GT Stomper FS Ace

Name: GT Stomper FS Ace
Brand: GT

2025 YouthMountain youth Manufacturer page

Last known price: $1,500

Prices shown first for United States
Travel: 130 / 120 mm Fork / rear shock
Wheels: 26″
Drivetrain: 1 × 10 30t / 11–48t
Gear range: 436%
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

One Size

The manufacturer did not publish rider heights for these sizes.

Components

17 of 21 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

Stomper FS 26* Frame, 120mm Travel, BSA 73mm, Tapered Head Tube, Boost 12×148mm Thru-Axle, SRAM UDH, 190×42.5mm Shock Mount Not identified

Suspension

2 parts

Drivetrain

6 parts

Bottom bracket

Cartridge, square taper Not identified
Cassette
- microSHIFT Advent X
Chain
- KMC X10 10 speeds
Crankset
- Prowheel 30t
Rear derailleur
- microSHIFT Advent X
Shifters
- microSHIFT Advent X

Brakes

1 part

Brakes

Hydraulic Disc Brake Not identified

Wheels and tires

4 parts

Cockpit and contact points

7 parts

Grips
- GT
Handlebar

Steel Riser Bar, 20mm Rise, 600mm Not identified
Headset
- FSA
Pedals
- GT
Saddle
- WTB Silverado
Seatpost
- Tranz-X
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
Frame
Head tube angle	65°
Seat tube angle	76.5°
Bottom bracket dropmm	0.7
Fork rakemm	4.6
Stack/reach ratio	1.61
Suspension and parts
Stem lengthmm	40

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, Front travel, Rear travel, Crank length, Handlebar width, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum

Suspension

Suspension configuration: Full suspension
Front travel: 130 mm
Rear travel: 120 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 30
Largest chainring: 30
Rear sprockets: 10
Smallest sprocket: 11
Largest sprocket: 48
Lowest gear: 16.3 in
Highest gear: 70.9 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Derailleur hanger: UDH
Seatpost: Dropper seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Fork spring: Air
Tire width: 2.3″
Wheel material: Aluminum
Wheel size: 26″

Technical analysis

3 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

16.3 gear inches

This value is within the central range for this class.

Cohort: Youth / Mountain youth Model year: 2025
Sample: 257 bicycles with this information
Coverage: 70.0% of the class

Highest gear

70.9 gear inches

This value is within the central range for this class.

Cohort: Youth / Mountain youth Model year: 2025
Sample: 257 bicycles with this information
Coverage: 70.0% of the class

Shifting

Mechanical

10 of 367 bicycles with this information use electronic shifting.

Cohort: Youth / Mountain youth Model year: 2025
Sample: 367 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.2 km/h
Highest gear: 27.2 km/h

Total gear range 436%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 16.3–70.9 gear inches
Class reference (p10–p90): 14.0–80.0 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Youth / Mountain youth Model year: 2025
Lowest gear: 257 bicycles with this information, 70.0% of the class
Highest gear: 257 bicycles with this information, 70.0% of the class

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 2025 builds
Specification	This bicycle GT Stomper FS Ace	GT Stomper Ace 24	GT Stomper Ace 26
Suspension
Suspension configuration	Full suspension	Hardtail	Hardtail
Front travel	130 mm	50 mm	100 mm
Rear travel	120 mm	Not informed	Not informed
Drivetrain
Rear sprockets	10	8	8
Largest sprocket	48	34	34
Lowest gear	16.3 in	21.2 in	22.9 in
Highest gear	70.9 in	65.5 in	70.9 in
Brakes
Brake type	Hydraulic disc	Mechanical disc	Mechanical disc
Cockpit
Derailleur hanger	UDH	Not informed	Not informed
Seatpost	Dropper seatpost	Rigid seatpost	Rigid seatpost
Other specifications
Bottom bracket standard	BSA	Not informed	Not informed
Fork spring	Air	Coil	Coil
Suspension	Full suspension	Hardtail	Hardtail
Tire width	2.3″	2.1″	2.1″
Wheel size	26″	24″	26″