Trek 820

2010 MountainCross-country

Wheels: 26″
Drivetrain: 3 × 7 28–48t / 13–34t
Gear range: 448%
Frame: Steel
Brakes: Rim brake

Sizes

Size guide

13"
16"
18"
19.5"
21"

The manufacturer did not publish rider heights for these sizes.

Components

13 of 15 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

Trek Custom Steel w/chromoly seat tube Not identified

Drivetrain

5 parts

Cassette
- Shimano MF-TZ31
MF-TZ31
Crankset

Hawk DX 48/38/28 Not identified
Front derailleur
- Shimano FD-C051
FD-C051
Rear derailleur
- Shimano RD-TX31
RD-TX31
Shifters
- Shimano ST-EF40
ST-EF40

Brakes

1 part

Brakes
- Tektro

Wheels and tires

2 parts

Cockpit and contact points

6 parts

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: Steel

Drivetrain

Derived by Bikelake

Front chainrings: 3
Smallest chainring: 28
Largest chainring: 48
Rear sprockets: 7
Smallest sprocket: 13
Largest sprocket: 34
Lowest gear: 21.4 in
Highest gear: 96.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 2″
Wheel material: Aluminum
Wheel size: 26″

Technical analysis

2 measures

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

Lowest gear

21.4 gear inches

This value is above the central range for this class.

Cohort: Mountain / Cross-country Model year: 2010
Sample: 186 bicycles with this information
Coverage: 75.6% of the class

Highest gear

96.0 gear inches

This value is below the central range for this class.

Cohort: Mountain / Cross-country Model year: 2010
Sample: 186 bicycles with this information
Coverage: 75.6% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 8.2 km/h
Highest gear: 36.8 km/h

Total gear range 448%

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: 21.4–96.0 gear inches
Class reference (p10–p90): 16.8–116.0 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Cross-country Model year: 2010
Lowest gear: 186 bicycles with this information, 75.6% of the class
Highest gear: 186 bicycles with this information, 75.6% of the class