5th wheel measurement vs length

[MJO21]

I am curious how manufacturers measure the length of their units? Do the measure the absolute longest tip to tail of the unit including the hitch nose or do they just count the floor length?

We are getting ready to build a new garage and I want to make sure it is either wide enough or deep enough to get an entire 5th wheel camper in there and close the door. I am wanting 40x40, with the back 10-12feet being about 4 feet lower that the front so I can back in the camper across the back of the garage and not need to have super high walls and a 14' door in the front. Where I am building has a natural slope away from the existing driveway so with the back 10-12' being lower the camper can be backed in across the back without digging it out...

[BB_TX]

If I remember correctly, the length listed in Montana specifications is defined as the length from the center of the king pin to the rearmost part of the rear bumper or of the rear cap as the case may be. Model number has no direct relationship to length.

[toedtoes]

fj12ryder wrote:
There's no reliable relationship between the model number and any measurements. Some work out that way and some don't. The only real way to know the length is to physically measure it. Our model number is a 383 but our outside length is right at 38 feet. A tape measure is your friend.

Our stated length was 38'9" and it measures 38' from the pin to the rear of the trailer.

X2

[fj12ryder]

There's no reliable relationship between the model number and any measurements. Some work out that way and some don't. The only real way to know the length is to physically measure it. Our model number is a 383 but our outside length is right at 38 feet. A tape measure is your friend.

Our stated length was 38'9" and it measures 38' from the pin to the rear of the trailer.

[filrupmark]

Fivers are measured inside and travel trailers are measured outside . ???????????

[newman_fulltime]

DutchmenSport wrote:
My Montana 5er listed measurements and the actual measurements are the same, length 41 feet 6 inches. But the model is 375. What does that mean?

it means walkable space inside the rv is 37.5 ft

[DutchmenSport]

My Montana 5er listed measurements and the actual measurements are the same, length 41 feet 6 inches. But the model is 375. What does that mean?

[stickdog]

Ours is a 36 ft model but exterior dimension is 37 ft pin to rear cap. I call it 38 ft to cover for the ladder.

[newman_fulltime]

model numbers are walking floor length not whole TV length

[toedtoes]

And remember you want to add enough room so you can move things around the trailer, work on the rear of the trailer without hitting the back wall, etc.

[toedtoes]

From what I found, manufacturers don't have a standard way of measuring. Some measure a trailer by the box, some from bumper to hitch, some the box plus bumper...

I would suggest visiting a dealer, finding the longest 5er you can and measuring it from tip to tip for your guide.