Trek Dual Sport 4

2021 UrbanCommuter Manufacturer page

Fork travel: 63 mm
Wheels: 700c
Drivetrain: 1 × 11 42t / 11–51t
Gear range: 464%
Weight: 12.48 kg 27.5 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 155–166
MD 164–176
LG 174–187
XL 185–197

Components

19 of 22 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 Gold Aluminum, DuoTrap S compatible, internal cable routing, rack & fender mounts, post mount disc, kickstand mount, 135x5mm QR Not identified

Suspension

1 part

Fork
- SR Suntour

Drivetrain

6 parts

Bottom bracket
- Prowheel
PW-BB73
Cassette
- Shimano Deore CS-M5100-11 11 speeds
CS-M5100-11
Chain
- KMC X11 11 speeds
Crankset
- Prowheel 42t
Rear derailleur
- Shimano Deore RD-M5100 11 speeds
RD-M5100
Shifters
- Shimano Deore SL-M5100
SL-M5100

Brakes

2 parts

Brakes
- Shimano BR-MT200
BR-MT200
Disc rotors
- Shimano SM-RT54
SM-RT54

Wheels and tires

5 parts

Front hub
- Shimano HB-M3050
HB-M3050
Rear hub
- Shimano FH-M3050
FH-M3050
Rims
- Bontrager
Spokes

14g stainless steel Not identified
Tires
- Bontrager

Cockpit and contact points

7 parts

Grips
- Bontrager
Handlebar
- Bontrager
Headset

1-1/8'' threadless, sealed cartridge bearings Not identified
Pedals
- Wellgo
Saddle
- Bontrager
Seatpost
- Bontrager
Stem
- Bontrager

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 416mm

Stack 606mm

Wheelbase 1100mm

Head angle 71.0°

Seat angle 74.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 700c wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	410	416	423	434
Stackmm	595	606	616	639
Top tube lengthmm	575	590	605	635
Seat tube lengthmm	381	445	508	571
Head tube lengthmm	115	125	135	155
Head tube angle	70°	71°	71°	72°
Seat tube angle	74.5°	74°	73.5°	72.5°
Chainstay lengthmm	460	460	460	460
Wheelbasemm	1096	1100	1105	1110
Front centermm	643	647	652	657
Bottom bracket dropmm	60	60	60	60
Bottom bracket heightmm	294	294	294	294
Standover heightmm	667	765	808	850
Fork rakemm	33	38	33	30
Trailmm	85	82	82	75
Stack/reach ratio	1.45	1.46	1.46	1.47

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: 12.48 kg

27.5 lb
Weight limit: 136 kg

299.8 lb

Suspension

Suspension configuration: Hardtail
Front travel: 63 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 42
Largest chainring: 42
Rear sprockets: 11
Smallest sprocket: 11
Largest sprocket: 51
Lowest gear: 23.9 in
Highest gear: 110.7 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: BSA
Fork spring: Coil
Tire clearance: Maximum tire width: 45c; Additional specification: Wheel kind: 700
Tire width: 40c
Wheel material: Aluminum
Wheel size: 700c

Gearing

Estimated speeds at 80 rpm

Lowest gear: 9.1 km/h
Highest gear: 42.4 km/h

Total gear range 464%

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: 23.9–110.7 gear inches

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
Specification	This bicycle Trek Dual Sport 4	Trek Dual Sport 1	Trek Dual Sport 1 Women's	Trek Dual Sport 2	Trek Dual Sport 2 Equipped	Trek Dual Sport 2 Equipped Stagger
Frame
Intended fit	Unisex	Unisex	womens	Unisex	Unisex	Unisex
Bicycle weight	12.48 kg	13.73 kg	13.69 kg	13.18 kg	15.37 kg	15.27 kg
Drivetrain
Front chainrings	1	3	3	3	3	3
Smallest chainring	42	28	28	28	28	28
Largest chainring	42	48	48	48	48	48
Rear sprockets	11	7	7	8	8	8
Smallest sprocket	11	14	14	11	11	11
Largest sprocket	51	34	34	32	32	32
Lowest gear	23.9 in	23.9 in	23.9 in	25.4 in	25.4 in	25.4 in
Highest gear	110.7 in	99.4 in	99.4 in	126.6 in	126.6 in	126.6 in
Brakes
Brake type	Hydraulic disc	Mechanical disc	Mechanical disc	Hydraulic disc	Mechanical disc	Hydraulic disc
Other specifications
Bottom bracket standard	BSA	Not informed	Not informed	Not informed	Not informed	Not informed

Changes since 2020
Specification	2020 Trek Dual Sport 4	This bicycle Trek Dual Sport 4
Drivetrain
Front chainrings	2	1
Smallest chainring	28	42
Rear sprockets	10	11
Largest sprocket	40	51
Lowest gear	20.3 in	23.9 in
Other specifications
Bottom bracket standard	Not informed	BSA
Tire clearance	Not informed	Maximum tire width: 45c; Additional specification: Wheel kind: 700