Like rcmass stated you CAN get into ATV trails, but if you are in the National Forrest, their regulation states 50". some places have very little enforcement but that doesn't make it legal.
I know trails in my area we can get away with but illegal use can carry $5000 fine, confiscation of the ATV and confiscation of the tow vehicle. We do it anyway sometimes, but know the risk.
The RAZR is designed to meet the National Forrest Service Regs in both width and weight.
Many National Forrests post specific regulations for each forrest on their respective websites. These regs are being updated more often right now. The BLW usually has less restrictions, but they are under pressure to more specifically regulate.
There are a lot of places to operate the Rhino and with difficult trials and sections, I like the rhino for my use better, but if using ATV trails is the best option in your area, you might consider if the RAZR will work, so far it is legal.