Velopedia Bicycle Archive

2005 Giant Boulder SE

Original specifications: Shimano Acera · 7-speed · mechanical rear derailleur · 26" wheels.

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At a glance

Model year
2005
Category
Mountain
Sizes
12.5", 14", 17", 19", 21", 23", womens 14", womens 17", womens 19"
Colors
Crystal Blue, Silver Gray
In this record
27 specifications · archived image
Archive ID
93747
Model history 8 other years
Original buildAluxx aluminum · Mountain Mix · 26" wheels

Manufacturer catalog

Published sizes and colors

9 sizes · 2 colors

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

Published sizes

12.5"14"17"19"21"23"womens 14"womens 17"womens 19"

Published colors

Crystal BlueSilver Gray

Frameset

Frame ConstructionTIG-welded
Frame MaterialAluxx aluminum
ForkSR Suntour XC60, 75mm travel
Fork MaterialAluminum/magnesium, single crown

Drivetrain

Component GroupMountain Mix
ShiftersShimano ST-EF29 EZ Fire STI
Front DerailleurShimano FD-C102
Rear DerailleurShimano Acera
CranksetSuntour GI100, 28/38/48 teeth
Bottom BracketTH BB-7400, 121.5mm spindle
BB Shell Width68mm English
Rear Cogs7-speed, 14 - 34 teeth
ChainKMC Z51, 1/2 x 3/32"
PedalsNylon platform

Brakes

BrakesAluminum linear-pull brakes, Shimano ST-EF29 EZ Fire STI levers

Cockpit & Contact Points

Headset1 1/8" threadless Aheadset
HandlebarAluminum
Handlebar ExtensionsNot included
StemAluminum
SaddleGiant Groove Plus
SeatpostAluminum micro-adjust, 30.9mm diameter

Wheels & Tires

HubsAluminum
RimsAluminum, 36-hole
SpokesStainless steel, 14ga. (2.0mm) straight gauge
Spoke NipplesBrass nipples
Front Tire26 x 2.10" all-terrain
Wheel Size26" wheels

Gearing

Chainring ÷ rear sprocket

Lower ratios provide more mechanical advantage for climbing. Higher ratios turn the rear wheel farther with each crank revolution.

Published build48/38/28T · 14–34T · 7-speed
Lowest0.82:1 Highest3.43:1 Total range416%
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Parts & serviceability

Find replacement parts

Original specifications
Chain · Original
KMC Z51, 1/2 x 3/32"
Brake pads · Original
Aluminum linear-pull brakes, Shimano ST-EF29 EZ Fire STI levers
Front derailleur · Original
Shimano FD-C102
More parts (3)
Rear derailleur · Original
Shimano Acera Search: Shimano Acera 7-speed mechanical rear derailleur
Shifters · Original
Shimano ST-EF29 EZ Fire STI
Seatpost · Original
Aluminum micro-adjust, 30.9mm diameter

Based on the original build. Confirm the model, size and fit before ordering; installed parts may differ. As an Amazon Associate I earn from qualifying purchases. Velopedia may also earn from qualifying eBay purchases.

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Bike-specific inspection checklist 20 checks based on 6 archived component groups Open checklistClose checklist
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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: 2005 Giant Boulder SE · Mountain bike, front suspension · Published sizes: 12.5", 14", 17", 19", 21", 23", womens 14", womens 17", womens 19"

Archived: Frame: TIG-welded · Fork: SR Suntour XC60, 75mm travel · Aluminum/magnesium, single crown

Archived: Fork: SR Suntour XC60, 75mm travel

Archived: Group: Mountain Mix · Shifters: Shimano ST-EF29 EZ Fire STI · Front derailleur: Shimano FD-C102 · Rear derailleur: Shimano Acera · Crankset: Suntour GI100, 28/38/48 teeth · Bottom bracket: TH BB-7400, 121.5mm spindle · Rear cogs: 7-speed, 14 - 34 teeth · Chain: KMC Z51, 1/2 x 3/32"

Archived: Brakes: Aluminum linear-pull brakes, Shimano ST-EF29 EZ Fire STI levers

Archived: Wheel size: 26" wheels · Rims: Aluminum, 36-hole · Hubs: Aluminum · Front tire: 26 x 2.10" all-terrain

Controls and contact points

Archived: Headset: 1 1/8" threadless Aheadset · Handlebar: Aluminum · Stem: Aluminum · Seatpost: Aluminum micro-adjust, 30.9mm diameter · Saddle: Giant Groove Plus · Pedals: Nylon platform

Before and during the test ride

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Market Snapshot

Checked Oct 8, 2026

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Model-family used asking$200.00Median asking · limited sample · 3 listings

Asking prices, not completed sales. Shipping and tax excluded.

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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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