GT Aggressor 1.0 or Trek 3900 D.. Which one to grab??


New Member
Mar 13, 2013
Hi all,

I am confused between two bikes - GT Aggressor 1.0 and Trek 3900 D. The price difference between the two is nearly 90$
GT @ 490$ and Trek @ 580$ (Money is not an issue.. I need quality.)

Since I have no knowledge on the parts attached in it, so please advice the comparison between the two bikes based on the specs mentioned below.

GT Aggressor 1.0

FRAME NEW 6061-T6 Aluminum Triple Triangle Frame, w/ Replaceable Derailleur Hanger, Disc Brake Mounts, and 1 1/8" Head Tube FORK SR Suntour XCT w/ 80mm Travel, QR RIMS Alex Ace 24, Double Wall, 32H HUBS Alloy Disc QR SPOKES 14G Stainless TIRES All Terrain 26X2.00" PEDALS GT Slim Line Flat Pedal CRANKS Suntour XCC T102 42/34/24T BOTTOM BRACKET Cartridge Sealed CHAIN KMC Z72 REAR COGS Shimano CS-HG31-8, 11-32T, 8-Speed Cassette FRONT DERAILLEUR Shimano TX51 REAR DERAILLEUR Shimano Acera, RD-M360 SHIFTERS Shimano EF-51 EZ Fire Plus, 8 Speed HANDLEBAR MTB Riser Bar GRIPS GT Wing w/ Waffle STEM Alloy Ahead HEADSET 1 1/8" Ahead BRAKES Promax Forged Caliper Cable Disc w/ 160mm Rotor BRAKE LEVERS Shimano EF-51 SADDLE GT MTB Saddle SEATPOST Alloy Micro Adjust

Trek 3900D:

Frameset Frame

Alpha Silver Aluminium w/semi-integrated head tube, rack & mudguard mounts, disc compatible dropouts, replaceable derailleur hanger

Front suspension

SR Suntour XCM w/30mm stanchions, coil spring, preload adjustment, 100mm travel


13, 16, 18, 19.5, 21, 22.5"

Wheels Wheels

Formula DC20 aluminium front hub; Formula DC22 aluminium rear hub w/Bontrager AT-650 32-hole double-walled disc rims


Bontrager LT3, 26x2.0"

Drivetrain Shifters

Shimano Altus, 8 speed

Front derailleur

Shimano Altus

Rear derailleur

Shimano Acera


Shimano M171, 42/34/24


Shimano HG31 11-32, 8 speed


Wellgo nylon platform

Components Saddle

Bontrager Evoke 1


Bontrager SSR, 31.6mm, 12mm offset


Bontrager Low Riser, 31.8mm, 15mm rise, 9 degree sweep


Bontrager SSR, 31.8mm, 10 degree


1-1/8" threadless


Tektro Novela mechanical disc w/Shimano Altus levers
if your budget is not a concern then i would buy a trek from a higher level, for example the 4900 series, the 3900 are ok but not great, in fact i had a 3900 and have been upgrading the components and even the frame and fork since,
Your choice is between a company that is among the best to deal with on warranty issues (Trek), and one of the worst (GT).

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