More options
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 that 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 drive train, semi-slick tyres that roll well on the road and trails, durable alloy wheels and a suspension fork that takes the edge off bumps. Plus, it has mounts so you can accessorise it with racks, mudguards, lights, a kickstand and more.
The final word
820 is a great bike for anyone testing the waters of off-road riding. It's versatile and 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 tyres and suspension fork take the edge off rough roads and trails
- Rack, mudguard and kickstand mounts make it easy to accessorise, so your mountain bike can double as a rugged commuter
- Backed by Trek's limited lifetime warranty
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 smooths 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, 135x5 mm QR |
|---|---|
| Fork | SR Suntour M-3030, coil spring, 100x5 mm QR, 75 mm travel |
| Max compatible fork travel | 75mm |
| Front hub | Formula FM21 alloy, 100x5 mm QR |
|---|---|
| Rear hub | Formula FM31 alloy, 7-sp freewheel, 135x5 mm QR |
| Rim | Bontrager AT-550, alloy, 36-hole, schrader valve |
| Max tyre size | 26x2.00" |
| Shifter | Shimano Tourney EF41, 7-speed |
|---|---|
| Front derailleur | Shimano Tourney TY500, 31.8 mm clamp, top swing, dual pull |
| Rear derailleur | Shimano Tourney TY300, long cage, 34T max cog |
| Crank | Shimano Tourney TY301, 42/34/24, 170 mm 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, 29.2 mm, 12 mm offset, 300 mm length |
|
Size:
M/L, L Bontrager alloy, 29.2 mm, 12 mm offset, 330 mm length |
|
|
Size:
XL, XXL Bontrager alloy, 29.2 mm, 12 mm offset, 400 mm length |
|
| *Handlebar |
Size:
XS, S Bontrager alloy, 31.8 mm, 15 mm rise, 660 mm width |
|
Size:
M/L, L, XL, XXL Bontrager alloy, 31.8 mm, 15 mm rise, 690 mm width |
|
| Grips | Bontrager SSR |
| *Stem |
Size:
XS Bontrager alloy, 31.8 mm, Blendr-compatible, 7-degree, 60 mm length |
|
Size:
S Bontrager alloy, 31.8 mm, Blendr-compatible, 7-degree, 80 mm length |
|
|
Size:
M/L, L Bontrager alloy, 31.8 mm clamp, Blendr-compatible, 7-degree, 90 mm length |
|
|
Size:
XL, XXL Bontrager alloy, 31.8 mm clamp, Blendr-compatible, 7-degree, 100 mm length |
|
| Head set | 1-1/8" threadless |
| Brake | Tektro alloy linear-pull |
| Weight | ML – 15.28 kg / 33.68 lb (with tubes) |
|---|---|
| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb). |
Sizing & fit
Proper bike fit is essential for best performance and comfort. Any size and geometry measurements shown on trekbikes.com are for general comparison purposes only. To find your perfect fit, visit an authorised Trek retailer, where an expert skilled at sizing will help you find the appropriate bike and size for your individual needs.
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 stated.
| 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 |