Correct. But it’s worth noting that I haven’t replaced the belt or sprockets on my tandem… ever! Still working as new some 25,000km later.

In other words when the time comes to replace the belt, it’s very likely that the sprockets will also need replacing?

I’ve found that they wear pretty evenly.

Alee thanks for the reply. I could not see the pilot’s eccentric hub, and that would be a major difference. I was really scratching my head on how you did it to the co-motion when I saw the same rear drop outs as mine has. Fortunately we have a couple great frame builders in Philly (incl. Bilenky) so I will have to evaluate costs with them. I’ll share your Surly build with them for guidance. What a great ride that co-motion must be…. – thanks!

Hi Tom. My Co-Motion tandem came from the factory with a break in the seatstay (for the belt), an eccentric bottom bracket (to tension the belt) and with Rohloff-specific dropouts (to fasten the internally geared hub). For your tandem to get the same setup, you’d need to get some significant modifications made to your frame. It’s possible, but expensive. I did these same modifications to a Surly LHT about five years ago: https://www.cyclingabout.com/alexs-touring-bike/ Alee