My Masi is a Giramondo (touring bike). Currently,I'm borrowing a 29'r wheel that Giant makes, from my Trek dual sport. The other bike that has had wheel problems.

The 29r dropped in easily but needs shimmed for the disc caliper a smidge. This particular wheel has hole inserts. Which seem to be a thing of the past.

Do I need 36? Well, I weigh 220, and it is a touring bike and, well, roads are crap. I'm erring on the side of toughness here.

Sticking a ruler in the rear of my Trek, I get 135mm.