Trek 3900 XC Hardtail

DESCRIPTION

  • Alloy front
  • Rear Derailleur
  • Matrix 550 rims
  • Alpha Aluminum
  • Front Suspension

USER REVIEWS

Showing 1-10 of 48  
[Aug 07, 2014]
Lalt
Cross Country Rider

OVERALL
RATING
5
VALUE
RATING
5
Strength:

Frame is absolutely solid

Weakness:

Most components especially the Suntour forks are garbage.

First bike after many many years away from riding. As soon as I bought it, I hooked up with many real MTBers. This bike of course was far below the standards necessary, but it took a tremendous beating along the way.

I quickly broke most of the cheapest components and upgraded and replaced them until almost nothing origninal except BB and seatpost clamp were left on the frame.

Rockshox Reba RLT and XT components all the way around and finally retired the frame as I upgraded to a BMC carbon Full suspension.

I am putting back together to use to ride with the kids around the neighborhood. Overall, it was a great entry level bike to get me back in the sport and outperformed what it was made to do, at least for me.

Similar Products Used:

BMC

[Aug 02, 2012]
Sergio Renteria

OVERALL
RATING
3
VALUE
RATING
5
Strength:

Awesome frame

Weakness:

Cheap compoments, all bikes should've came with disc brakes. The saddle, and peddals.

Great bike for the price. Haven't really done any hard riding, but overall it feels great. I got the one with V type brakes and made the disc conversion myself and it was fairly easy. I replaced the wheels with lighter disc type wheels, replaced the crankset, pedals, front and rear dérailleurs, shifters, brake levers, grips, and saddle. All I need now is a new fork.

[Mar 24, 2012]
Allrotor13b
All Mountain Rider

OVERALL
RATING
3
VALUE
RATING
4
Strength:

For under $500, you get yourself a lifetime-warranted frame! The newest version has a zero-stack headset, pretty decent components, and disc brakes. The factory components are ok, if you do not ride too much trail or gravity. The bike is upgradable.

Weakness:

Wheels and fork are absolutely rubbish, but that is true across the board at this price.

Nice bike to get you rolling, which you can upgrade as you go.
The geometry is friendly and is middle-of-the-road enough to accommodate any riding style.

Similar Products Used:

Diamondback, Gary Fisher, etc.

[Dec 28, 2011]
Blaize
Cross Country Rider

OVERALL
RATING
4
VALUE
RATING
4
Strength:

Price... Even new, the price is pretty good for a mountain bike of reputable quality. It's also upgradable. The bike is built like a tank. I've been ragging on mine for several years now and have done some pretty intense riding with it, and it is still holding together with the original components.

Weakness:

Weight... this is largely due to the front fork and rims. I have upgraded the rims to something lighter and replaced the pedals with shoes... I'll probably upgrade the fork to something lighter in the near future.

A solid bike for a beginner/amateur with plenty of room to grow.

Similar Products Used:

Gary Fisher Marlin

[Aug 15, 2011]
joel
Cross Country Rider

OVERALL
RATING
2
VALUE
RATING
2
Strength:

everything but the tires and shifting

Weakness:

Tire rims, gear shifting

This bike is good on the highway. Other than that it is not related for trails. Did a little 180 spin and bent the rim on the bike and i havent even had it for a month sadly. I recommend this bike just for highways. The bike shifts ok it sometimes does skip but doesn't do it to often.

Similar Products Used:

na

[Jun 24, 2011]
AWDfreak
Weekend Warrior

OVERALL
RATING
2
VALUE
RATING
3
Strength:

The frame stays in one piece

Weakness:

Everything else

If you want to get serious about mountain biking, avoid the 3-series at all costs. A 4300 is more suitable if you want to get into mountain biking.


Otherwise, the best a 3-series such as the 3900 will be good for is the occasional light trail use, but mostly paved bike path use.

For those who simply ride casually once in a while. I'm ashamed to call it a mountain bike with the components it has. Most ambitious and adventurous kids will outgrow this bike quickly.

Similar Products Used:

crappy Chinese bikes from department stores

[Dec 01, 2010]
CHANCE B
Weekend Warrior

OVERALL
RATING
5
VALUE
RATING
5
Strength:

Frame, disc brakes, shifters

Weakness:

Handle bars, fork, pedals, rear derailleur

This is a great entry level bike. I have flat out abused this bike for 3 weeks now and have only had to replace the bars. It does have week components, but I didnt purchase the bike expecting it to perform on the same level as a thousand dollar bike. I bought it to get me started, and I plan on upgrading to better components as the factory ones wear out. All in all you cant ask for much more for the money.

