Velopedia Bicycle Archive

2002 Diamondback Expert

Original specifications: Shimano Tiagra · 9-speed · mechanical rear derailleur · 700c wheels · legacy reference geometry.

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At a glance

Archive #91424

Model year: 2002
Category: Road
Original MSRP: $879.99
Sizes: Compact large, compact medium, compact small, compact xlarge
Colors: Red/White
Geometry: Legacy reference
In this record: 26 specifications · archived image · original MSRP · geometry

Model history 7 other years

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Identification clues

2002 archived details

Published colors: Red/White
Frame: 7005 aluminum w/replaceable derailleur hanger
Original equipment: Road Mix

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

Original build7005 aluminum w/replaceable derailleur hanger · Road Mix · 700c wheels

Manufacturer catalog

Published sizes and colors

4 sizes · 1 color

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

Published sizes

Compact largecompact mediumcompact smallcompact xlarge

Published colors

Red/White

Frameset

Frame Construction	TIG-welded
Frame Material	7005 aluminum w/replaceable derailleur hanger
Fork Material	Chromoly

Drivetrain

Component Group	Road Mix
Shifters	Shimano Tiagra STI Dual Control
Front Derailleur	Shimano Sora, bottom-pull/clamp-on 31.8mm
Rear Derailleur	Shimano Tiagra GS
Crankset	Shimano Tiagra Triple, 30/42/52 teeth
Bottom Bracket	Sealed cartridge, 113mm spindle
BB Shell Width	68mm English
Rear Cogs	9-speed, 12 - 23 teeth
Chain	KMC Z-9000, 1/2 x 3/32"
Pedals	Resin body, aluminum cage w/clips & straps

Brakes

Brakes	Aluminum Dual Pivot brakes, Shimano Tiagra STI Dual Control levers

Cockpit & Contact Points

Headset	1 1/8" integrated Tien Hsin No.10 ZST
Handlebar	Aluminum drop bar
Handlebar Extensions	Not included
Stem	Aluminum threadless
Saddle	Avenir Road SS
Seatpost	Aluminum micro-adjust, 27.2mm diameter

Wheels & Tires

Hubs	Equation Aero Road
Rims	Equation Alloy, 16-hole/20-hole
Spokes	Equation stainless steel, 14ga. (2.0mm) bladed
Spoke Nipples	Brass nipples
Front Tire	700 x 23c Michelin Axial Kevlar
Wheel Size	700c wheels

Geometry

Legacy reference · 6 measurements

Historical measurements. Frame size unknown.

All geometry measurementsLegacy reference · 6 measurements

Measurement	Legacy reference
Top tube	563.9 mm
Head-tube angle	73°
Seat-tube angle	72°
Chainstay / rear center	408.9 mm
Wheelbase	990.6 mm
Fork offset / rake	45 mm

Frame size not recorded.

Gearing

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

Pedal cadence

RPM

Speed units

RPM = pedal turns per minute.

Published build52/42/30T · 12–23T · 9-speed

Lowest1.30:1 Highest4.33:1 Total range332%

Estimated speed At 90 RPM Lowest gear9.2 mph Highest gear30.5 mph

Uses front tire 700C×23; 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

Front tire · Original

700 x 23c Michelin Axial Kevlar

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Retailer offers

Vittoria Rubino Pro G2.0 Clincher Tire Black, 700x23

700x23c

Replacement option

Competitive Cyclist ↗$41.10

Seatpost · Original

Aluminum micro-adjust

27.2mm diameter

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Retailer offers

Race Face Ride XC Seatpost Black, 27.2x375mm

Replacement option

Competitive Cyclist ↗$38.99

Backcountry ↗$38.99

Chain · Original

KMC Z-9000

1/2 x 3/32"

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More parts (3)Fewer parts

Crankset · Original

Shimano Tiagra Triple

30/42/52 teeth

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Rear derailleur · Original

Shimano Tiagra GS

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Shifters · Original

Shimano Tiagra STI Dual Control

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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: 700 x 23c Michelin Axial Kevlar
Drivetrain: 9-speed
Seatpost diameter: 27.2 mm
Bottom bracket / shell: Sealed cartridge, 113mm spindle · 68mm English

Equipment inspection checks 9 checks based on 5 archived component groups Open equipment checksClose equipment checks

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: · Chromoly

Look for dents or shape changes and inspect the edges of welds around the head tube, bottom bracket, seat cluster and suspension mounts for hairline cracks.

Drivetrain

Check drivetrain wear →

Archived: Group: Road Mix · Shifters: Shimano Tiagra STI Dual Control · Front derailleur: Shimano Sora, bottom-pull/clamp-on 31.8mm · Rear derailleur: Shimano Tiagra GS · Crankset: Shimano Tiagra Triple, 30/42/52 teeth · Bottom bracket: Sealed cartridge, 113mm spindle · Rear cogs: 9-speed, 12 - 23 teeth · Chain: KMC Z-9000, 1/2 x 3/32"

Shift through every available gear under light load. Hesitation, skipping or inconsistent indexing can reflect wear, damage, poor adjustment or mismatched replacement parts.
Measure chain wear with a compatible gauge and inspect chainring, cassette or freewheel teeth. A new chain does not rule out wear in the remaining drivetrain.
Turn the cranks slowly, feel for rough bearings and check for side-to-side play. Inspect crank arms, chainring bolts and pedal threads for looseness or damage.

Brakes

Inspect the brakes →

Archived: Brakes: Aluminum Dual Pivot brakes, Shimano Tiagra STI Dual Control levers

Inspect pads and braking surfaces, check the complete cable or hose path, and confirm both controls feel consistent and return cleanly.

Wheels and tires

Check wheels and tires →

Archived: Wheel size: 700c wheels · Rims: Equation Alloy, 16-hole/20-hole · Hubs: Equation Aero Road · Front tire: 700 x 23c Michelin Axial Kevlar

Spin both wheels and watch for side-to-side and vertical movement. Check spoke tension, rim condition and hub play.
Inspect both tire casings for cuts, cracking, plugs, bulges or exposed threads and confirm the installed sizes are safe for the rims and available frame and fork clearance.

Controls and contact points

Archived: Headset: 1 1/8" integrated Tien Hsin No.10 ZST · Handlebar: Aluminum drop bar · Stem: Aluminum threadless · Seatpost: Aluminum micro-adjust, 27.2mm diameter · Saddle: Avenir Road SS · Pedals: Resin body, aluminum cage w/clips & straps

Apply the front brake and rock the bike to check for headset play or notchiness. Inspect the stem, handlebar and clamp zones, then confirm every fastener and control is secure.
Check that the seatpost moves for adjustment and that the saddle, post and clamp hold securely without cracks, severe corrosion or damaged hardware.

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

2002 Diamondback Expert