Trek 3900 Disc XC Hardtail

4/5 (3 Reviews)
MSRP : $569.99


Product Description

Hit the trails or own the streets on a bike that’s meant for you. Front suspension, knobby tires… the trail awaits.
  • Frame: Alpha White Aluminum w/semi-integrated head tube, bi-oval down tube w/integrated gusset, rack & fender mounts, disc compatible dropouts, replaceable derailleur hanger
  • Front Suspension: SR Suntour XCT w/coil spring and preload, 100mm travel
  • Wheels: Formula alloy DC20 front hub, Shimano alloy M475 rear hub; Bontrager 550 36-hole rims w/brushed sidewalls
  • Shifters: Shimano EF51, 8 speed


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Reviews 1 - 3 (3 Reviews Total)

User Reviews

Overall Rating:4
Value Rating:4
Submitted by Rob a Weekend Warrior

Date Reviewed: March 31, 2013

Strengths:    Light weight, sturdy frame, good components for beginners.

Weaknesses:    gears, forks

Bottom Line:   
I have owned mine for approximately 7 months and have ridden it fairly hard on trails and the road, I am overall satisfied with the bike. I just recently upgraded the forks to Rock Shox XC 32's which is my first set of Rock Shox. You can tell a huge difference in the ride. I have had issues with having to adjust my gears several times due to the mud and wear and tear.

Expand full review >>

Favorite Trail:   germany

Duration Product Used:   2 months

Price Paid:    $550.00

Purchased At:   retailer

Bike Setup:   all stock, with the addition of the Rock Shox XC 32 suspension forks and Bell odometer.

Overall Rating:3
Value Rating:2
Submitted by Bob Marley

Date Reviewed: August 1, 2012

Strengths:    It's Light Weight

Weaknesses:    Breaks Terrible,Shocks Sucks,The Tires I Wouldn't Trust Cornering At All!

Bottom Line:   
This Bike I Thought Was Cool At First! The 26x2.0 I Hate Them! The Breaks Are Standard Disc Breaks And They Are TERRIBLE!

Overall Rating:5
Value Rating:4
Submitted by lilridgerider a Cross Country Rider from Tucson, AZ, USA

Date Reviewed: January 12, 2012

Strengths:    Frame, handling, light weight.

Weaknesses:    Brakes and the CRAPPY SUNTOUR FORK. Tires aren't good for cornering, you can go down pretty easy

Bottom Line:   
I tried a great deal of bikes before getting this one. It was the lightest in the budget range I had at the time. I am just getting start and am entering a couple of local races. I don't ride it on pavement at all. But after all of the upgrades I made to the front of my bike those parts are worth more than what I paid for the whole bike. But what really matters is that I am pleased with it. And I really am.

I must mention though. about a month and a half of riding and while riding this bike the upper part of the fork came out of the lower casting. This could have broken my neck. I just want people to be aware. I didn't crash this bike very hard or anything or jumped it off anything more than a foot. Be very cautious of the fork. The Trek store warrantied it and they were very good about it. But I don't trust it anymore and that's why I upgraded to a fox float and had to change out the front hub to accommodate the 15mm thru QR.

Expand full review >>

Favorite Trail:   Golder Ranch, 50-yr trail

Duration Product Used:   3 months

Price Paid:    $539.00

Purchased At:   Trek on Ft. Lowell

Similar Products Used:   none worth mentioning

Bike Setup:   Trek 3900 Disc. Upgraded to a Fox Float 32 Fork, Chris King front Wheel Hub, Chris King Headset, swapped the tires for Panaracer XC Pro. Mavic rims. Drivetrain, brakes, and handlebar/stem upgrade next.

Reviews 1 - 3 (3 Reviews Total)

Review Options:  Sorted by Latest Review | Sort by Best Rating


trek 3900 disc w/ bb7

After failing to get my extremely crappy tektro novela brakes to work for me, i have decided to get some respectable brakes so that i can feel safe and confident on the trails. My only concern is if bb7's are compatible with my rotor or if a new rotor can fit on my hub. Can anyone help me out? Thank ... Read More »

trek 3900 disc upgrade

looking to upgrade front fork on the trek 3900 the suntour forks are stating to creak what would be a good upgrade for trail riding and would the new fork recomended be a bolt inRead More »

trek 3900 disc

i have a trek 3900 disc 2 years old looking to get rid of the junk front fork would a rigid be a good replacement mostly trail ridesRead More »

Trek 3900, Promax mechanical disc rubing against brake caliper

I have a 2009 Trek 3900 with the stock Promax mechanical disc brakes. I was rotating the front wheel today inspecting the bike and heard a faint squeling sound. After closer inspection, it looks like the disc is slightly warped and chaffing against the brake caliper upon rotation. It's not a bad/l ... Read More »

Trek 3900 Disc vs. Fisher G2 Advance

Hello everyone, I'm trying to decide on which bike to get. They both are the same price and are very similar, but I'm not too familiar on the components and which are better over the other. Is there any greater advantage to one over the other? [url]http://www.trekbikes.com/us/en/bikes/compar ... Read More »

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