Exterior Length Question

[jagermeister]

Is there any 'rule of thumb' for determining a trailer's living quarters length from the published exterior length? Basically, is there a standard tongue length used for a majority of trailers, specifically the hybrids?

I've been doing a lot of research and like the Coachmen 21tqx model. I assumed the box length was 21' from the model name. However, I'm now doubting that. The exterior length is listed as 22'7". It would seem as if the tongue length has to be greater than 1'7" which means the box length isn't 21' but less? Coachmen also has another hybrid model named the 22DSX with a published exterior length of 22'2", so I'm thinking their model numbers don't correspond to the trailer box lengths.

I came across the Surveyor SC-224T which I like. It's exterior length is listed as 22'7" and from the model # I'm assuming the box is 22' in length? That would leave 2'7" of tongue length which seems more realistic to me.

So, does the exterior length minus about 2.5' or so seem about right to determine box length? Or is it all over the board?

I'm really surprised that manufactures don't list the living area length. I'm trying to figure all this out to compare apples to apples in regards to length versus weights.

Thanks.

[bikendan]

there is no consistency in model numbers vs. box length vs. total length, in the RV Industry.
some manufacturers do match model number and box length but some don't.

my advice is to never rely on the model number for the length of anything.

[donanddona]

Blueprints are unheard of also...

[parpar1]

My "30 footer" is 32 feet LOL Almost screwed me on parking in my driveway.

[jevanb]

Originally Posted by bikendan

there is no consistency in model numbers vs. box length vs. total length, in the RV Industry.

True, mine is a 344 but is 38.9 overall

[heavynlori]

Our 325RES is 37 ft from tip of nose to outside of back bumper

[BradinOhio]

Our 30WRKSS is 34'7" total overall length..

[Campin Cajun]

jag....the best thing you can do is take a measuring tape with you when you go RV shopping and take the measurements yourself. Like everyone else has said the numbers don't mean the length. And I would not trust the numbers printed in the brochures.

Don't forget about the height either.