Bike Comparison
    MSRP
    $749$579
    Where to Buy
    $1

    At

    $579

    At Trek

    Category
    CrosscountryCrosscountry
    Weight
    32.2 lbs
    3.5
    2.4
    AluminumAluminum
    Fork
    Suntour XCMSuntour XCE
    Wheels
    Aluminum
    27.5″27.5″ / 29″
    Brakes
    Hydraulic DiscMechanical Disc
    Groupset
    Deore, AceraTourney, Altus
    Drivetrain
    3 × 92 × 7
    Suspension
    HardtailHardtail
    Front Travel
    100mm100mm
    Brand Site

    gtbicycles.com

    trekbikes.com

    Summary
    The GT Avalanche Comp is a 27.5″ aluminum frame hardtail crosscountry bike with mid-range components.
    Similar Bikes
    Accessories
    Ride Feel

    Based on frame geometry and build specs.

    Terrain
    easyextreme
    Handling
    nimblestable
    2024 Marlin 4 Gen 2
    Other Crosscountry bikes
    Gear Range

    A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

    Lowest gear

    (climbing)

    33 mph

    2018 Avalanche Comp

    22 mph

    2024 Marlin 4 Gen 2

    Highest gear

    (descending)

    Spec Level

    Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.

    Geometry
    Specs
    Frame

    All New 6061 T6 Aluminum Frame, w/ Triple Triangle? Replaceable Derailleur Hanger, Disc Brake Mounts, and Zerostack tapered 1 1/8-1 1/2Head Tube, 27.5/29 Design

    Size: XS, S, Alpha Silver Aluminum, curved top tube, internal routing, chainstay disc brake mount, rack and kickstand mount, 135x5mm QR; Size: M, ML, L, XL, Alpha Silver Aluminum, internal routing, chainstay disc brake mount, rack and kickstand mount, 135x5mm QR

    Fork

    SR Suntour XCM-HLO w/ 100mm Travel, Steel Stanchions, Aluminum Leg, Post Mount Disc Brake, Hydraulic Lockout, QR, For 27.5 or 29

    Travel100mm

    Spring TypeCoil

    Size: XS, SR Suntour XCE 28, coil spring, preload, 42mm offset for 27.5'' wheel, 100mm QR, 80mm travel; Size: S, SR Suntour XCE 28, coil spring, preload, 42mm offset for 27.5'' wheel, 100mm QR, 100mm travel; Size: M, ML, L, XL, SR Suntour XCE 28, coil spring, preload, 46mm offset for 29'' wheel, 100mm QR, 100mm travel

    Travel100mm

    Spring TypeCoil

    Bottom Bracket

    VP Cartridge Sealed

    VP BC73, 73mm, threaded cartridge

    Headset

    Intergrated seal bearing, 1-1/8? UPPER + 1-1/2? LOWER

    Semi-integrated, 1-1/8''

    Stem

    All Terra 1 1/8" Threadless, 4-Bolt W/ CNC Face Plate, 10? Rise for 27.5; 5? Rise for 29, 31.8mm Clamp

    Size: XS, S, Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 50mm length; Size: M, Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 60mm length; Size: ML, L, Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 70mm length; Size: XL, Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 80mm length

    Handlebar

    6061 Aluminum Riser, 680mm Width, 12mm Rise, 31.8mm Clamp, Double Butted

    Size: XS, S, Bontrager alloy, 31.8mm, 5mm rise, 690mm width; Size: M, ML, L, XL, Bontrager alloy, 31.8mm, 15mm rise, 750mm width

    Saddle

    All Terra MTB

    Bontrager Verse Short, stainless steel rails

    Seatpost

    All Terra Alloy Micro-Adjust, 30.9mm

    Size: XS, S, Bontrager alloy, 31.6mm, 12mm offset, 330mm length; Size: M, Bontrager alloy, 31.6mm, 12mm offset, 360mm length; Size: ML, L, XL, Bontrager alloy, 31.6mm, 12mm offset, 400mm length

    Pedals

    GT Slim Line Flat Nylon Pedal

    VP-536 nylon platform

    Grips

    GT Statement

    Bontrager XR Endurance Comp, lock-on

    Groupset
    Rear Derailleur

    Shimano, Deore, RD-M592-SGS

    Shimano Tourney TY300

    Front Derailleur

    Shimano Acera, FD-T3000

    Shimano Altus M315, 34.9mm clamp, top swing, dual pull

    Crank

    All-Terra V-401, 44/32/22T

    Size: XS, S, M, ProWheel TM-CY10, 36/22, 170mm length; Size: ML, L, XL, ProWheel TM-CY10, 36/22, 175mm length

    Shifters

    Shimano Alivio, SL-M4000

    Size: XS, S, M, ML, L, XL, Shimano EF500, 8 speed; Size: XS, S, M, ML, L, XL, Shimano EF500, 7 speed

    Cassette

    Sunrace CS-M98, 11-36T, 9-Speed Cassette

    Shimano TZ500, 14-34, 7 speed

    Chain

    KMC Z99

    KMC Z7, 7 speed

    Brakes

    (F) Shimano BR-M315, Hydraulic Disc, W/ 160mm Rotor SM-RT26, (R) Shimano BR-M315, Hydraulic Disc, W/ 160mm Rotor SM-RT26

    Size: XS, S, M, ML, L, XL, Tektro MD-M280 mechanical disc; Size: XS, S, M, ML, L, XL, Tektro MD-M281 mechanical disc

    Brake Levers

    Shimano Hydraulic Disc Brake Lever

    Wheels
    Rims

    All Terra Double Wall, 32H 27.5/29, disc specific

    Front Hub

    (F) Alloy Disc hub, W/ Quick Release, (R) Alloy Cassette Disc hub, W/ Quick Release

    Tires

    All Terra Cypher, 30tpi, 27.5/29X2.10" (F/R)

    Disc Rotors

    Tektro, 6-bolt, 160mm

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