In reply to the recommendation of using threaded rod. This is a great idea, and I do use it on one of my setups for transporting in the van. Being a rear dropout, I believe I used 3/8 rod, hex nuts inboard and wingnuts outboard.

Our travel case is a BikePro style soft / padded bag with the steel rail. I purchased an optional rear dropout holder that has adapters for the dropouts and uses a quick release to secure it.

I had purchased the ebay XT releases based on them being said to be for 145mm. If not, I'm not out a ton of money. Just trying to know for certain.

FWIW, our Co-Mo does have Salsa releases securing the wheels. I'm hoping to find XT's for the off road tandems. XT's have always worked well on my singles and I cant recall a wheel slipping with an XT. Styles like the Salsa use a plastic washer in crush. I have never used Salsa releases off road, but have had other similar styles slip and shift the wheel on technical singletrack. The Salsa's on the Co-Mo road tandem work very well.

I'll give a call to Shimano next week and see if they have the description of that PN.

PK