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Periscope Torpedo

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  • MSRP - $4695.00

    *Price of bike pictured may vary due to included options.

    This tandem is ideal for getting your young child started cycling early, yet can stick with your family as your child grows and take you places you never imagined.


    Co-Motion exclusive zonally-butted steel tubing
    Choose from 26” or 700c wheel size

    Dual disc brakes and Shimano Ultegra kit

    Hand built Velocity Dyad/DT Swiss 540 wheels

    Beautifully equipped, versatile tandem that fits nearly anyone

    Shave up to 2.75 lbs with our Torpedo 700c Performance package

    Periscope Torpedo Specifications

  • Frame: Handbuilt frame with zonally-butted cro-moly steel tubing
  • Fork: Co-Motion Taper Gauge w/ CNC Tandem Steerer
  • Derailleurs/Shifters: Shimano Ultegra 6703 Triple
  • Brakes: TRP Spyre w/ 203mm Rotor
  • Headset: FSA Orbit
  • Drivetrain: FSA Gossamer Tandem cranks; 11-32t 10spd cassette
  • Cockpit: FSA Omega captain bar & stem; Co-Motion Stoker bar & stem
  • Saddle/Post: Selle Italia X1 & X1 Lady, Co-Motion 29.8
  • Wheels: Velocity Dyad/Aeroheat Rims; DT Swiss DT540 Tandem Hubs
  • Tires: Continental Gatorskin 700x28mm
  • Geometery

    PeriScope Torpedo 700c
    Frame Size48.5 x 30cm50 x 30cm51.5x30
    Front Seat Tube C-T (cm)48.55051.5
    Rear Seat Tube C-T (cm)303030
    Front Top Tube Length (cm)54.556.558.5
    Rear Top Tube Length (cm)72.472.472.4
    Head Tube Angle73°73°73°
    Fork Rake (mm)505050
    Front Seat Tube Angle74°73°73°
    Rear Seat Tube Angle74°73°73°
    Top Tube Angle14°15°16°
    Head Tube length (mm)165185205
    Chainstay Length (cm)43.843.843.8
    BB Height (cm)272727
    BB drop (mm)727272
    Standover Height, front (cm)74.175.677.4
    Standover Height, rear (cm)55.956.156.5
    Wheelbase (cm)174.2175.1177.1
    Fork Span (mm)390390390
    PeriScope Torpedo 26"
    Frame Size46 x 28cm46 x 28cm
    Front Seat Tube C-T (cm)4646
    Rear Seat Tube C-T (cm)2828
    Front Top Tube Length (cm)5255
    Rear Top Tube Length (cm)7070
    Head Tube Angle71.5°71.5°
    Fork Rake (mm)4545
    Front Seat Tube Angle74°74°
    Rear Seat Tube Angle74°74°
    Top Tube Angle14°14°
    Head Tube length (mm)165165
    Chainstay Length (cm)43.843.8
    BB Height (cm)2727
    BB drop (mm)5252
    Standover Height, front (cm)7272
    Standover Height, rear (cm)54.254.2
    Wheelbase (cm)171.4174
    Fork Span (mm)375375

    Periscope Torpedo Configurator

    Total $

    Opaque PPG Global System Paint Options

    Also known as non-metallic, or solid colors. Strong rich colors for a traditional look.

    Metallic And Mica PPG Global System Paints

    Tiny metallic or mica particles reflect light and add showroom depth and shine.


    House of Kolor Pearlescent Paint Options

    Pearl or opalescent particles in the paint add subtle beauty and a distinctive look to your Co-Motion’s finish.


    Gear Ratios




    • By Andrew H on Sunday July 22nd, 2012 at 9:44pm

      We’ve been on a Periscope since 2005—I think ours was one of the earliest 700c Periscopes to come off the line.  It was a big investment for us at the time, but it has been worth every penny.  I’ve had both of my kids and my wife as stokers over the years, and the bike has adapted seamlessly to their different sizes/weights/power outputs.  About the only thing I’ve had to go out of my way to deal with was making up some custom low-profile crank shorteners for the little legs of my 5-year-old.
      The bike itself handles predictably and safely under just about any conditions.  I recommend the 700c wheels over 26” unless you are absolutely certain you will be off-road much of the time—the bigger wheels definitely help with speed and handling.

      This bike has allowed me to combine my hobby (cycling) with my family time, in a way that has made all of our lives better.  Very pleased to recommend the Periscope.  Looking forward to many more years on ours.

    • By Tai Lee on Wednesday January 25th, 2012 at 12:44pm

      The Periscope has been fantastic.  There are a lot of different options out there for bringing your kid along for a ride and we probably have them all: trailers, seats (front and rear), tow along “third-wheel” bikes, etc.  Riding a tandem is the best way to teach your kids (or anyone for the matter) how to be a cyclist…pedaling along at the same pace without the stress of keeping up and the boredom of just sitting around.  “Third-wheel” bikes are cumbersome and hamper handling so badly that it’s just not an enjoyable long-ride option, especially for the parent.  Every time my boy grows another inch, I just raise the saddle a bit.  Right now, we’re using the crank extender kit attached to the telescoping segment, but I can’t wait for him to get bigger!

    • By Bill on Tuesday December 20th, 2011 at 9:29pm

      Santa is bringing us a Ferrari Red (aka “Santa’s Sleigh) Periscope Torpedo this year.  Very excited to start riding with our kids.

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    Options for your Co-Motion Periscope Torpedo


    Performance Package

    Pathfinder Package

    Thudbuster Seatpost Upgrade

    Nickel Headtube Badge

    Frame Padding Kit

    Tubus Tara Front Rack

    Tubus Cargo EVO Rear Rack

    Co-Pilot Travel Case (2 Cases)


    Make your Torpedo airline-checkable by adding couplers to your frame. Option does not include travel cases or padding kits, sold separately.

    • Price - $1350

    Performance Package

    Includes Co-Motion Carbon Disc Tandem Fork, Gates Carbon Drive timing belt system, Rolf Prima Tandem Disc wheelset.

    • Price - $1095

    Pathfinder Package

    Light up your pathway and get off the grid with the Schmidt SON generator hub, Schmidt Edelux high-powered headlight, and USB port to charge your GPS, Smart phone or other device. Note: Not available when choosing Performance Pkg.

    • Price - $595

    Thudbuster Seatpost Upgrade

    Give your stoker a smoother ride.

    • Price - $140

    Nickel Headtube Badge

    A touch of classic elegance.

    • Price - $20

    Frame Padding Kit

    The full tandem padding kit covers every painted part of your frame.

    • Price - $139

    Tubus Tara Front Rack

    The best low-rider front rack available.

    • Price - $120

    Tubus Cargo EVO Rear Rack

    Outstanding load-carrying capability, rigidity and strength. Periscope models require the Xtra Long rack stays.

    • Price - $160 (includes long struts for compact frame)

    Co-Pilot Travel Case (2 Cases)

    Designed to protect your Co-Pilot frame and travel with ease. You'll need two for your tandem.

    • Price - $790