I've seen them as light as 33lbs and as heavy as 44lbs; it all depends. I would think high 30's would be about the average comparison weight for a large size frame. 36ish for a Medium/Small.

Hopefully a few folks will "weigh-in" (so to speak) who have C'dale RT1000 or RT3000's that have actually weighed their bikes.

If you're looking for a little more information on tandem weights, this post from the archives may be of interest: http://www.bikeforums.net/showpost.p...87&postcount=1