wheelbase
 

what is the right way to figure wheelbase?
axle nut of the steer to axle nut of the last axle
on my wrecker it is 25'' and when I scale up I get 29'2'' or 350''
im thinking I could go longer for the wrecker

Re: wheelbase
 

Thats the way I would work it out ctr front axle to ctr rear axle
As over all length would be front of the vehicle to rear of the vehicle

Cheers Tracy

Re: wheelbase
 

I could be wrong but I think it is measured from the front axle to the center on the tandems(trunion). That's the way it was measured on the 850 KW's anyway. I thought it was measured from the front to rearmost axle and had to redo my frame length twice because it was too short!lol

Re: wheelbase
 

Reg is correct, steer axle center line to rear suspension centerline.

Re: wheelbase
 

so the rear leaf spring pivot nut

Re: wheelbase
 

Yep that will work:D

Re: wheelbase
 

yes sir ;)

Re: wheelbase
 

on a 3 axle semi tractor .....center of front axel to center of tandems.

Re: wheelbase
 

what about with a lift axle in the mix?

Re: wheelbase
 

The lift axle wont make a diference it is to the center of the drive axle or axles.

Re: wheelbase
 

I could be wrong but I think you measure a wheel base from the center of the front axle to the center of the rear most axle. Ed

Re: wheelbase
 

Yes you're wrong. :p :)

Center of steer to center of tandems.

If it were tri drive? I'm not sure. But likely still center of rear two axles.

Re: wheelbase
 

I think it's confusing but it might help to look at this site, http://www.cdxetextbook.com/safetyIn...aswhlbase.html hope it helps.
Bo

Re: wheelbase
 

I like this explanation or what it's called....Wheelbase
Manufacturers advertise wheelbase according to the distance from the center hub of the steer axle, to the center-point between the two rear wheels on a three-axle truck. So, stick a ruler vertically in the ground right in between the two rear tires, and measure from there to the steer axle. However, possibly more relevantly, officials at the DOT take literally the simplistic technical definition of "wheelbase," which is "the distance between the front steering hub and the rear wheel hub." So, when it comes time to pay tickets for bridge length permit violations, wheelbase measures from the center of the last wheel. Otherwise, advertised wheelbase is from the center of the two wheels, or from the hub of the center axle on a four-axle truck.

Re: wheelbase
 

Bo they call that axle spacing

Re: wheelbase
 

cabs
OK......so what is the difference ? they talk about wheelbase but mean axle spacing ?! even more confusing !?

Re: wheelbase
 

"If it were tri drive? I'm not sure. But likely still center of rear two axles".

The wheel base is always measured to the center of the main drive axle suspension.

Re: wheelbase
 

well ill ask the nypd motor carrier who is scaling me now!!
how we do it.

Re: wheelbase
 

In the manufacturing arena, axle spacing would be the distance between the center line of the drive axles in the case of a truck and the "spread" of the axles on a multiple axle trailer. If you've heard of a trailer suspension referred to as a three nine, that just means 3 axles 9 feet apart. This used to be popular with steel haulers.

As far as what the DOT does...... well that's a whole new ball game :cop: :lol:

Re: wheelbase
 

There is a kind of explanation on the model magazine forum, scroll down 1/3
and look at the picture. http://www.modelcarsmag.com/forums/t...bius-lonestar/ It's funny to see that nobody or everybody knows what is the right or wrong method is :D And DOT in each country does not make it easier either exception is lurking around.

Re: wheelbase
 

It depends on where you live and what MTO or DOT that you deal with.....



Wayne

Re: wheelbase
 

Ok, if you are ordering a tractor whether a tandem or tri-axle wheelbase is always measured from the center of steer axle to center of rearmost axles. middle of rear tandem. When you are getting a dot inspection or ordering a oversize load permit they want axle spacings which you measure center of steer to center of each hub. This pertains to the entire USA. May be different in another country but wouldn't think so

Re: wheelbase
 

Hey bo if you spec a truck like that it would be a little short, you gotta go in between axles to accurately measure or order a truck but that would be how to order a single axle

Re: wheelbase
 

Hey cabs.
I am not trying to spec a truck. Just wondering how and what rules there is out there.
I am curious like bigford is

Re: wheelbase
 

I know just trying to give the best explanation I can. I have a big part in our truck orders and all I do is oversize loads. I read that post and saw how he wrote it was incorrect, just trying to point out how its done. dot goes by whats called axle spacings for length truck dealers will go by wheel base. Just trying to help point you in the right direction

Re: wheelbase
 

Awesome cabs.
Iv'e operated trucks and construction equipment for 30 years.
And when you think you know the rules some smarta$$ change it all.
The best thing i did was to start haul oversized loads all over europa. permit is a good thing when a good office handle them. and it's so technical so not even the polis understand it all. 15 years not one ticket. :cop:

Re: wheelbase
 

thats great, now you have no choice. You get tickets when 99.9 percent is right. Its such a frequently asked question about wb and axle spacings. Hope that helped

Re: wheelbase
 

Yes sir.
I'm done 1/1 hauling going for RC Truck Hauling in the future.....no:cop:there yet :lol:

Re: wheelbase
 

center steer to middle of the rears gives my
wheel lift truck a 342" wheelbase

Re: wheelbase
 

The only thing the cops actually look at on the over sized permits is the routes,

Re: wheelbase
 

Really, since when. I wish that was a fact here. Anytime they pull you in to do a full dot with a super load they break out the tape. NY PA and MD for sure. I got my permit yanked on 9w in Newburgh NY with a crane for being 3" off on my steer to lift axle last year.

Re: wheelbase
 

hauling oversized is no joke any more!!! i was hauling a wide track
excavator with out a escort this cop ripped me apart for 4" overhang on both sides of the trailer
i had strobes flags

Re: wheelbase
 

Seriously,, I guess they just dont bother us as much because we are a utility,, They dont check anything on us

Re: wheelbase
 

they wont bug your company out of respect...