GT  Aggressor Comp Mountain Bike - 2021

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Explore more of the greatest outdoors with the lightweight GT Aggressor Comp mountain bike, featuring a strong and durable aluminum frame for casual off-road discoveries.

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Features

  • Whatever path you choose, the 80 mm Suntour suspension fork absorbs bumps and obstacles for a comfy ride on rough terrain
  • Strong and durable aluminum frame features forged dropouts with disc brake mounts
  • X Guides keep cables tucked away and tidy
  • 21-speed (3 x 7-speed) thumb tap shifting system offers smooth and precise adjustability when pedaling uphill or accelerating on level ground
  • Tektro mechanical disc brakes and knobby WTB tires offer consistent control on a variety of terrain in a variety of weather
  • Closeout
  • NOTE: Specs and images are subject to change based on component availability

Imported.

This bike comes with Coast to Coast Support, which includes:
  • 1 year of free adjustments (see more below)
  • In-store bike assembly
  • Pickup in store or curbside
  • Bike experts available at 170+ bike shops
REI Co-op Members get more:
  • 20% off shop services
  • Free tubes with purchase of flat tire repair (Co-op Cycles brand tubes only; tube must be installed at time of purchase)
More about our free adjustments:
New bikes go through a normal break-in period, after which they should be readjusted. All bicycles sold at REI include free adjustments for one year after purchase date—as many times as you need. Included: derailleur and brake adjustments, lateral wheel truing, hub and headset bearing adjustments, tire inflation and chain lubrication. Not included: replacement or installation of new components or accessories, any other services. Call your local REI Co-op Bike Shop for more information.

View all GT Hardtail Mountain Bikes

Technical Specs

Best Use

Mountain Biking

Mountain Bike Style

Trail

Frame

GT 6061 T6 aluminum Triple Triangle with floating seatstays; zero stack 1-1/8 in. head tube

Bike Suspension

Front Suspension

Fork

SR Suntour XCT, 80 mm, coil

Fork Travel

80 millimeters

Crankset

Prowheel alloy, 42/34/24T

Bottom Bracket

Cartridge, square taper

Shifters

39-8, 3 x 7-speed

Front Derailleur

microSHIFT FD-M20M

Rear Derailleur

microSHIFT RD-M26C

Rear Cogs

14-34T, 7-speed

Number of Gears

21 gear(s)

Brake Type

Mechanical Disc Brake

Brakes

Tektro Mech Disc Brakes, 160/160 mm Rotors

Brake Levers

Tektro Mech Disc Brakes

Rims

WTB SX19, 32 h

Front Hub

Alloy disc, 100 mm quick-release

Rear Hub

Alloy disc, 141 mm quick-release

Wheel Size

27.5 inches

Tires

WTB Ranger Comp, 27.5/29 x 2.25 in., DNA Compound

Tire Width

2.25 inches

Handlebar Shape

Riser Bar

Handlebar

GT All Terra alloy riser, 25 mm rise, 8 deg. sweep, 6 deg. rise, 720 mm width

Stem

GT All Terra, 6061 alloy, 31.8 mm, 8 deg.

Seat Post

GT All Terra 2-bolt alloy

Saddle

GT MTB

Pedals

GT Slim Line Flat pedal

Headset

Semi-integrated, sealed cartridge

Chain

KMC Z7, 7-speed

Weight

Unavailable

Gender

Unisex

Size Chart

GT Bikes (212694, 212695)
SML
Reach404243.9
Stack57.558.459.4
Seat Tube Center-Top424650
Standover Height73.275.778.2
Head Tube Length121314
Head Tube Angle (degrees)686868
Seat Tube Angle (degrees)73.573.573.5
Bottom Bracket Height31.531.531.5
Wheelbase109.9112.3114.6
Chainstay444444
Fork Offset4.24.24.2

Sizing Notes

Measurements are stated in centimeters unless otherwise indicated.

How we measure bikes

  1. Standover Height Standover Height is a measurement from the ground to the top of the top tube, measured at the midpoint of the top tube.
  2. Reach Reach is the horizontal distance from the center of the cranks to the center of the head tube, measured at head tube level.
  3. Stack Stack is the vertical distance from the center of the cranks to the center of the head tube, measured to the top of the head tube.
  4. Effective Top Tube Effective top tube is the distance from the center of the head tube to the center of the seat tube/seat post, measured parallel to the ground.
  5. Seat Tube Center to Top Seat Tube length is the measurement of the seat tube, from the center of the cranks to the top of the seat tube.
  6. Head Tube Length Head Tube Length is measured from the bottom to the top of the head tube.
  7. Head Tube Angle Head Tube Angle is the acute angle between the head tube and the ground (measured towards the rear of the bike)
  8. Seat Tube Angle Seat Tube Angle is the acute angle between the seat tube and the ground (measured towards the rear of the bike).
  9. Bottom Bracket Height Bottom Bracket Height is a measurement taken vertically from the ground up to the center of the cranks.
  10. Wheelbase Wheelbase is the measurement from the center of the front axle to the center of the rear axle.
  11. Chainstay Length Chainstay Length is the measurement from the center of the cranks to the center of the rear axle.
  12. Fork Offset Fork Offset, or rake, is the distance from the front axle to a line drawn parallel to the center of the head tube or steering axis.

Buying Advice

A person riding a mountain bike hits a dirt jump and is shown in air.

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