Bike Comparison
    MSRP
    $2,099$2,099
    Where to Buy
    $1

    At

    $1

    At

    Category
    GravelGravel
    3.5
    3.7
    SteelSteel
    Fork
    SteelSteel
    Wheels
    AluminumAluminum
    Wheel Size
    650b / 700c650b / 700c
    Clearance
    42c (700c) / 50c (27.5″)47c (27.5″) / 45c (700c)
    Brakes
    Mechanical DiscHydraulic Disc
    Groupset
    RivalGRX 400, GRX 600
    Drivetrain
    1 × 112 × 10
    Brand Site

    surlybikes.com

    allcitycycles.com

    Summary
    The Surly Midnight Special is a steel frame gravel bike with upper 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 Midnight Special
    2023 Space Horse GRX
    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)

    31 mph

    2020 Midnight Special

    36 mph

    2023 Space Horse GRX

    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

    4130 CroMoly, double-butted main triangle, ED coated, TIG-welded

    Tire Clearance42c (700c) / 50c (27.5″)

    612 Select Chromoly Steel, TIG Welded and Brazed, E.D. Coated

    Tire Clearance42c (700c) / 50c (27.5″)

    Fork

    4130 CroMoly, ED coated, TIG-welded

    612 Select Chromoly Steel, All-City Signature Fork ends and Crown, TIG Welded and Brazed, E.D. Coated

    Bottom Bracket

    SRAM GXP

    Shimano BSA

    Headset

    Cane Creek 40, 1-1/8"

    Cane Creek 40 Series

    Stem

    ProMax, 31.8, 4 bolt

    AL6061, 3D forged, 4-bolt stem, 31.8mm, ±6° Rise

    Handlebar

    Salsa Cowbell 31.8

    AL6061, 31.8mm, 12° Flair

    Saddle

    WTB Volt 142

    All-City Gonzo -OR- DDK-5255

    Seatpost

    Promax, ProMax SP-2019 27.2x300mm non-offset (for 40-50), ProMax SP-2016 27.2x300mm offset (for 54-64cm)

    27.2mm, two-bolt, 350mm length

    Groupset
    Rear Derailleur

    SRAM Rival 1

    Shimano GRX RX400, 10-speed

    Front Derailleur

    n/a

    Shimano GRX RX400

    Crank

    SRAM Rival 1, 40t

    Shimano GRX RX600, 46/34t

    Shifters

    SRAM Rival 1

    Shimano GRX RX400

    Cassette

    SunRace 11-42t

    MicroSHIFT, 11-32t

    Chain

    KMC X11

    KMC X10 EPT

    Brakes

    TRP Spyre, 160mm rotors

    Shimano GRX RX400

    Brake Levers

    SRAM Rival 1

    Shimano GRX RX400

    Wheels
    Rims

    Alex Adventurer 2 with eyelets, tubeless ready

    WTB ST i19, TCS 2.0, 32h, 650b (43cm~61cm)

    Front Hub

    Novatec 12x100mm

    All-City Go Devil, 32h, 6-bolt

    Rear Hub

    Novatec 12x142mm

    All-City Go Devil, 32h, 6-bolt

    Tires

    WTB Horizon 650bx47mm, TCS Folding, tan side wall

    Teravail Rampart, 650bx47mm, 60tpi, Light & Supple, Tan Wall (43cm~61cm)

    Disc Rotors

    Shimano RT26, 160mm, 6-bolt

    Riders Also Compared