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Periscope Hammerhead
Shown in HOK Limetime Pearlescent
You’re a racer, all your bikes are made to go fast, and you want to get your child into the action with you at a young age? The PeriScope Hammerhead is the tandem for you!
Super-light Co-Motion design ACMUltra7, zonally-butted 7005 aluminum frame
Designed to perform, versatile enough to fit young child stokers into adulthood
Larger head tube with internal Chris King Inset headset
Periscope Hammerhead Specifications
Frame: ACMUltra7 7005 Series zonally-butted tubing
Fork: Co-Motion Carbon Tandem Eite
Headset: Chris King InSet 44mm Internal
Brakes: Shimano Dura Ace (front) / Avid BB7, 203mm Rotor (rear)
Crankset: FSA SLK BB30 Carbon Tandem Crankset
Front Derailleur: Shimano Ultegra
Rear Derailleur: Shimano Ultegra
Shifters: Shimano Ultegra STI Triple
Cassette: Shimano XT 11-32 10-speed Cassette
Bars: FSA Gossamer / Co-Motion Stoker
Stem: FSA OS 115 / Co-Motion Adjustable Stoker Stem
Seatpost: Kalloy Uno Seraph 29.8 x 350mm
Saddle: Selle Italia SL Kit Carbonio Flow / Womens SLK
Wheels: Rolf Prima Tandem Wheelset
Tires: Continental Ultra Gator Skin, 700 x 28
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Geometery
| Size | Small | Large |
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| Frame Size | 49 x 30cm | 49 x 30cm | | Front Seat Tube C-T (cm) | 49 | 49 | | Rear Seat Tube C-T (cm) | 30 | 30 | | Front Top Tube Length (cm) | 54.5 | 57 | | Rear Top Tube Length (cm) | 72.4 | 72.4 | | Head Tube Angle | 73° | 73° | | Fork Rake (mm) | 45 | 45 | | Front Seat Tube Angle | 74° | 73° | | Rear Seat Tube Angle | 74° | 73° | | Top Tube Angle | 14° | 14° | | Head Tube length (mm) | 165 | 185 | | Chainstay Length (cm) | 43.8 | 43.8 | | BB Height (cm) | 26.7 | 26.7 | | BB drop (mm) | 73 | 73 | | Standover Height, front (cm) | 75.3 | 75.3 | | Standover Height, rear (cm) | 56.3 | 56.3 | | Wheelbase (cm) | 173.5 | 174.9 | | Fork Span (mm) | 374 | 374 |
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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.

Options for your Co-Motion Periscope Hammerhead
Thudbuster Seatpost Upgrade
By MB on Monday June 27th, 2011 at 11:25am
Bought my 2007 Hammerhead to ride with my then 7-year-old son. Our goal was to keep up with moderately fast group rides and this tandem has lived up to its performance promise. We have since put 8000 miles on the bike including fast group rides, centuries, and a multi-day supported tour. This bike handles superbly, accelerates and climbes well, and inspires confidence on high speed descents. It’s a joy to ride and the time spent cycling with my son has been priceless. The PeriScope tandem is great way to include a child in the world of adult cycling.