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  • 6061 aluminum frame is tough without handling like a tank; geometry offers up a responsive, comfortable ride quality
  • SR Suntour XCT-MLO suspension fork provides 80mm of travel to smooth out of rough trails, roots and rocks
  • Drivetrain features 24 gears that are guided by Microshift Tab trigger shifters and Shimano derailleurs for fast shifting on the go
  • Promax mechanical disc brakes ensure easy speed management, even in muddy and wet conditions
  • Replaceable rear derailleur hanger helps extend the usable life of the frame
  • Specs on the GT Aggressor 1.0 hardtail mountain bike are subject to change


All bicycles sold at REI include a free warranty tune-up. New bikes go through a normal break-in period, after which readjustment is important for longevity and performance. Bring your new bike in to your local REI for its free tune-up within 20 hours of use or 6 months from purchase, whichever comes first. Contact your nearest REI bike shop to schedule this important service.

View all GT Hardtail Mountain Bikes

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Best Use Mountain Biking
Frame 6061 aluminum
Bike Suspension Front Suspension
Fork SR Suntour XCT MLO, 80mm travel
Crankset Forged alloy, 42/34/24
Bottom Bracket Cartridge sealed
Shifters Microshift Tab
Front Derailleur Shimano
Rear Derailleur Shimano Acera
Rear Cogs Sunrace, 11-34, 8-speed
Number of Gears 24 gear(s)
Brakes Promax DSK-310 mechanical disc
Brake Levers Promax
Rims Alex Ace 24
Front Hub Alloy, 32h
Rear Hub Alloy, 32h
Wheel Size 26 inches
Tires All Terrain, 26 x 2.0
Handlebar Shape Riser Bar
Handlebar MTB Riser
Stem Alloy Ahead
Seat Post Alloy micro adjust
Saddle GT MTB
Pedals GT Slimline Flat platform
Headset Ahead
Chain KMC Z72
Weight Unavailable
Bike Weight Bike weight is based on median size, as sold, or the average of two median sizes.
Gender Unisex
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