I just did mine... I used a 1 5/16 and it worked perfect. I am, however, potentially having issues with the new assembly. I would recommend buying a high quality replacement, not the cheap one I bought from Advance Auto for about $100 (Made in China).
I replaced mine a couple of weeks ago, and used a 34 mm loaner from Autozone.
That said, I also purchased the new wheel bearing from Murray'*. It is as SKF bearing with a lifetime warranty for around $145. They also sold an SKF bearing with a one year warranty for $125. My guess is that it is the same hub and bearing and I just paid for the warranty. SKF has been around 100 years and is a very good bearing company.