Trek Top Fuel 8

Name: Trek Top Fuel 8
Brand: Trek

2018 MountainCross-country

Last known price: $2,799

Prices shown first for United States
Travel: 100 / 100 mm Fork / rear shock
Wheels: 27.5″, 29″
Drivetrain: 2 × 11 22–36t / 11–42t
Gear range: 625%
Weight: 12.93 kg 28.5 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

15.5" Low
17.5" Low
18.5" Low
19.5" Low
21.5" Low

The manufacturer did not publish rider heights for these sizes.

Components

17 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

Alpha Platinum Aluminum, ABP, Full Floater, EVO link, E2 tapered head tube, Mino Link, MicroTruss, internal derailleur and dropper post routing, down tube guard, PF92, Boost148 & G2 Geometry on 29ers, 100mm travel Not identified

Suspension

2 parts

Drivetrain

7 parts

Bottom bracket

PF92 Not identified
Cassette
- Shimano SLX CS-M7000-11
CS-M7000-11
Chain
- KMC X11 11 speeds
Crankset
- Race Face Ride 36/22t
Front derailleur
- Shimano SLX FD-M7020
FD-M7020
Rear derailleur
- Shimano SLX RD-M7000
RD-M7000
Shifters
- Shimano SLX SL-M7000
SL-M7000

Brakes

1 part

Brakes
- Shimano BR-MT500
BR-MT500

Wheels and tires

2 parts

Cockpit and contact points

7 parts

Sizes and geometry

5 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" Low

Table

Reach 443mm

Stack 577mm

Wheelbase 1127mm

Head angle 70.0°

Seat angle 74.0°

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 5 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	392	427	443	457	472
Stackmm	561	577	577	587	606
Top tube lengthmm	553	577	593	611	633
Seat tube lengthmm	394	419	445	470	495
Head tube lengthmm	100	90	90	100	120
Head tube angle	70°	70°	70°	70°	70°
Seat tube angle	73.5°	74°	74°	74°	74°
Chainstay lengthmm	427	435	435	435	435
Wheelbasemm	1064	1111	1127	1144	1166
Front centermm	638	679	695	712	734
Bottom bracket dropmm	25	39	39	39	39
Bottom bracket heightmm	330	330	330	330	330
Standover heightmm	747	730	724	730	738
Fork rakemm	48	52	52	51	51
Trailmm	80	80	80	80	80
Stack/reach ratio	1.43	1.35	1.30	1.28	1.28

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: 12.93 kg

28.5 lb
Weight limit: 136 kg

299.8 lb

Suspension

Suspension configuration: Full suspension
Front travel: 100 mm
Rear travel: 100 mm

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 22
Largest chainring: 36
Rear sprockets: 11
Smallest sprocket: 11
Largest sprocket: 42
Lowest gear: 15.2 in
Highest gear: 94.9 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BB86/BB92
Fork spring: Air
Tire width: 2.2″
Wheel material: Aluminum
Wheel size: 27.5″, 29″

Technical analysis

4 measures

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

Front travel

100 mm

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2018
Sample: 771 bicycles with this information
Coverage: 97.9% of the class

Lowest gear

15.2 gear inches

This value is below the central range for this class.

Cohort: Mountain / Cross-country Model year: 2018
Sample: 724 bicycles with this information
Coverage: 91.9% of the class

Highest gear

94.9 gear inches

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2018
Sample: 724 bicycles with this information
Coverage: 91.9% of the class

Shifting

Mechanical

18 of 787 bicycles with this information use electronic shifting.

Cohort: Mountain / Cross-country Model year: 2018
Sample: 787 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 5.8 km/h
Highest gear: 36.4 km/h

Total gear range 625%

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: 15.2–94.9 gear inches
Class reference (p10–p90): 16.5–105.0 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Cross-country Model year: 2018
Lowest gear: 724 bicycles with this information, 91.9% of the class
Highest gear: 724 bicycles with this information, 91.9% 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 2018 builds
Specification	This bicycle Trek Top Fuel 8	Trek Top Fuel 9.7	Trek Top Fuel 9.8 SL	Trek Top Fuel 9.8 SL Women's	Trek Top Fuel 9.9 Race Shop Limited
Frame
Intended fit	Unisex	Unisex	Unisex	womens	Unisex
Frame material	Aluminum	Carbon	Carbon	Carbon	Carbon
Bicycle weight	12.93 kg	11.52 kg	10.93 kg	10.7 kg	10.02 kg
Drivetrain
Front chainrings	2	1	1	1	1
Smallest chainring	22	32	32	32	34
Largest chainring	36	32	32	32	34
Rear sprockets	11	11	12	12	12
Smallest sprocket	11	10	10	10	10
Largest sprocket	42	42	50	50	50
Lowest gear	15.2 in	22.1 in	18.6 in	18.6 in	19.7 in
Highest gear	94.9 in	92.8 in	92.8 in	92.8 in	98.6 in
Other specifications
Wheel material	Aluminum	Aluminum	Aluminum	Aluminum	Carbon