I had noticed that during a couple of rides on the Tandem lately with our new Rolf Disc wheels that the front felt like it was flexing a bit more than the old set. So I checked the spoke tension and it appeared the non disc side was considerably looser than the disc side. So I contacted Rolf and sent them this picture per their request.
Here is their response.
From: Ethan Stehley <firstname.lastname@example.org>
To: Joe Lucchio <email@example.com>
Sent: Thu, January 27, 2011 12:51:04 PM
Subject: RE: Front tandem disc wheel spokes loose
Thanks for the photos. Looking at them it looks like you have our “older” lacing pattern. We have an updated “new” lacing pattern(Elbows in disc side) that allow us to gain an estimated 20-30% tension on the non disc side. We updated our production with this new lacing pattern as of late 2010 so your 2008/2009 wheel would have been laced with the older pattern. I have you set up under RA#01273. Please mark the outside of the box with this number and we will take care of the rest.
Sorry for any inconvenience and thanks for your patience.
780 Bailey Hill Road
Eugene, OR 97402
So out of curiousity I checked my rear hub and it was laced the same way - without alternating the spoke head on the inside and outside of the hub. As shown in this pic.
Since I have to send the front back - I figured I'd check to make sure that this was correct for the rear - my first thought is that it isn't but spoke tension is high and it doesn't appear to be a problem. So I asked Rolf and here was their response - which doesn't make sense to me.
The lacing pattern on your rear wheel was not changed for the same reason as the front. Please send back only the front wheel and not the rear as there is no problem with the lacing pattern on you 2009 Rear wheel. The lacing pattern on the Drive Side was flip flopped to prevent the spokes from crossing at the round portion near the head of the spoke. If we were to relace your wheel you will not have adequate clearance between your Derailleur and spokes.
As you can clearly see - the spokes do cross at the round portion near the head of the spoke.
Looking at this picture from their website of the 2010 Tandem wheels - it appears that spokes on the front and rear alternate on both sides of the hub.
I haven't heard back yet - but I don't think the rears are laced correctly either.