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
  • Handbuilt touring wheels
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
  • 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.




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