Marlin takes its cue from light, fast XC bikes. The right wheel size for each frame size, performance pedigree, and unbeatable ride feel make Marlin the perfect trail rider.
When you're ready for longer days on the bike, bigger challenges on the trail, and all the fun of the full mountain biking experience, you're ready for Marlin.
- Ride the fastest wheel that fits with Smart Wheel Size
- Ride-tuned aluminum frame is XC light, mountain tough
- Extended size range gives you a better fit for a better ride
Features & Info
Smart Wheel Size
Trek’s Smart Wheel Size
The right wheel size paired with your frame size gives you the perfect combination of responsiveness and control.
86% of respondents would recommend this to a friend.
Squeaky brakes (3)
Easy to scratch
Forks only on or off
Cross country (2)
Aug 01, 2017
Bad bike for actual mountain biking!!!
Good Looks, Nice Grips
Fork, Seat, Brakes, Shifters, Tires
Leisurly family rides
I bought this bike around 6 months ago and am starting to slowly get more and more aggravated with it. I ride 3-4 times a week on advanced trails and this bike was clearly not meant for it.The suspension fork is pretty much rock hard even when on.(I'm 149lbs) The brakes are absolutely terrible and the gears shift pretty bad. Starting to realized Trek uses cheap products on most of their bikes. Going to be trading this in very soon to get a different bike. Would not buy trek again.
by Boston Biker
from Boston, MA
May 19, 2017
Monster of a Bike
I'm 6'7" and the 23" Marlin 5 makes me feel small for once. It's a great fit and the ride is smooth and easy. The only issue I've had are the squeaky brakes, but I've gotten used to them.
by James the Giant
from Springfield, MO
May 18, 2017
Great Budget Bike
It is a great bike for the price. It looks cooler than bikes that cost almost double the price. Not recommended for extreme or downhill riding but it is more than good for cross country or trail riding
from Auburn Hills, Michigan
Feb 21, 2017
Easy To Keep Clean, Comfortable, Locking Suspension Fork, Durable, Lightweight, Fast, True To Size
Forks Only On Or Off, Squeaky Brakes, Easy To Scratch
Intermediate Trails, Advanced Trails, Cross Country
I've only had the bike for about two months now, and for my local trails it has worked fine. I haven't had any real problems with this bike either, except for the fact that the suspension fork only has the options open or closed. I would prefer a way to have it only half way open. Other than that I cannot complain about the bike for the price.
Jul 27, 2016
Squeaky Brakes, Seat Uncomfortable
Riding Around Town, Trail Riding
Just purchased the Marlin 5. And I must say it is an awesome mt bike. Glad I shopped locally too, as I almost bought a my. Bike online.ive owned other Trek Mt. Bikes and this is the best one by far, my last one was a Trek 820. So I'm glad I got this Marlin 5, handles excellent and love the 29 inch wheels. Viper red looks really good for this bike too.
by Eric ride on
from Southeast Iowa
Jul 14, 2016
Forks, Lightweight, Durable, Stylish, Tyres, Warm
Not Super Comfortable
Single Trails, Trails, And More, Jumps
super good bike for the price cant get any better for a front fork
Jul 14, 2016
best hard tail
Stylish, Durable, Suspension Is Sooooo Good, Lightweight, Warm
Not Super Comfy Seats
And More, Cross Country, Going On Trails, Single Track, Light Jumps
good for basically anything but not big jumps or SUPER hardcore trails
Jul 05, 2016
Stylish, Comfortable, Warm, Durable, Breathability, Lightweight, Packs Well
It is awesome
May 24, 2016
really good bike for offroading
Offroader Stunt Bike, Lightweight, Durable, Comfortable, Stylish
suspensions great but the spokes are weak i use this product to do offroading and races also going places
by stunt bikes
from boston ma
May 15, 2016
great mountain bike
Great Frame, Durable, Comfortable, Lightweight, Stylish, Packs Well
this bike is really good. the tires grip the terrain like if its nothing. The shifters are perfect for the bike never had a problem with them. The bike is great for trails.
May 12, 2016
So far so good
Lightweight, Stylish, Comfortable, Good Value, Weight
Mountain Biking, Commuting
I purchased this bike about two months ago from the local trek store. I have used it to commute around town and ride some of the trails New Mexico has to offer. I've done some easy trails as well as some moderate downhill and single track. The components are entry level but have done very well in both situations. The one thing I changed right away was the front fork. I'm 6'0 and 230 lbs. The suntour fork felt bouncy on the trails and would bottom out easily under my weight. All in all for a "sports" mountain bike I'm very satisfied with my purchase. I would definately recommend to a friend.
by Whoa Joey
from Albuquerque NM
Apr 03, 2016
Worst Bike I Have Owned
Wheels, Brakes, Forks
This is the worst bike I have ever owned. The AT-550 wheels are terrible. I've had to have the LBS true them and now I have a broken spoke. These are single walled rims on a mountain bike. Why??? Also, the forks stink as well. I guess I'm going to need to do something about these rims to even think about riding it. Not happy. :-(
from Dallas, TX
Mar 09, 2016
The best bike I've had
Lightweight, Comfortable, Stylish
I'm using this bike over 1,5 years. I'm really glad I have it!
