Originally Posted by bikeinxs
Any thoughts before I place my wheel order?
Be careful: IME the Synergy extrusion is not really up to the rigors of a wide tire at the high pressures needed for tandem. I converted our 700C tandem to Synergy + Grand Bois Hetre, which we run at 80psi (450lb team). We've broken three Synergy rims in less than 12 months riding on occasional gravel roads (mostly roads, probably about 3k miles). The wheels fail by going severely out of true after each ride (need lots of truing every dozen miles) and then eventually the rim cracks at some random time of the day or night (sounds like a gunshot). We have had the same experience with US and Australian-made 36h O/C rims. Our wheels were built by one of the more internet-famous builders of tandem wheels.
Stoker loves this setup and would not consider going back to narrow tires, so we are on Synergy #4 and #5 now (both are fine with <1k miles)
I've enjoyed Synergy rims on my single bikes for many years (and miles), but am looking forward to 36h 650B downhill rims for the tandem (our frame is ready for discs). Considering Pacenti DL31 and Velocity Blunt for next step, but neither is compatible with rim brakes.