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Co-Motion tandem sizing is designed for a wide spectrum of fitting options, and a stronger, lighter and more graceful frame.
WHERE TO START
It's best to put the taller rider up front in the captain's position, while the smaller rider is the best choice for the rear (stoker) position.
PICK A SIZE
Select the tandem size which best fits the captain, and then consider the stoker's fit. Stokers don't need stand-over clearance to achieve a comfortable position, but it's nice to have that clearance if possible.
MAKING A CHOICE
Notice that each of you may fit more than one size. We suggest looking very carefully at one of the most overlooked aspects of bicycle fit:
Make sure the combination of top tube length + stem matches your needs. To fine-tune your fit, we have many choices of front stems and two adjustable stoker stem choices. If you're not sure about your positioning, you may use our fitting guide and request assistance.
CHOOSE CRANK LENGTHS
Make sure you get the right crank length. Co-Motion offers tandem cranksets in several lengths to fine tune the fit to your needs. Check your model's specs for crank length information.
Our PeriScope tandems change many things we've come to accept about sizing. No matter what kind of fitting problems you may have had with other tandems, a PeriScope tandem will likely fit you to a "T".
TAKE THE EDGE OFF
Suspension seatposts: Deduct 2.5" (64mm) from the low end of the inseam range to allow room for the Thudbuster ST seatpost. Other suspension posts may require more room.
SEE THE SPECS FOR EACH MODEL
Our full range of tandem models has a broader range of sizes than ever before. Please look carefully at the model or models you're considering. We list geometry for each size of every tandem in both the quick view tab and complete downloadable pdf specs.