Velopedia Bicycle Archive

2011 GT Slammer

Original manufacturer specifications including BMX Mix drivetrain, 20" wheels.

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What Velopedia knows

Model year
2011
Category
BMX
Colors
White, Yellow
Record coverage
26 preserved details · 2 archived images
Archive ID
25115
Model history 3 other years

Historical catalog variants

Archived sizes and colors

2 item records

Item-level catalog entries recovered from Velopedia’s original bicycle archive. They document how this model was listed historically; they do not identify the frame size associated with legacy reference geometry or indicate current availability.

Published colors

WhiteYellow
View 2 archived size/color combinations
SizeColor
—White
—Yellow

Historical catalog evidence. Exact specifications and naming may vary by market, production run or manufacturer revision.

Frameset

Frame ConstructionSteel
Frame MaterialSteel
ForkGT Freestyle
Rear ShockN/A

Drivetrain

Component GroupBMX Mix
CranksetForged steel, 33T teeth
Bottom BracketLoose ball
CassetteDnp
Rear Cogs13 teeth
ChainKMC Z510
PedalsGT Jump design

Brakes

BrakesRush 900D front/Rush 933D rear brakes, Tektro 289A levers

Cockpit & Contact Points

Headset1 1/8" Threadless
HandlebarGT dirt/street steel
Handlebar ExtensionsNot included
StemGT freestyle drop
SaddleGT Slim Mini Street
SeatpostSteel, 25.4mm diameter

Wheels & Tires

HubsSteel
RimsAlex G303, 32-hole/36-hole
Spokes14ga. (2.0mm)
Spoke NipplesBrass
Front Tire20 x 2.1" GT Air Bags
Wheel Size20" wheels

Parts & serviceability

Find replacement parts

1 top part search
SeatpostMatching fit standard
25.4 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. Velopedia may also earn from qualifying retailer purchases. Commercial relationships do not influence Archive specifications or analysis.

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 →
  • FrameCheck paint chips, vent holes and the inside of the seat tube for corrosion. Also look for dents, bent tubes and cracking around welded or brazed joints.Inspect the frame and fork →
  • BrakesTest each brake separately and confirm it stops firmly and releases cleanly. Inspect the pads and braking surfaces for wear or contamination, and check the cables or hoses for damage.Inspect the brakes →
  • DrivetrainShift through the full range under light load, measure chain wear and inspect the cassette or freewheel teeth. Skipping or hesitation can indicate wear, poor adjustment or mismatched parts.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
0 of 18 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: 2011 GT Slammer · BMX

Archived: Frame: Steel · Fork: GT Freestyle

Archived: Group: BMX Mix · Crankset: Forged steel, 33T teeth · Bottom bracket: Loose ball · Cassette: DNP · Rear cogs: 13 teeth · Chain: KMC Z510

Archived: Brakes: Rush 900D front/Rush 933D rear brakes, Tektro 289A levers

Archived: Wheel size: 20" wheels · Rims: Alex G303, 32-hole/36-hole · Hubs: Steel · Front tire: 20 x 2.1" GT Air Bags

Controls and contact points

Archived: Headset: 1 1/8" Threadless · Handlebar: GT dirt/street steel · Stem: GT freestyle drop · Seatpost: Steel, 25.4mm diameter · Saddle: GT Slim Mini Street · Pedals: GT Jump design

Before and during the test ride

Follow the full used-bike inspection order →

Build relationships are limited to the archived manufacturer specifications. Confirm exact fit and standards before ordering parts or performing service.

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Gallery

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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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