Bike Comparison
    520 Disc2020 Trek
    Recommended
    Checkpoint ALR 42025 Trek
    MSRP
    		$1,679$1,799
    Where to Buy
    —
    $1

    At

    $1,799

    At Trek

    $1,799

    At Biloxi Bicycle Works

    Category
    		GravelGravel
    Weight
    		7.2 lbs (frame)21.6 lbs
    2.7
    3.0
    Frame
    		SteelAluminum
    Fork
    		AluminumCarbon
    Wheels
    		AluminumAluminum
    Wheel Size
    		700c700c
    Brakes
    		Mechanical DiscMechanical Disc
    Groupset
    		Alivio, SoraApex
    Drivetrain
    		3 × 91 × 11
    Brand Site

    trekbikes.com

    trekbikes.com

    Summary
    		The Trek 520 Disc is a steel frame gravel bike with mid-range components and mechanical disc brakes.
    Similar Bikes
    Accessories
    Ride Feel

    Based on frame geometry and build specs.

    Rider Position
    relaxedaggressive
    Terrain
    smoothrugged
    2020 520 Disc
    2025 Checkpoint ALR 4
    Other Gravel 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)

    38 mph

    2020 520 Disc

    31 mph

    2025 Checkpoint ALR 4

    Highest gear

    (descending)

    Spec Level

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

    Geometry
    Specs
    520 Disc2020 Trek
    Checkpoint ALR 42025 Trek
    Frame

    Trek butted chromoly disc touring, rack & fender mounts, 135x5mm QR

    300 Series Alpha Aluminum, tapered head tube, Internal cable routing, 3S chain keeper, T47 BB, rack and fender mounts, integrated frame bag mounts, flat mount disc, 142x12mm thru axle

    Fork

    520 alloy disc touring, rack mounts, 100x5mm ThruSkew

    Checkpoint, full carbon, tapered carbon steerer, rack mounts, fender mounts, flat mount disc, 12x100mm thru axle

    Bottom Bracket

    SRAM DUB, T47 threaded, internal bearing

    Headset

    1-1/8'' threadless, sealed cartridge bearings

    Stem

    Size: 48, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 80mm length; Size: 51, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 90mm length; Size: 54, 57, Bontrager Elite, 31.8mm clamp, Blendr compatible, 7 degree, 100mm length; Size: 60, 63, Bontrager Elite, 31.8mm clamp, Blendr compatible, 7 degree, 110mm length

    Size: 49, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 70mm length; Size: 52, 54, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 80mm length; Size: 56, 58, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 90mm length; Size: 61, Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 100mm length

    Handlebar

    Size: 48, Bontrager Comp VR-C, alloy, 31.8mm, 100mm reach, 124mm drop, 40cm width; Size: 51, 54, Bontrager Comp VR-C, alloy, 31.8mm, 100mm reach, 124mm drop, 42cm width; Size: 57, 60, 63, Bontrager Comp VR-C, alloy, 31.8mm, 100mm reach, 124mm drop, 44cm width

    Size: 49, Bontrager Elite Gravel, 38cm width; Size: 52, Bontrager Elite Gravel, 40cm width; Size: 54, 56, Bontrager Elite Gravel, 42cm width; Size: 58, 61, Bontrager Elite Gravel, 44cm width

    Saddle

    Bontrager Evoke

    Size: 49, 52, Bontrager Verse Comp, steel rails, 155mm width; Size: 54, 56, 58, 61, Bontrager Verse Comp, steel rails, 145mm width

    Seatpost

    Size: 48, Bontrager alloy, 27.2mm, 12mm offset, 250mm length; Size: 51, 54, 57, 60, 63, Bontrager alloy, 27.2mm, 12mm offset, 330mm length

    Bontrager alloy, 27.2mm, 12mm offset, 330mm length

    Pedals

    Wellgo nylon body, alloy cage

    Groupset
    Rear Derailleur

    Shimano Alivio M4000, long cage, 36T max cog

    SRAM Apex 1, long cage, 42T max cog

    Front Derailleur

    Shimano Sora R3030, 34.9mm (w/28.6 adapter) clamp

    Crank

    Size: 48, 51, Shimano Alivio T4060, 48/36/26, 2-piece w/chain guard, 170mm length; Size: 54, 57, 60, 63, Shimano Alivio T4060, 48/36/26, 2-piece w/chain guard, 175mm length

    Size: 49, SRAM Apex 1, 40T, DUB Wide, 165mm length; Size: 52, SRAM Apex 1, 40T, DUB Wide, 170mm length; Size: 54, 56, SRAM Apex 1, 40T, DUB Wide, 172.5mm length; Size: 58, 61, SRAM Apex 1, 40T, DUB Wide, 175mm length

    Shifters

    Size: 48, 51, 54, 57, 60, 63, Shimano Sora R3000, 9 speed; Size: 48, 51, 54, 57, 60, 63, Shimano Sora R3030, 3 speed

    SRAM Apex, 11 speed

    Cassette

    Shimano HG200, 11-36, 9 speed

    SRAM PG-1130, 11-42, 11 speed

    Chain

    KMC X9

    SRAM PC-1130, 11 speed

    Brakes

    TRP Spyre C 2.0 mechanical disc, 160mm rotor

    Tektro C550 mechanical disc brake, dual piston, flat mount

    Wheels
    Rims

    Bontrager Affinity Disc, Tubeless Ready, 36-hole, 21mm width, presta valve

    Bontrager Paradigm, Tubeless Ready, 24-hole, 21mm width, Presta valve

    Spokes

    14g, stainless steel, silver

    14g stainless steel, black

    Front Hub

    Shimano M475, 6-bolt disc, 100x5mm QR

    Bontrager alloy, sealed bearing, centerlock disc, 100x12mm thru axle

    Rear Hub

    Shimano M475, 6-bolt disc, 135x5mm QR

    Bontrager alloy, sealed bearing, centerlock disc, Shimano 11-speed freehub, 142x12mm thru axle

    Tires

    Bontrager H1 Hard-case Ultimate, 700x38c w/reflective sidewall

    Bontrager GR1 Team Issue, Tubeless Ready, Inner Strength casing, aramid bead, 120 tpi, 700x40mm

    Disc Rotors

    Tektro, centerlock, 160mm

    Accessories
    Racks

    Size: 48, 51, 54, Bontrager BackRack Deluxe, Interchange compatible, size small; Size: 48, 51, 54, 57, 60, 63, Bontrager Carry Forward; Size: 57, 60, 63, Bontrager BackRack Deluxe, Interchange compatible, size large

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