Depends a lot, I should think, on which parts are carbon and what
generation of technology you have on your bikes. The Burley grabs the
chainstays, does it not? The BOB uses a skewer on the rear dropouts.
They will put tremendous torque and moment on those areas.
but here's the thing: Your carbon road bikes are designed to do
something completely different than tour and they certainly weren't
made to pull trailers. Your carbon bike weighs several pounds less than
a utilitarian steel machine designed specifically for touring. But if you
put a trailer on your carbon bike, the weight savings are meaningless
considering the entire package (you, trailer, contents, bike).
david boise ID
go, ristretto, FCP/AE
"Read the manual."