Trek Top Fuel 8 Gen 3 XT

Name: Trek Top Fuel 8 Gen 3 XT
Brand: Trek

2024 MountainTrail Manufacturer page

Last known price: $3,999

Prices shown first for United States
Travel: 130 / 120 mm Fork / rear shock
Wheels: 29″
Drivetrain: 1 × 12 30t / 10–51t
Gear range: 510%
Weight: 14.02 kg 30.9 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

15.5"
15.5"
17.5"
17.5"
18.5"
18.5"
19.5"
19.5"
21.5"
21.5"
23"
23"

The manufacturer did not publish rider heights for these sizes.

Components

17 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.

Frame and fork

1 part

Frame

Alpha Platinum Aluminum, internal storage, tapered head tube, Knock Block 2.0, internal guided routing, downtube guard, magnesium rocker link, Mino Link, ABP, Boost148, 120mm travel Not identified

Suspension

2 parts

Drivetrain

6 parts

Bottom bracket
- Shimano
BB-MT501SM-BB52
Cassette
- Shimano SLX CS-M7100-12 12 speeds 10–51t
CS-M7100-12
Chain
- Shimano SLX CN-M7100
CN-M7100
Crankset
- Shimano Deore FC-M6120 12 speeds 30t
FC-M6120
Rear derailleur
- Shimano Deore XT RD-M8100-SGS 12 speeds
RD-M8100-SGS
Shifters
- Shimano Deore XT SL-M8100
SL-M8100

Brakes

2 parts

Wheels and tires

2 parts

Cockpit and contact points

6 parts

Grips
- Bontrager
Handlebar
- Bontrager
Headset

Knock Block 2.0 Integrated, 72-degree radius (includes infinite-radius chip), sealed cartridge bearing, 1-1/8'' top, 1.5'' bottom Not identified
Saddle
- Bontrager
Seatpost
- Tranz-X
JD-YSP39
Stem
- Bontrager

Sizes and geometry

12 sizes Open in the geometry plotter

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

Size 18.5"

Table

Reach 460mm

Stack 604mm

Wheelbase 1201mm

Head angle 65.5°

Seat angle 75.5°

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 12 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	419	415	449	445	464	460	479	475	499	495	519	515
Stackmm	596	599	596	599	600	604	605	608	619	622	630	631
Top tube lengthmm	569	570	599	600	615	616	631	632	654	655	677	678
Seat tube lengthmm	395	395	420	420	435	435	450	450	500	500	540	540
Head tube lengthmm	100	100	100	100	105	105	110	110	125	125	135	135
Head tube angle	65.9°	65.5°	65.9°	65.5°	65.9°	65.5°	65.9°	65.6°	65.9°	65.6°	65.9°	65.6°
Seat tube angle	75.9°	75.5°	75.9°	75.5°	75.9°	75.5°	75.9°	75.6°	75.9°	75.6°	69.9°	69.6°
Chainstay lengthmm	434	435	434	435	434	435	434	435	434	435	434	435
Wheelbasemm	1153	1154	1183	1184	1200	1201	1217	1218	1244	1244	1268	1268
Front centermm	720	721	750	751	767	768	784	785	811	811	835	835
Bottom bracket dropmm	27	32	27	33	27	33	27	33	27	33	27	33
Bottom bracket heightmm	347	342	347	341	347	341	347	341	347	341	347	341
Standover heightmm	724	719	744	739	749	744	754	749	764	759	764	759
Fork rakemm	42	43	42	43	42	43	42	44	43	44	42	44
Trailmm	120	123	120	123	120	123	120	123	120	123	112	122
Stack/reach ratio	1.42	1.44	1.33	1.35	1.29	1.31	1.26	1.28	1.24	1.26	1.21	1.23

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: Aluminum
Bicycle weight: 14.02 kg

30.9 lb
Weight limit: 136 kg

299.8 lb

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: 12
Smallest sprocket: 10
Largest sprocket: 51
Lowest gear: 17.1 in
Highest gear: 87.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Dropper seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Fork spring: Air
Tire clearance: Maximum tire width: 2.5″
Tire width: 2.4″
Wheel material: Aluminum
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

130 mm

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2024
Sample: 2,032 bicycles with this information
Coverage: 96.6% of the class

Lowest gear

17.1 gear inches

This value is below the central range for this class.

Cohort: Mountain / Trail Model year: 2024
Sample: 1,555 bicycles with this information
Coverage: 73.9% of the class

Highest gear

87.0 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2024
Sample: 1,555 bicycles with this information
Coverage: 73.9% of the class

Shifting

Mechanical

344 of 2,103 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2024
Sample: 2,103 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.5 km/h
Highest gear: 33.3 km/h

Total gear range 510%

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: 17.1–87.0 gear inches
Class reference (p10–p90): 17.1–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2024
Lowest gear: 1555 bicycles with this information, 73.9% of the class
Highest gear: 1555 bicycles with this information, 73.9% 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 2024 builds

Differences across 2024 builds
Specification	This bicycle Trek Top Fuel 8 Gen 3 XT	Trek Top Fuel 5 Gen 3	Trek Top Fuel 8 Gen 3	Trek Top Fuel 8 Gen 3 GX AXS T-Type	Trek Top Fuel 9.8 Gen 3 GX AXS T-Type	Trek Top Fuel 9.8 Gen 3 XT
Frame
Frame material	Aluminum	Aluminum	Aluminum	Aluminum	Carbon	Carbon
Bicycle weight	14.02 kg	15.6 kg	14.02 kg	14.02 kg	12.98 kg	13.18 kg
Drivetrain
Largest sprocket	51	51	51	52	52	51
Lowest gear	17.1 in	17.1 in	17.1 in	16.7 in	16.7 in	17.1 in
Cockpit
Shifting	Mechanical	Mechanical	Mechanical	Electronic	Electronic	Mechanical
Derailleur hanger	Not informed	Not informed	Not informed	UDH	UDH	Not informed
Other specifications
Tire clearance	Maximum tire width: 2.5″	Maximum tire width: 2.5″	Maximum tire width: 2.5″	Maximum tire width: 2.5″	Maximum tire width: 2.5″	Not informed
Tire width	2.4″	2.4″	2.4″	2.5″	2.4″	2.4″
Wheel material	Aluminum	Aluminum	Aluminum	Aluminum	Carbon	Carbon
Wheel size	29″	29″	29″	29″	27.5″ / 29″	29″