GT Performer 18

Name: GT Performer 18
Brand: GT

2026 YouthGeneral youth Manufacturer page

Last known price: $350

Prices shown first for United States
Suspension: Rigid
Wheels: 18″
Frame: Steel
Brakes: Rim brake

Sizes

Size guide

One Size

The manufacturer did not publish rider heights for these sizes.

Components

8 of 20 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

100% Hi-Ten Steel Tubes, DT Gusset, Mid BB, Seat Stay U-Brake, Integrated 1-1/8" H/T, Removable Rotor Tabs Not identified

Suspension

1 part

Fork

100% Hi-Ten, 25mm Offset Not identified

Drivetrain

4 parts

Bottom bracket

Sealed Mid 19mm Not identified
Cassette

9T 1pc. Driver Not identified
Chain
- KMC S1 1 speed
Crankset
- GT 25t

Brakes

2 parts

Brake levers

NBS Mini Alloy Not identified
Brakes

NBS Alloy U-Brake w/ Soft Compound Pad Not identified

Wheels and tires

5 parts

Front hub

Steel Loose Ball 3/8" Axle Not identified
Rear hub

Alloy Semi-Sealed 14mm Cassette Not identified
Rims

Alloy Single Wall, 20h Not identified
Spokes

Stainless Steel, 14g Not identified
Tires
- GT

Cockpit and contact points

7 parts

Grips
- GT
Handlebar
- GT
Headset

1-1/8" Sealed Integrated (41.8 x 45) Not identified
Pedals
- GT
Saddle
- GT
Seatpost

Combo Alloy, 25.4mm x 200mm Not identified
Stem
- GT

Sizes and geometry

1 size Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size One Size

Table

Geometry diagram unavailable

The drawing needs wheelbase, reach, stack, head tube length, seat tube length and chainstay length, which the manufacturer did not publish. Available facts remain in the table.

Size

Complete manufacturer geometry table 1 published size

Complete manufacturer geometry by size
Measurement
Head tube angle	75°
Seat tube angle	71°
Bottom bracket dropmm	10.26
Fork rakemm	1.22

Not published by the manufacturer: Reach, Stack, Top tube length, Seat tube length, Head tube length, Chainstay length, Wheelbase, Front center, Bottom bracket height, Standover height, Trail, Stack/reach ratio, Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Steel
Fork material: Steel

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 25
Largest chainring: 25

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 2.4″
Wheel material: Aluminum
Wheel size: 18″

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2026 builds
Specification	This bicycle GT Performer 18	GT Performer 16	GT Performer 21 Dirtlip	GT Performer 29	GT Performer Balance 12
Drivetrain
Front chainrings	1	1	1	1	Not informed
Smallest chainring	25	25	25	33	Not informed
Largest chainring	25	25	25	33	Not informed
Rear sprockets	Not informed	Not informed	Not informed	1	Not informed
Smallest sprocket	Not informed	Not informed	Not informed	16	Not informed
Largest sprocket	Not informed	Not informed	Not informed	16	Not informed
Lowest gear	Not informed	Not informed	Not informed	59.8 in	Not informed
Highest gear	Not informed	Not informed	Not informed	59.8 in	Not informed
Brakes
Brake type	Rim brake	Rim brake	Rim brake	Rim brake	Not informed
Cockpit
Shifting	Mechanical	Mechanical	Mechanical	No shifting	No shifting
Other specifications
Tire width	2.4″	2.4″	2.35″	2.5″	2.25″
Wheel size	18″	16″	20″	29″	12″
Bottom bracket standard	Not informed	Not informed	Not informed	Not informed	BSA