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, a fitness tracker, a kickstand, 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.
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, fender, and kickstand mounts make it easy to accessorize, so your mountain bike can double as a rugged commuter
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.
Shock-absorbing fork allows the front wheel to travel up and down over bumps while the handlebars stay steady, for a comfortable, controlled ride.
*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|
|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|
|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|
Bontrager alloy, 29.2mm, 12mm offset, 300mm length
Bontrager alloy, 29.2mm, 12mm offset, 330mm length
Bontrager alloy, 29.2mm, 12mm offset, 400mm length
Bontrager alloy, 31.8mm, 15mm rise, 660mm width
M/L, L, XL
Bontrager alloy, 31.8mm, 15mm rise, 690mm width
Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 60mm length
Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 80mm length
Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 90mm length
Bontrager alloy, 31.8mm clamp, Blendr compatible, 7 degree, 100mm length
|Brake||Tektro alloy linear-pull|
- 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.
137.0 - 155.0 cm
4'5.9" - 5'1.0"
64.0 - 73.0 cm
25.2" - 28.7"
153.0 - 162.0 cm
5'0.2" - 5'3.8"
72.0 - 76.0 cm
28.3" - 29.9"
170.0 - 179.0 cm
5'6.9" - 5'10.5"
80.0 - 84.0 cm
31.5" - 33.1"
177.0 - 188.0 cm
5'9.7" - 6'2.0"
83.0 - 88.0 cm
32.7" - 34.6"
186.0 - 196.0 cm
6'1.2" - 6'5.2"
87.0 - 92.0 cm
34.3" - 36.2"
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|