[Sep 27, 2010]
Robbio7
Weekend Warrior

OVERALL
RATING
3
VALUE
RATING
5
Strength:

Strong Frame, Smooth, Cheap, Upgradeable platform.

Weakness:

Handle Bars, Stem, Grips are terrible. Rear Derailleur. Seat post slides down a lot.

I have had this bike for 5 years now, I have been riding it abusively as a trail rider for 2 years now. This thing is a battle tank. I did a good bit of modification to it because i can. I love this bike and the only reason for not using it anymore is i am riding a 29er now. This is a great bike for a beginner and will last through some abuse. I am 5'10" and 180 lbs, but the bike would fit someone 6'0" like a glove. I highly recommend new grips and a lighter and shorter replacement for both the stem and handlebar.

[Aug 28, 2010]
Matt
Cross Country Rider

OVERALL
RATING
3
VALUE
RATING
4
Strength:

The Al frame.

Weakness:

Components, weak fork.

I've been riding my road bike primarily for the last few years and a friend I ride with started to get into single track. I had hoped to find a cheap, decent bike with a broken fork or some other damage that i could fix easily. As it turned out, someone traded this bike to my brother for some work he did. He cannibalized the front wheel, handlebar, tires, and seat. I told him my plan and he gave what was left to me.

I was lucky enough to have an old front wheel from my 820 that I used as a stop-gap, found a used 620mm straight bar for 15 bucks, NOS (2009) BB7s for 44 dollars, a Deore RD-M770 for 60, and someone who would trade my wheels for a set of disc wheels that were on a non-disc bike that he was giving away. So, so far, this bike has cost virtually nothing for the quality that I'm left with. I plan on sinking a fair amount of money into a model year or two NOS fork of some kind very soon and it should be about perfect for what I want to do with it.

So that is a major advantage of this bike. If it can be had for very little money, it can be upgraded fairly easily! The stock rear derailleur is a crappy acera; when I had it off road the chain would slap like crazy and I even had it leap gears. since the frame can accept disc brakes, I replaced the cheap, cheap V brakes and it stops like a champ now. The front fork is also very weak on the 2007 model that I have (Spinner Grinder 1... I can't even find documentation for this POS) and it bottoms out on virtually anything I do (keep in mind that I have a road bike that i use for just about any road-like riding).

Now it shifts and stops like a dream and after I get a fork it should be ideal for anything but racing (it is not a very light bike). It's already been a blast for single track.

So, would I recommend it? If you have the money for something better, get it. But if you don't get this and upgrade as you go! If you can get one for free (or very nearly) grab it up and take advantage of the frame. In short, I recommend it, but my recommendation is heavily qualified.

Similar Products Used:

Trek 820, Y33

[Jun 22, 2010]
Shredder
Cross Country Rider

OVERALL
RATING
4
VALUE
RATING
4
Strength:

A good solid bike. If you like hitting the trails a lot but don't really have the budget, this is the bike for you. The fork is good for light trails but it tends to bottom out when the trail gets nasty. The tires are pretty good for both the road and dirt. The bike was actually designed pretty well and most of the components on the bike will definitely do if you are not looking for top performance. If you want to bring out the bike's potential, you might want to consider shelling out an additional $200 or so for upgrade parts.

Weakness:

It's a little heavy for a hardtail. I have a full suspension bike that is a little lighter than this. That says a lot considering hardtails are supposed to be lighter. I have the white version of this bike and dirt sticks to it like anything but that's the price I get for getting anything white, right? Stock brakes are pretty bad so you might want to replace them with at least entry level Shimano brake calipers and discs like the Non-Series BR-M416. That will definitely help with the braking.

It's a pretty good bike. The stock shifters did a pretty good job until I decided to upgrade. The stock brakes are pretty bad. poor stopping power and I constantly had to adjust the setup. I think I would have been better off with rim brakes considering how bad the Promax disc brakes were. I decided to replace the braking system with an entry level hydraulic system from Shimano. That made all the difference. Braking power is fantastic and modulation is all there. Next project is to lighten up my front end by replacing the stock handlebar and stem to carbon fiber parts and perhaps replace the stock suntour front suspension to something with hydraulics. Bottom line is that if you want to get a good bike on a budget, this is the one for you. Shell out and additional $200 for upgrades and I can guarantee that you will be a very happy camper.

Similar Products Used:

Mongoose, Cannondale, Merida and Giant entry level bikes.

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