Wheel lug nut size

[robert9999]

Went to the storage yard to do a repack of the bearings & discovered I didn’t have a socket to fit the wheel. Jayco provided me with 3 tire irons one for the stabilizer jacks (19 mm) one larger iron ,which I assumed was for the lug nuts,, & s smaller size one which I assume is for the electric tongue manual override if the motor dies. The large iron was also a 19mm as it turns out & my socket set I brought along had a 19mm socket as the largest I carried for the past 3 years in case I got a flat! Luckily
I found out now before getting stuck somewhere.

[robert9999]

Oh it’s a 25 BH Travel Trailer Jayco

[RogerR]

Here is another fun fact, your spare is probably a different size from the wheels.. At least on mine it was. I carry an X bar with 4 sizes and it fits both plus a socket for my 24 inch breaker bar that I use for my Andersen Hitch.
You might add the year and weather it is a Baja model and/or the tire size.

[tabber02]

3/4” and 19mm are the exact same size, in the event you have a 3/4” socket (or wrench) you’re set.

[DonaandDon]

On my last 5r. the socket you used needed to be a thin wall deep well to fit between the wheel casting the lug nut. And the Better make it a six point too. All other will round off or split the socket. Don't ask me how I know...