls and contact points

Archived: Headset: 1" steel · Handlebar: Aluminum · Stem: BMX 4-bolt aluminum · Seatpost: Kalloy aluminum, 26.8 mm diameter · Saddle: Electra · Pedals: Victor VP-747

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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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