
Velopedia Bicycle Archive
2006 Giant MTX 125 Girls
Juvenile mountain bike, suspension bicycle from the Velopedia specification archive.
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- Original MSRP
- $220.00
- Sizes
- 20" Wheel
- Colors
- Purple
- Archive ID
- 94643
Current market
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Velopedia analysis
What the specifications mean
The fork provides the documented suspension, so fork setup and rear-tire pressure are the main adjustments for balancing the two ends of the bike. The 200% cassette range describes the available gearing more clearly than the component-group name alone. With rim brakes, the wheel’s braking surface is part of the system, so rim wear matters alongside pads and cables.
Used-bike inspection
If you’re buying this bike used
Before any test ride: both brakes should stop the bike firmly and release cleanly; both wheels should run true and be securely attached; tires should have no casing damage; and the headset, handlebar, stem, cranks and pedals should have no looseness or play.
Follow the full used-bike inspection order →- FrameLook closely for dents and hairline cracks around welds, the head tube and bottom-bracket area. Cosmetic scratches matter less than a change in shape or a crack line.Inspect the frame and fork →
- BrakesInspect pad condition, cable movement and the rim sidewalls or brake tracks for wear. A concave or heavily worn braking surface can mean the wheel also needs replacement.Inspect the brakes →
- SuspensionAsk when the fork was last serviced. Check the stanchions for damage, look for oil at the seals and make sure the fork moves smoothly without bushing play.Evaluate the suspension →
- DrivetrainShift through every gear under light load and measure chain wear. Confirm that the shifter, derailleur, chain and cassette belong to the same 7-speed system.Check drivetrain wear →
- Wheels & tiresSpin both wheels and watch the rims for side-to-side or vertical movement. Check for dents, cracks, loose or uneven spokes and hub play, then inspect both tire casings for cuts, cracking or exposed threads.Check wheels and tires →
Bike-specific inspection checklist 18 checks based on 5 archived component groups Open checklistClose checklist
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.
Identity and fit
Follow the full used-bike inspection order →Archived: 2006 Giant MTX 125 Girls · Juvenile mountain bike, suspension · Published sizes: 20" Wheel
Frame and fork
Inspect the frame and fork →Archived: Frame: TIG-welded · Fork: · Chromoly
Drivetrain
Check drivetrain wear →Archived: Group: Juvenile Mix · Shifters: SRAM MRX · Rear derailleur: Shimano Tourney · Crankset: 3-piece aluminum, 40 teeth · Rear cogs: 7-speed, 14 - 28 teeth · Chain: KMC Z51
Brakes
Inspect the brakes →Archived: Brakes: Aluminum linear-pull brakes, aluminum levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 20" wheels · Rims: Aluminum, 36-hole · Hubs: Aluminum, nutted · Front tire: 20 x 2.00" dual sport
Controls and contact points
Archived: Handlebar: Aluminum, 1" rise · Stem: Aluminum · Seatpost: Aluminum, 30.8mm diameter · Saddle: Variable Density Comfort · Pedals: Resin platform
Before and during the test ride
Follow the full used-bike inspection order →Interpretation based on the archived manufacturer specifications. Confirm exact fit and standards before ordering parts or performing service.
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Frameset
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | ALUXX aluminum |
| Fork Material | Chromoly |
Drivetrain
| Component Group | Juvenile Mix |
|---|---|
| Shifters | SRAM MRX |
| Front Derailleur | N/A |
| Rear Derailleur | Shimano Tourney |
| Crankset | 3-piece aluminum, 40 teeth |
| Rear Cogs | 7-speed, 14 - 28 teeth |
| Chain | KMC Z51 |
| Pedals | Resin platform |
Brakes
| Brakes | Aluminum linear-pull brakes, aluminum levers |
|---|
Cockpit & Contact Points
| Handlebar | Aluminum, 1" rise |
|---|---|
| Stem | Aluminum |
| Saddle | Variable Density Comfort |
| Seatpost | Aluminum, 30.8mm diameter |
Wheels & Tires
| Hubs | Aluminum, nutted |
|---|---|
| Rims | Aluminum, 36-hole |
| Spokes | 14ga. (2.0mm) |
| Front Tire | 20 x 2.00" dual sport |
| Wheel Size | 20" wheels |
Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.




