Interesting. I can't find the MX5400/6000 manual online, but did find the 4800/5200. I'll assume the 5400/6000 is similar.
The 4701 R4 rims can be set to 49.2in, 53.5in, 54.7in, and 59.1in from center of tread to center of tread. The 5200 can be set to 51.6in, 55.9in, 58.1in, and 61.2in. So...