Trek 820

Name: Trek 820
Brand: Trek

2018 MountainCross-country

Last known price: $379

Prices shown first for United States
Fork travel: 75 mm
Wheels: 26″
Drivetrain: 3 × 7 24–42t / 14–28t
Gear range: 350%
Weight: 15.42 kg 34.0 lb · Reference configuration not specified
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

18 of 21 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 Not identified

Suspension

1 part

Fork
- SR Suntour
M-3030

Drivetrain

7 parts

Bottom bracket

Sealed cartridge Not identified
Cassette
- Shimano MF-TZ21
MF-TZ21
Chain
- KMC
Crankset
- Shimano FC-TY301 8 speeds 42/34/24t
FC-TY301
Front derailleur
- Shimano Tourney FD-TY500
FD-TY500
Rear derailleur
- Shimano Tourney RD-TY300 7 speeds
RD-TY300
Shifters
- Shimano ST-EF41
ST-EF41

Brakes

1 part

Brakes
- Tektro

Wheels and tires

4 parts

Cockpit and contact points

7 parts

Grips
- Bontrager
Handlebar
- Bontrager
Headset

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

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"

Table

Geometry diagram unavailable

The drawing needs reach and stack, which the manufacturer did not publish. Available facts remain in the table.

Size

Complete manufacturer geometry table 5 published sizes

Complete manufacturer geometry by size
Measurement
Top tube lengthmm	524	550	565	580	590
Seat tube lengthmm	330	406	457	495	533
Head tube lengthmm	110	110	130	150	170
Head tube angle	70.5°	70.5°	70.5°	70.5°	70.5°
Seat tube angle	74°	73.5°	73.5°	73°	73°
Chainstay lengthmm	430	430	430	430	430
Wheelbasemm	1019	1040	1057	1068	1079
Front centermm	595	615	632	643	654
Bottom bracket dropmm	56	52	50	50	50
Bottom bracket heightmm	287	291	293	293	293
Standover heightmm	705	738	772	799	827
Trailmm	76	76	76	76	76

Not published by the manufacturer: Reach, Stack, Fork rake, Stack/reach ratio, 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: Steel
Bicycle weight: 15.42 kg

34.0 lb
Weight limit: 136 kg

299.8 lb

Suspension

Suspension configuration: Hardtail
Front travel: 75 mm

Drivetrain

Derived by Bikelake

Front chainrings: 3
Smallest chainring: 24
Largest chainring: 42
Rear sprockets: 7
Smallest sprocket: 14
Largest sprocket: 28
Lowest gear: 22.3 in
Highest gear: 78.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Fork spring: Coil
Tire width: 2″
Wheel material: Aluminum
Wheel size: 26″

Technical analysis

4 measures

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

Front travel

75 mm

This value is below 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

22.3 gear inches

This value is above 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

78.0 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

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: 8.5 km/h
Highest gear: 29.9 km/h

Total gear range 350%

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: 22.3–78.0 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