I love this bike for riding around campus and exploring some trails in Marquette or SE Michigan. Cool color and looks so nice! The color is great but is easy to scratch. Great bike for the price though!
from Marquette, MI
Sep 09, 2015
Built Cheap, Flimsy
I sold it after 1 trip out with it. Never again will I buy a Trek mountain bike.
by Justin F.
Jun 12, 2015
Good Entry Level Bike but....
Mountaineering, Short Commutes
I have had this bike a year now. I am a larger guy 6'2" and 250lbs. I bought this bike and started biking 5 miles to and from work and riding it off road on the weekends. The brakes have not been able to stop me twice when going down some steeper inclines in town. I replaced the brake pads but with no fix. I ended up upgrading to hydraulic brakes which also required a shifter change but over all I do like the bike.
I would recommend this bike with the stipulation that if you are a bigger guy please consider upgrading the brakes first with something with bigger brake pads. It is not any fun flying out in traffic. Trek customer service has been awesome.
from Albuquerque, NM
Jun 04, 2015
A lot of fun, super fast!
Fast, Stylish, Nimble
Exercise, Commute, Trails, Mountain
I use this bike daily for a 15 mile pick me up in the mornings. For the price I received much more than I expected. It rides and shifts super smooth, small to medium bumps may as well not exist. My one real issue is it seems the front fork is a little soft. Other than that I couldn't be happier!
from Beaumont, tx
Apr 15, 2015
Trek Marlin 5
Stylish, Lightweight, Durable, Comfortable
My main use for this bike is recreation and exercise. Very stylish, great suspension, smooth ride The only slightly bad thing about the bike is the uncomfortable seat, but you will get used to it after a few rides and padded shorts/pants help a lot. Overall great bike, would recommend to anyone wanting to get into cycling
from Kalamazoo, MI
Apr 13, 2015
Trek Marlin 5
Durable, Comfortable, Stylish, Lightweight
I do not even know where to start! For the price you get a great bike that isn't as heavy as other bikes in this price range. I had a Specialized Myka before and absolutely hated it! I am so in love with this Trek. It handles very well on the trails and is a fast bike.
from Kalamazoo, MI
Apr 01, 2015
TREK Marlin 5 29er = Ready to Roll
Fast, Durable, Lightweight, Stylish
Urban, Trail, Street
Ride at will! I rode this beauty back from the shop and enjoyed every minute of it. Maiden voyage was 15 miles, and this rig rolls! Light, FAST, and Durable. Very well made. This Trek ate everything I could throw at it including curbs and drop offs. This is a great entry 29er you can modify as your skills progress. Part of the fun is adding components and optimizing it for you. That said, this bike is good to go as is. I agree that it could use double walled rims, but bang for buck, this is it. Very smooth ride, good feedback, and G2 geometry handles like a dream. Double thumbs up! One for the bike and one for the guys at Cyclists Choice Gulfport, MS.
When we ride we ride hard. the first trip on this bike was 26.8 miles one way. That day a 53.6 miles round trip handled well. Sturdy Light weight. Runs great, whole lot bike for the price. Since then put clip in peddles on makes it even better still getting the hang of those. The First little trip I Knocked 18 seconds off my usual time. 3.3miles
by Lets Go 1779
from Fort Worth Tx
Dec 01, 2014
So far, LOVE
Lightweight, Stylish, Durable
Got this bike on Black Friday and immediately put about 20 miles on it with a friend. Didn't go off pavement but took every opportunity to launch and juke all the urban obstacles I could find. I'm pretty aggressive and I will post again when I hit a "real" trail (offroad). I am wondering how durable it will stand against really coming down on the front end. The frame is sick and I don't have any issues with it or the 29ers (they are awesome compared to my old 26" GT). I just wonder about that front fork's abilities overall when offroading. Grips are fine but if they start sliding or rotating I'll repost a new review stating the situation. Gear drive works flawlessley but again no aggro-offroad riding yet. Brakes are bomb, of course... Otherwise yeah, looks great, rides great, tires, brakes, frame, grips, gears... all good thus far. I'll post soon. Take good care,
from El Paso
Alpha Silver Aluminum w/semi-integrated head tube, rack & fender mounts, G2 Geometry on 29ers
SR Suntour XCT, coil spring, preload, hydraulic lockout, G2 Geometry w/51mm offset on 29ers, 100mm travel (13.5: 80mm travel)