Velopedia Bicycle Archive

1999 Specialized Fatboy Hemi MX

Original specifications: N/A drivetrain · 20" wheels · legacy reference geometry.

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At a glance

Model year
1999
Category
BMX
Original MSRP
$329.99
Sizes
Pro XL
Colors
Mirror Blue
Geometry
Legacy reference
In this record
22 specifications · original MSRP · geometry
Archive ID
85750
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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

Pro XL

Published colors

Mirror Blue

Frameset

Frame ConstructionMonocoque
Frame Material4130 chromoly
ForkSpecialized
Fork MaterialChromoly, unicrown crown

Drivetrain

CranksetSpecialized StrongArm 3-piece chromoly, 44 teeth
Bottom BracketSpecialized chromoly
BB Shell WidthAmerican
Rear Cogs1-speed, 16 teeth
ChainKMC, 1/2 x 3/32"
PedalsSpecialized platform, aluminum

Brakes

BrakesTektro 912A rear brakes, Tektro 314A rear levers

Cockpit & Contact Points

Headset1 1/8" threadless Tange-Seiki Aheadset
HandlebarPro Design chromoly
StemSpecialized aluminum
SaddleSpecialized Race
SeatpostSpecialized aluminum, 26.0mm diameter

Wheels & Tires

HubsSpecialized alloy
RimsAlex aluminum, 36-hole
SpokesSpecialized UCP, 2.0mm straight gauge
Spoke NipplesBrass nipples
Front TireFront: 20 x 2.125" Specialized Spanky Team, Rear: 20 x 1.85" Specialized Spanky Team
Wheel Size20" wheels

Historical reference geometry

Geometry

Legacy reference · 5 measurements

This historical geometry describes the model, but the original source does not identify its frame size. Use it as a period reference, not a size-specific fit comparison.

MeasurementLegacy reference
Top tube514.4 mm
Head-tube angle74°
Seat-tube angle71°
Chainstay / rear center393.7 mm
Fork offset / rake25.4 mm

The preserved source contains one model-level geometry set without an identified frame size.

Parts & serviceability

Find replacement parts

3 top part searches
SaddleQualified part search
Specialized Race Named archived component — verify exact version
CranksetQualified part search
Specialized StrongArm 3-piece chromoly, 44 teeth Named archived component — verify exact version
SeatpostMatching fit standard
26 mm seatpost Published diameter — verify length and setback

Searches use the archived manufacturer specification, not the components currently installed on a particular bicycle. Confirm the exact model, size and fit before ordering. As an Amazon Associate I earn from qualifying purchases. Velopedia may also earn from qualifying eBay purchases. Commercial relationships do not influence Archive specifications or analysis.

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Bike-specific inspection checklist 19 checks based on 5 archived component groups Open checklistClose checklist
0 of 19 checked Progress stays in this browser for this bike.

This checklist uses the archived equipment for this bike. It cannot confirm the condition, service history or later component changes of the example in front of you.

Archived: 1999 Specialized Fatboy Hemi MX · BMX · Published sizes: Pro XL

Archived: Frame: Monocoque · Fork: Specialized · Chromoly, unicrown crown

Archived: Crankset: Specialized StrongArm 3-piece chromoly, 44 teeth · Bottom bracket: Specialized chromoly · Rear cogs: 1-speed, 16 teeth · Chain: KMC, 1/2 x 3/32"

Archived: Brakes: Tektro 912A rear brakes, Tektro 314A rear levers

Archived: Wheel size: 20" wheels · Rims: Alex aluminum, 36-hole · Hubs: Specialized alloy · Front tire: Front: 20 x 2.125" Specialized Spanky Team, Rear: 20 x 1.85" Specialized Spanky Team

Controls and contact points

Archived: Headset: 1 1/8" threadless Tange-Seiki Aheadset · Handlebar: Pro Design chromoly · Stem: Specialized aluminum · Seatpost: Specialized aluminum, 26.0mm diameter · Saddle: Specialized Race · Pedals: Specialized platform, aluminum

Before and during the test ride

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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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