Trek 8.1 DS

2014 UrbanHybrid

Suspension: Rigid
Wheels: 700c
Drivetrain: 3 × 7 28–48t / 14–34t
Gear range: 416%
Frame: Aluminum
Brakes: Rim brake

Sizes

Size guide

15.5"
17.5"
19"
21"
22.5"

The manufacturer did not publish rider heights for these sizes.

Components

12 of 16 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 Not identified

Suspension

1 part

Fork

High-tensile steel w/lowrider mounts; CLIX dropouts Not identified

Drivetrain

5 parts

Cassette
- SunRace
Crankset

Forged alloy, 48/38/28 w/chainguard Not identified
Front derailleur
- Shimano Tourney
Rear derailleur
- Shimano Altus
Shifters
- Shimano Altus

Brakes

1 part

Brakes
- Shimano Altus

Wheels and tires

2 parts

Cockpit and contact points

6 parts

Handlebar
- Bontrager
Headset

1-1/8" threadless Not identified
Pedals
- Wellgo
Saddle
- Bontrager
Seatpost
- Bontrager
Stem
- Bontrager

Sizes and geometry

5 sizes

Rider-height ranges are not published for these sizes.

Size

Geometry not published

The manufacturer lists these sizes without frame measurements, so there is no drawing or geometry table.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Fork material: Steel

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 3
Smallest chainring: 28
Largest chainring: 48
Rear sprockets: 7
Smallest sprocket: 14
Largest sprocket: 34
Lowest gear: 23.9 in
Highest gear: 99.4 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 38c
Wheel material: Aluminum
Wheel size: 700c

Technical analysis

2 measures

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

Lowest gear

23.9 gear inches

This value is within the central range for this class.

Cohort: Urban / Hybrid Model year: 2014
Sample: 120 bicycles with this information
Coverage: 93.0% of the class

Highest gear

99.4 gear inches

This value is below the central range for this class.

Cohort: Urban / Hybrid Model year: 2014
Sample: 120 bicycles with this information
Coverage: 93.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 9.1 km/h
Highest gear: 38.1 km/h

Total gear range 416%

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: 23.9–99.4 gear inches
Class reference (p10–p90): 22.2–126.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Urban / Hybrid Model year: 2014
Lowest gear: 120 bicycles with this information, 93.0% of the class
Highest gear: 120 bicycles with this information, 93.0% of the class