My 1999 Club Car is 94" tip to tip and 47+3/4" wide with stock wheels and tires.
It is about 750 lbs. If you wanted to put in sideways, you will HAVE to turn it using the open side door. Corner to corner is too long to turn inside the trailer. A Club Car has a perfect X under the cart to place a floor jack if you did want to turn it sideways.
The backseat kit adds about 50 lbs.
With aftermarket wheels and tires, I think it is right at 48" wide.
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Clark