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    RD42023 Principia
    Recommended
    MSRP
    ($5,816)
    Where to Buy
    —
    $1

    At

    Category
    		Race
    7.3
    Frame
    		Carbon
    		Carbon
    Wheels
    		Aluminum
    Wheel Size
    		700c
    		SRAM Force Hydraulic Disc
    		Force, Force eTap
    Drivetrain
    		2 × 12 Electronic
    Brand Site

    principiabikes.com

    Summary
    		The Principia RD4 is a carbon frame race bike with high-end components and sram force hydraulic disc brakes.

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    Insights
    Ride Feel

    Based on frame geometry and build specs.

    Rider Position
    relaxedaggressive
    Terrain
    smoothrugged
    RD4
    Other Race 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)

    41 mph

    RD4

    Highest gear

    (descending)

    Spec Level

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

    Geometry
    Specs
    RD42023 Principia
    Frame

    Full monocoque carbon

    Colors: Black; Green

    Fork

    Full monocoque carbon

    Headset

    FSA No 42 1 1/8"

    Handlebar

    Ritchey Comp Evo Curve, 420 mm.

    Saddle

    Ritchey Comp Streem

    Seatpost

    Ritchey Comp 2-Bolt Aluminium, 31,6x400mm

    Type: Rigid

    Pedals

    Not included

    Groupset
    Rear Derailleur

    SRAM Force eTap AXS

    Front Derailleur

    SRAM Force eTap AXS

    Crank

    SRAM Force D2 Dub 48/35T

    Cassette

    SRAM Force CS XG-1270 12sp 10-33T

    Chain

    SRAM Force

    Brakes

    Front: SRAM Force hydraulic disc brake, Rear: SRAM Force hydraulic disc brake

    Type: SRAM Force Hydraulic Disc

    Wheels
    Rims

    Miche Reflex DX

    Tires

    Panaracer Race D Evo4 700x28C

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