Tires will measure differently depending how wide your rim is, how much pressure you have, etc, so let's not get carried away thinking that 37s that only measure 35" are only 35s. Your drivetrain will feel the difference.. Besides, tire size is relative.. There are certainly bigger 35s and smaller 35s, but I'd still just call them all 35s at the end of the day.
And BFGs run notoriously small
My ride- 2001 power wheel, 11" plastic tires, upgraded battery, boat sides, custom bumpers, tow hooks, new paint.