Trek Top Fuel RSL Gen 4

Name: Trek Top Fuel RSL Gen 4
Brand: Trek

2026 MountainTrail Manufacturer page

Trek Top Fuel RSL Gen 4, color Navy Smoke

Last known price: $10,499

Prices shown first for United States
Travel: 120 / 120 mm Fork / rear shock
Wheels: 29″
Drivetrain: 1 × 12 34t / 10–52t
Gear range: 520%
Weight: 11.98 kg 26.4 lb · Reference configuration not specified
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

MD 165–177
MD 165–177
MD/LG 173–180
MD/LG 173–180
LG 177–189
LG 177–189
XL 187–195
XL 187–195

Components

16 of 18 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

OCLV Mountain Carbon, internal storage, tapered head tube, internal guided routing, downtube guard, alloy rocker link, 4-way Mino Link, ABP, Boost148, 120mm travel Not identified

Suspension

2 parts

Drivetrain

7 parts

Brakes

2 parts

Wheels and tires

2 parts

Cockpit and contact points

4 parts

Grips
- Trek
Handlebar
- Bontrager
Saddle

Verse Short Pro, carbon rails, 145mm width Not identified
Seatpost
- Bontrager

Sizes and geometry

8 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD/LG

Table

Reach 467mm

Stack 604mm

Wheelbase 1207mm

Head angle 65.9°

Seat angle 76.6°

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 Reported by the manufacturer

Complete manufacturer geometry table 8 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	457	452	472	467	486	482	516	512
Stackmm	596	599	600	604	604	608	623	626
Top tube lengthmm	586	587	609	611	629	630	671	672
Seat tube lengthmm	410	410	420	420	435	435	470	470
Head tube lengthmm	105	105	110	110	115	115	135	135
Head tube angle	66.4°	65.9°	66.4°	65.9°	66.4°	65.9°	66.4°	65.9°
Seat tube angle	77.8°	77.3°	77.1°	76.6°	76.8°	76.3°	76.1°	75.6°
Chainstay lengthmm	434	435	439	440	439	440	444	445
Wheelbasemm	1184	1185	1207	1207	1224	1224	1267	1268
Front centermm	752	752	769	769	786	786	825	825
Bottom bracket dropmm	29	35	29	35	29	35	29	35
Bottom bracket heightmm	345	339	345	339	345	339	345	339
Standover heightmm	745	739	748	742	749	743	753	747
Fork rakemm	42	43	44	43	45	43	44	44
Trailmm	115	120	115	120	115	120	115	120
Stack/reach ratio	1.30	1.33	1.27	1.29	1.24	1.26	1.21	1.22

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: 11.98 kg

26.4 lb
Weight limit: 136 kg

299.8 lb

Suspension

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

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 34
Largest chainring: 34
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 52
Lowest gear: 19.0 in
Highest gear: 98.6 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Derailleur hanger: UDH
Seatpost: Dropper seatpost
Shifting: Electronic

Additional specifications

Bottom bracket standard: BSA
Fork spring: Air
Power meter: SRAM X0 Eagle, power meter, DUB, 34T, T-Type, 55mm chainline, 170mm length
Tire clearance: Maximum tire width: 2.5″
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: 2026
Sample: 1,640 bicycles with this information
Coverage: 96.3% of the class

Lowest gear

19.0 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2026
Sample: 1,227 bicycles with this information
Coverage: 72.0% of the class

Highest gear

98.6 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2026
Sample: 1,227 bicycles with this information
Coverage: 72.0% of the class

Shifting

Electronic

388 of 1,702 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2026
Sample: 1,702 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.3 km/h
Highest gear: 37.8 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: 19.0–98.6 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: 2026
Lowest gear: 1227 bicycles with this information, 72.0% of the class
Highest gear: 1227 bicycles with this information, 72.0% 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 2026 builds

Differences across 2026 builds
Specification	This bicycle Trek Top Fuel RSL Gen 4	Trek Top Fuel 8	Trek Top Fuel 8 Gen 4	Trek Top Fuel 9.8 Gen 4 XT Di2	Trek Top Fuel 9.9 Gen 4 XTR Di2
Frame
Frame material	Carbon	Aluminum	Aluminum	Carbon	Carbon
Bicycle weight	11.98 kg	14.58 kg	14.58 kg	14 kg	13.1 kg
Suspension
Front travel	120 mm	130 mm	130 mm	130 mm	130 mm
Drivetrain
Smallest chainring	34	30	30	30	30
Largest chainring	34	30	30	30	30
Largest sprocket	52	51	51	51	51
Lowest gear	19.0 in	17.1 in	17.1 in	17.1 in	17.1 in
Highest gear	98.6 in	87.0 in	87.0 in	87.0 in	87.0 in
Cockpit
Derailleur hanger	UDH	Not informed	Not informed	Not informed	Not informed
Shifting	Electronic	Mechanical	Mechanical	Electronic	Electronic
Other specifications
Power meter	SRAM X0 Eagle, power meter, DUB, 34T, T-Type, 55mm chainline, 170mm length	Not informed	Not informed	Not informed	Not informed
Wheel material	Carbon	Aluminum	Aluminum	Aluminum	Carbon
Wheel size	29″	29″	27.5″ / 29″	27.5″ / 29″	27.5″ / 29″