Per the UB Special sales brochure:
Total weight with 12-38 tires and no extra equipment is
Type U - 5450 lbs
Type E - 5800 lbs
Type N - 5450 lbs
They are about 200 lbs heavier than the gas models.
What's interesting is that the UBD brochure lists the weight for Type U at 5550 lbs.