E85 nozzles are exactly the same size as E10 and E0 nozzles. That is why there are labels all over the place on the E85 pumps.
Use that Wikipedia page with a grain of salt. A lot of bad info on there. For example, it lists that ethanol free gas is illegal in Minnesota. Yet there are many retailers selling ethanol free (non-oxy) 91 octane all over the state. Its labeled for use in collector cars, OPE, boats, and ATV's, but nobody polices it.
Also, not sure how things work in other states, but there is no such thing as off-road gasoline in Minnesota. Doesn't matter what you pay for, you pay road taxes. However, some of that tax money is given to programs like ATV trails, snowmobile trails, etc... Off road diesel is another story... In addition, you can apply for a refund of the tax on gasoline, but it is never sold without the tax.
Guessing in the case of the OP that the hardware from an old diesel pump is being reused. Would work fine with filling gas cans, but not sure what else...