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It's right for you if...
You're ready to try your hand at mountain biking to see if you fall in love, and want a bike you can ride wherever you choose. You plan to ride all types of terrain, from city streets to gravel paths and light singletrack.
The tech you get
820 has a strong steel frame, a reliable 21-speed Shimano drivetrain, semi-slick tires that roll well on pavement and trails, durable alloy wheels, and a suspension fork that takes the edge off bumps. Plus, it has mounts so you can accessorize with racks, fenders, lights, and more.
The final word
820 is a great bike for anyone testing the waters of off-road riding. It's versatile, durable, and works well on rough pavement, light trails, or both.
The Walkthrough
favorite_borderWhy you'll love it
- 820 is a great bike at an even better price, and it lets you explore off-road riding without the giant price tag that comes with higher-end mountain bikes
- The high-volume mountain bike tires and suspension fork take the edge off rough roads and trails
- Rack and fender mounts make it easy to accessorize, so your mountain bike can double as a rugged commuter
How to: Remove and install wheels
From transporting on a rack to fixing a flat, sometimes those wheels need to come off your bike. Keep watching to learn how to safely remove and install wheels that use a quick release system.
Watch the video
How to: Wash your bike
A clean bike is a happy bike, but washing your ride is a bit more complicated than a quick spray with the hose or a joyride through your local car wash. Follow our step-by-step process and you’ll learn the dos and don’ts of keeping your bike in tip-top shape!
Watch the video
How to: Pump your tires
Setting your bike's tire pressure correctly will give you a more comfortable ride with better grip and handling. Even better, it can help prevent flats
Watch the video
How to: Fix a flat tire
Flat? Fixed. Our simple how-to video will show you how to get back on two wheels in no time flat.
Watch the videoYou might also like
Features
Rack mounts
Going for a long ride? Rack mounts make carrying accessories a breeze.
Trek custom steel frame
Rugged steel strengthens the frame and smoothes the ride.
Suspension fork
Shock-absorbing fork allows the front wheel to travel up and down over bumps while the handlebars stay steady, for a comfortable, controlled ride.
Specifications
*spec applies to all sizes unless otherwise noted
| Frame | Trek Custom Steel, rack mounts, 135x5mm QR |
|---|---|
| Fork | SR Suntour M-3030, coil spring, 100x5mm QR, 75mm travel |
| Max compatible fork travel | 75mm |
| Front hub | Formula FM21 alloy, 100x5mm QR |
|---|---|
| Rear hub | Formula FM31 alloy, 7sp freewheel, 135x5mm QR |
| Rim | Bontrager AT-550, alloy, 36-hole, schrader valve |
| Max tire size | 26x2.00" |
| Shifter | Shimano Tourney EF41, 7 speed |
|---|---|
| Front derailleur | Shimano Tourney TY500, 31.8mm clamp, top swing, dual pull |
| Rear derailleur | Shimano Tourney TY300, long cage, 34T max cog |
| Crank | Shimano Tourney TY301, 42/34/24, 170mm length |
| Cassette | Shimano TZ500, 14-28, 7 speed |
| Chain | KMC Z7, 7 speed |
| Pedal | VP-536 nylon platform |
| Saddle | Bontrager Sport |
|---|---|
| *Seatpost |
Size:
XS, S Bontrager alloy, 29.2mm, 12mm offset, 300mm length |
|
Size:
M/L, L Bontrager alloy, 29.2mm, 12mm offset, 330mm length |
|
|
Size:
XL Bontrager alloy, 29.2mm, 12mm offset, 400mm length |
|
| *Handlebar |
Size:
XS, S Bontrager alloy, 31.8mm, 15mm rise, 660mm width |
|
Size:
M/L, L, XL Bontrager alloy, 31.8mm, 15mm rise, 690mm width |
|
| Grips | Bontrager SSR |
| *Stem |
Size:
XS Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 60mm length |
|
Size:
S Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 80mm length |
|
|
Size:
M/L, L Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 90mm length |
|
|
Size:
XL Bontrager alloy, 31.8mm clamp, Blendr compatible, 7 degree, 100mm length |
|
| Headset | 1-1/8'' threadless |
| Brake | Tektro alloy linear-pull |
| Weight | ML - 15.28 kg / 33.68 lbs (with tubes) |
|---|---|
| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg). |
Sizing & fit
The charts below show our recommended sizes based on height, but there are some other factors, like arm and leg length, that determine a great fit. That’s why you’ll see some overlap in our recommendations. Not every rider who’s 5´8˝, for example, will fit on the same size bike. The best way to find your perfect fit is to consult the experts at your local Trek retailer.
Rider Height
Inseam
XS
137.0 - 155.0 cm
4'5.9" - 5'1.0"
64.0 - 73.0 cm
25.2" - 28.7"
S
153.0 - 166.5 cm
5'0.2" - 5'5.6"
72.0 - 79.0 cm
28.3" - 31.1"
M/L
165.5 - 179.0 cm
5'5.2" - 5'10.5"
77.0 - 84.0 cm
30.3" - 33.1"
L
177.0 - 188.0 cm
5'9.7" - 6'2.0"
83.0 - 88.0 cm
32.7" - 34.6"
XL
186.0 - 196.0 cm
6'1.2" - 6'5.2"
87.0 - 92.0 cm
34.3" - 36.2"
2XL
195.0 - 203.0 cm
6'4.8" - 6'7.9"
92.0 - 95.0 cm
36.2" - 37.4"
All measurements provided in cm unless otherwise noted.
| Frame size number | Frame size letter | Wheel size | A — Seat tube | B — Seat tube angle | C — Head tube length | D — Head angle | E — Effective top tube | F — Bottom bracket height | G — Bottom bracket drop | H — Chainstay length | I — Offset | J — Trail | K — Wheelbase | L — Standover |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 13 in | XS | 26" | 33.0 | 74.0° | 11.0 | 70.5° | 52.4 | 28.7 | 0.0 | 43.0 | 4.0 | 7.6 | 101.9 | 70.5 |
| 16 in | S | 26" | 40.6 | 73.5° | 11.0 | 70.5° | 55.0 | 29.1 | 0.0 | 43.0 | 4.0 | 7.6 | 104.0 | 73.8 |
| 18 in | ML | 26" | 45.7 | 73.5° | 13.0 | 70.5° | 56.5 | 29.3 | 0.0 | 43.0 | 4.0 | 7.6 | 105.7 | 77.2 |
| 19.5 in | L | 26" | 49.5 | 73.0° | 15.0 | 70.5° | 58.0 | 29.3 | 0.0 | 43.0 | 4.0 | 7.6 | 106.8 | 79.9 |
| 21 in | XL | 26" | 53.3 | 73.0° | 17.0 | 70.5° | 59.0 | 29.3 | 0.0 | 43.0 | 4.0 | 7.6 | 107.9 | 82.7 |
| 22.5 | XXL | 26" | 57.2 | 72.5° | 19 | 70.5° | 60.0 | 29.5 | 0.0 | 43.0 | 4.0 | 7.6 | 108.4 | 85.7 |