Trek Top Fuel 9.8 GX AXS

Name: Trek Top Fuel 9.8 GX AXS
Brand: Trek

2021 MountainTrail Manufacturer page

Trek Top Fuel 9.8 GX AXS, color Carbon Blue Smoke / Radioactive Coral

Price: Not published

Prices shown first for United States
Europe: €7,299 Last known price
Travel: 120 / 115 mm Fork / rear shock
Wheels: 29″
Drivetrain: 1 × 12 32t / 10–52t
Gear range: 520%
Weight: 11.88 kg 26.2 lb · Reference configuration not specified
Frame: Carbon
Brakes: Hydraulic disc

Sizes

Size guide

17.5" High
17.5" Low
18.5" High
18.5" Low

The manufacturer did not publish rider heights for these sizes.

Components

18 of 19 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.

Suspension

2 parts

Drivetrain

6 parts

Brakes

2 parts

Wheels and tires

3 parts

Cockpit and contact points

6 parts

Grips
- Bontrager
Handlebar
- Bontrager
Headset

Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom Not identified
Saddle
- Bontrager
Seatpost
- Bontrager
Stem
- Bontrager

Sizes and geometry

4 sizes Open in the geometry plotter

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

Size 17.5" Low

Table

Reach 440mm

Stack 594mm

Wheelbase 1152mm

Head angle 67.5°

Seat angle 75.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 29″ wheel; exact published values are in the table below.

Size Reach Stack

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	445	440	461	456
Stackmm	590	594	590	594
Top tube lengthmm	598	599	614	615
Seat tube lengthmm	419	419	445	445
Head tube lengthmm	90	90	90	90
Head tube angle	68°	67.5°	68°	67.5°
Seat tube angle	75.5°	75°	75.5°	75°
Chainstay lengthmm	434	435	434	435
Wheelbasemm	1152	1152	1168	1168
Front centermm	720	719	736	735
Bottom bracket dropmm	30	36	30	36
Bottom bracket heightmm	343	337	343	337
Standover heightmm	736	730	741	735
Fork rakemm	44	44	44	44
Trailmm	103	107	103	107
Stack/reach ratio	1.33	1.35	1.28	1.30

Not published by the manufacturer: 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: Carbon
Bicycle weight: 11.88 kg

26.2 lb
Weight limit: 136 kg

299.8 lb

Suspension

Suspension configuration: Full suspension
Front travel: 120 mm
Rear travel: 115 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 52
Lowest gear: 17.9 in
Highest gear: 92.8 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Dropper seatpost
Shifting: Electronic

Additional specifications

Bottom bracket standard: BB86/BB92
Fork spring: Air
Tire width: 2.4″
Wheel material: Carbon
Wheel size: 29″

Technical analysis

4 measures

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

Front travel

120 mm

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,324 bicycles with this information
Coverage: 98.1% of the class

Lowest gear

17.9 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,137 bicycles with this information
Coverage: 84.2% of the class

Highest gear

92.8 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,137 bicycles with this information
Coverage: 84.2% of the class

Shifting

Electronic

53 of 1,346 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,346 bicycles with this information
Coverage: 99.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.8 km/h
Highest gear: 35.5 km/h

Total gear range 520%

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: 17.9–92.8 gear inches
Class reference (p10–p90): 16.9–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2021
Lowest gear: 1137 bicycles with this information, 84.2% of the class
Highest gear: 1137 bicycles with this information, 84.2% 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 2021 builds

Differences across 2021 builds
Specification	This bicycle Trek Top Fuel 9.8 GX AXS	Trek Top Fuel 7 SX	Trek Top Fuel 8 NX	Trek Top Fuel 9.7	Trek Top Fuel 9.8 GX	Trek Top Fuel 9.8 XT
Frame
Frame material	Carbon	Aluminum	Aluminum	Carbon	Carbon	Carbon
Bicycle weight	11.88 kg	14.17 kg	13.66 kg	12.65 kg	11.74 kg	11.83 kg
Drivetrain
Smallest sprocket	10	11	11	11	10	10
Largest sprocket	52	50	50	50	52	51
Lowest gear	17.9 in	18.6 in	18.6 in	18.6 in	17.9 in	18.2 in
Highest gear	92.8 in	84.4 in	84.4 in	84.4 in	92.8 in	92.8 in
Cockpit
Shifting	Electronic	Mechanical	Mechanical	Mechanical	Mechanical	Mechanical
Other specifications
Wheel material	Carbon	Aluminum	Aluminum	Aluminum	Carbon	Carbon
Tire clearance	Not informed	Maximum tire width: 2.4″	Maximum tire width: 2.4″	Maximum tire width: 2.4″	Maximum tire width: 2.4″	Maximum tire width: 2.4″