PeriScope Torpedo

The Torpedo features our family-friendly PeriScope design with an emphasis on performance with precision components. ​Easy and quick adjustments fit the widest range of riders of any tandem. Perfect for kids and adult stokers, a bike that truly grows with the family. 

  • Optimized for 700c wheels and 32mm tires
  • Co-Motion zonally-butted cromoly tubing
  • Oversize 44mm head-tube and uni-crown touring fork
  • Proven Co-Motion touring geometry
  • Rack/ fender mounts
  • Dual disc brakes and Shimano 105 Kit
  • Hand built touring wheels
  • Available in two standard colors: Ferrari Red and Medium Blue
Complete bike starting at $3,995.00
Click here to get your Co-Motion PeriScope Torpedo order started!



"The Torpedo is easily the best-handling tandem I’ve ever ridden. Part of the great handling owes to the advantage the PeriScope offers by keeping the stoker’s center of gravity as low as possible. I mean, it also helps that my stoker weighs a whopping 46 lbs, but regardless, the Torpedo carves turns in a way no other tandem I’ve ridden does." Patrick B.



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 105 R7000 GS 2x11-speed
  • Brakes: Avid BB7 w/ 200mm disc rotors
  • Headset: FSA Orbit Z Internal
  • Drivetrain: Co-Motion Compact tandem cranks 50/34t with 11-34t cassette
  • Cockpit: FSA Omega compact and Co-Motion stoker bar / FSA Gossamer and Co-Motion adj. stoker stem
  • Post/Saddle: Co-Motion 29.8mm, PeriScope Seatmast System / Selle Italia X1 & X1 Lady
  • Wheels: Co-Motion A-20 tandem hubs / Alex ATD 490 rims
  • Tires: Continental Ultrasport II 700c x 28mm

PeriScope Torpedo Geometry Table



Frame Size
A - Captain Top Tube (cm)
B - Captain Seat Tube (cm)
C - Stoker Seat Tube (cm)
D - Head Tube (mm)
E - Chainstay (cm)
F - Seat Tube Angle
G - Fork Span (mm)
H - Head Tube Angle
I - Fork Rake (mm)
J - BB Drop (mm)
K - Capt. Standover (cm)
L - Stoker Standover (cm)
M - Wheelbase (cm)
N - Boom Tube (cm)
O - Stack (cm)
P - Reach (cm)
Small Medium Large
54.5 56.5 58.5
48.5 50 51.5
30 30 30
165 185 205
43.8 43.8 43.8
74° 73° 73°
390 390 390
73° 73° 73°
50 50 50
72 72 72
74.1 75.6 77.4
55.9 56.1 56.5
174.2 175.1 177.1
72.4 72.4 72.4
592 611 630
374 378 392


Accessories & Options


Custom Sizing
We have the experience, tools, materials, and knowledge to create the best fitting tandem for a modest charge over the cost of a standard sized tandem.



Co-Pilot Couplers
Strong and secure stainless-steel threaded couplers for steel frames. Fits your Co-Motion bicycle inside an airline checkable travel case. Includes spanner wrench.



Polished Couplers
This time intensive 3 stage polishing process will bring your S&S couplers to a beautiful and durable shiny luster. Available only with the Co-Pilot couplers option.



Max Adjust Stoker Stem
We make our Co-Motion Max Adjust Stoker Stem to provide range from shortest to longest extension to maximize the fitting range of your tandem.



Metal Head Tube Badge
Classic Co-Motion logo metal head tube badge. These can be applied to both tapered and straight head tubes. A great classic look for your new bike.



Lighthouse Badge
Lighthouse antiqued silver badge for straight head tubes. Reminiscent of the Heceta Head Lighthouse on the Oregon coast just 70 miles from the Co-Motion factory.




PeriScope Torpedo Price Calculator

From $3995.00