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    TAMBORA A42025 Polygon
    Recommended
    MSRP
    $1,799
    Where to Buy
    —
    $1

    At

    Category
    		Gravel
    4.1
    Frame
    		Aluminum
    		Carbon
    Wheels
    		Aluminum
    Wheel Size
    		700c
    Clearance
    		45c
    		Shimano GRX 600 Hydraulic Disc
    		GRX 800, GRX 600
    Drivetrain
    		2 × 11
    Brand Site

    polygonbikes.com

    Summary
    		The Polygon TAMBORA A4 is an aluminum frame gravel bike with high-end components and shimano grx 600 hydraulic disc brakes.

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    Insights
    Ride Feel

    Based on frame geometry and build specs.

    Rider Position
    relaxedaggressive
    Terrain
    smoothrugged
    TAMBORA A4
    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

    TAMBORA A4

    Highest gear

    (descending)

    Spec Level

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

    Geometry
    Specs
    TAMBORA A42025 Polygon
    Frame

    aluminum

    BB Standard: BSA, 68mm, Threaded

    Tire Clearance: 45c

    Color: Charcoal - Blue

    Fork

    CARBON RIGID

    Bottom Bracket

    BSA, 68mm

    Headset

    TOKEN TK156SP-36 W/ SEALED BEARING, ZS 56/28.6 | ZS 56/40

    Stem

    Polygon Expert, 90 mm (S, M) / 100 mm (L, XL), 31.8 mm Clamp, 7° Rise

    Handlebar

    POLYGON EXPERT, W: 420mm (S, M) / 440mm (L, XL), BB: 31.8mm, R/D: 125mm, B/R: 77mm

    Saddle

    LINC FLUX 2

    Seatpost

    POLYGON EXPERT, DxL: 27.2x400mm

    Type: Rigid

    Grips

    Bar Tape

    Groupset
    Rear Derailleur

    SHIMANO GRX RD-RX810

    Front Derailleur

    Shimano GRX FD‑RX810, 11‑Speed

    Crank

    PROWHEEL RPZ C701X TT, 48-31T

    Shifters

    SHIMANO GRX ST-RX600, 2x11-SPEED BRIFTER

    Cassette

    SHIMANO CS-HG700, 11-34T

    Chain

    KMC X11

    Brakes

    SHIMANO GRX HYDRAULIC DISC

    Type: Shimano GRX 600 Hydraulic Disc

    Brake Levers

    SHIMANO ST-RX600

    Wheels
    Rims

    F: ALLOY DOUBLE WALL FV H: 20 622 32H TLR / R: ALLOY DOUBLE WALL FV H: 20 622 32H TLR

    Spokes

    F: STAINLESS 14G NDS:290 & DS:292 W/ NIPPLE BRASS / R: STAINLESS 14G NDS:292 & DS290: W/ NIPPLE BRASS

    Front Hub

    NOVATEC D791SB 12x100mm 32H CL

    Rear Hub

    NOVATEC D792SB 12x142mm 32H CL FOR SPROCKET

    Tires

    MAXXIS PURSUER 700X32C

    Disc Rotors

    SHIMANO RT-CL700, 160mm

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