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    Medium and Large frames shipping now. Small and XL frames shipping in early summer.


    • Base Build
    • Frame Specs
    • Geometry
    • Tires & Rims
    FrameCarbon with Tuning Chip® dropout system
    ForkLithic full carbon fork, 15mm thru-axle
    HeadsetWolf Tooth Precision Headset
    Rear derailleurShimano 105 GS, 11 speed
    Front derailleurShimano 105, braze-on mount
    ShiftersShimano 105 mechanical, 11 speed
    CassetteShimano 105, 11-32t, 11 speed
    BrakesShimano 105 R7020 Hydraulic
    CranksShimano RS510, 50/34
    Bottom bracketShimano english thread BSA, Ø68mm
    HandlebarLithic Corundum aluminum compact drop with 16° flare
    GripsCork handlebar tape, black
    Stem6061 aluminum
    Seatpost6061 aluminum
    Seatpost ClampWolf Tooth 29.8mm
    SeatWTB, Custom for Otso
    WheelsDT Swiss C 1800 SPLINE, 100x15mm front and 142x12mm rear hub spacing
    TiresTerrene Elwood 700x40 Light
    ChainShimano HG-11X
    Frame SizesS, M, L, XL
    Weight (size M)20.6 lbs (9.3kg) set up tubeless
    Bottom bracket standard68mm BSA threaded
    Q-factor146mm with Shimano 105 crankset
    Maximum chainring size2x 53T round; 1x 50T round or 46T oval
    Front derailleur typeBraze-On, bottom pull
    HeadsetZS44/28.6 upper, ZS56 lower
    Seatpost diameterØ30.9mm
    Seatpost clampØ34.9mm
    Front/rear hub standard100x15mm thru axle / 142x12mm thru axle
    Front/rear axleØ15x100mm front, TP=1.5, TL=15mm / Ø12x180mm rear, TP=1.5, TL=12mm
    Derailleur hangerTuning Chip Right Dropout
    Rear brake (rotor)flat mount (160mm)
    Front brake (rotor)flat mount (160mm)
    Fork axle-to-crown420mm
    Fork offset47mm
    Bare frame weight (M)1024g
    Fork weight (Lithic Hiili 420)490g
    Tire clearance (frame)40mm at 420mm chainstay position, 50mm at 430/440mm chainstay position
    Tire clearance (fork)Max Clearance 29x2.1" (54-622)
    Recommended rider height5'2"-5'7"5'6-5'11"5'10"-6'3"6'2"-6'6"
    Recommended rider inseam29"-32"30"-34"33"-35"34"-37"
    Effective top tube546mm560mm583mm605mm
    Nominal head tube angle71°71.5°71.5°71.5°
    Tuning Chip induced head/seat tube angle change±0.2°±0.2°±0.2°±0.2°
    Head tube length94mm107mm149mm191mm
    Nominal seat tube angle72.5°72.5°72.5°72.5°
    Seat tube length475mm510mm540mm570mm
    Bottom bracket drop68-72mm68-72mm68-72mm68-72mm
    Chainstay length420-440mm420-440mm420-440mm420-440mm
    Wheelbase1008 - 1028mm1015-1035mm1039-1059mm1062-1082mm
    Fork offset47mm47mm47mm47mm
    Rigid fork axle to crown length420mm420mm420mm420mm

    Coming soon