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Scale Comp Rules

Mriswith

Rock Crawler
Joined
Dec 31, 2005
Messages
602
Location
Mesa
The most current Scale rules I've found is HERE and is dated 2008 in the last post. If anyone has any other national type rules set, post up. I'm wanting to build something new but I also want to keep it within national level rules for those us who go to other club venues.

Lets just get this out of the way first so no one misunderstands my intent. I not looking to change any rules, just looking for group consenus on some interpretations or what other clubs use for the specifics. I don't care too much about about the actual competition events like reverse or roll-overs, ect.., just vehicle specs and maybe gate width. The linked rules specify a minimum of 12 inches but no max. For example that gives my Sniper about 3/8's of inch clearance at the minimum. Hence the possible new build.

Whatever I build will 2.2 and probably fall into the "tuber" vehicle catagory as far as specs go, but I can live that. The hard part for me will be the 'Street Legal' aspect.

So anyway, my first question is about this one:

Wheelbase and width is limited only by your body, but it must fit within the body’s fender wells.

Wheelbase I get. As long as it matches your body, cool. Be 8 inches or 22, as long as it mates up to the body, your good.
The Width or track width is my question. There isn't a limit on the scale rules because it's left up to whatever body you run, like wheelbase. USRCCA spells out track width as an outside to outside measurement and thats fine, we can go with that even though it's not the dictionary defination. We can measure from widest part of the fender to the outside edge of the tire. How far out can the tire be and still be considered '..Modeled after modified but street legal off-road vehicle'? I've not seen a street legal off-road vehicles who's tire's didn't stick out past fenders. So I'm looking for a few IDEA'S or SUGGESTIONS as to what we'd consider a measurement.
 
dang i just cut my fenders on the jeep and now the tires stick out so that means i cant run it anymore. thats a tough one i guess i dont care its just like the tuber thing some places you cant run them. i guess for here its fine and those of us that go to a comp out of state will have to change stuff to follow the rules.
 
I seen an Avalanche just the other day. It had big fender flares and the tires were still sticking out half way from them. I had a big old 68' 3/4 ton Ford when I was younger and had 35/12.50's on it and they were half in half out of the fender openings.

I think as long as half the tire is underneath the body it should be legal....

As far as track width I was always told that it is measured from center to center on the tires....
 
Street legal?

Scale to me is something based off a real 1:1 truck weather it be a tuber or full bodied truck.
During the jeep safari in moab there will be full on comp trucks driving down the road.
Also what do you consider street legal, it differs from state to state, and there are some state's that all a vehical has to do is move under it's own power to be street legal.
Just something to consider.
 
On a full fender body, I like the wheel up to 1/2 outside the fender depending on the body/wheel package. My Sniper needs maybe 1/8 of the wheel inside the side body. Thats what the 1:1 I copied it from had, but it's not a street legal vehicle.

I'll stick 3/4 of the outside the fender and put some mud flaps on. That makes it legal like most places don't it?
 
I'll just have to finish a few goodies, like ND tags, on the Sniper and register it as a Class 3 Off-Hiway vehicle.

As per ND Dept of Transportation


39-29-01. Definitions.
As used in this chapter, unless the context otherwise requires:

...
c. Class III off-highway vehicle weighs less than eight thousand pounds, travels
on four or more tires, has a seat and a wheel for steering control, and is
designated for or capable of cross-country on or over land, water, sand, snow,
ice, marsh, swampland, or other natural terrain, unless registered by the

department under chapter 39-04.


--Where can an individual operate an off-highway vehicle?
An individual may operate a registered off-highway vehicle on a gravel, dirt or loose surface roadway, on a paved highway designated and posted at a speed not exceeding fifty-five miles (88.51 kilometers) per hour.


A licensed driver over 16 years of age may operate a registered Class III off-highway vehicle on a paved highway designated and posted at a speed not exceeding sixty-five miles (104.61 kilometers) per hour. The Class III off-highway vehicle must be equipped with mirror (39-37-09), horn (39-27-15), speedometer and odometer (39-27-16), brake light (39-27-17.1), lighted headlamp (39-27-17.1), and 350 cubic centimeter motor or greater.


I just have to remember to put a plate on the front and rear :lol:​
 
...

I think as long as half the tire is underneath the body it should be legal....

That's my preference, well fender anyway. I'm just kinda thinking about chassis's like the Poison Spider Jeeps. I think on those it's waiverable. Everyone knows those tires are supposed to stick way out. I guess a person just has to keep in mind full width axle swaps on narrow bodied vehicles like Jeeps, Landcruiser and Toyota for example


...
As far as track width I was always told that it is measured from center to center on the tires....

I agree. Thats the text book/dictionary and the way I was always taught, but it's defined differently in the USRCCA rules. Thats one of those little things that confuses me.


2.3 - Class 2 – Class 2.2
:
If a Class 2 vehicle violates any of the following requirements it must run in Class 1.


2.3.1 - Vehicle wheelbase is limited to a maximum of 12.5 inches. This is determined by measuring
from centerline of front axle stub to centerline of rear axle stub, with all the wheels pointing straight
ahead, with the vehicles suspension holding it's own weight.


2.3.2 - Vehicle track width is limited to a maximum of 12.5 inches. This is determined by measuring
the bottom of the outer most edge of the front and rear tires while the vehicle is sitting on level
ground.

 
That's my preference, well fender anyway. I'm just kinda thinking about chassis's like the Poison Spider Jeeps. I think on those it's waiverable. Everyone knows those tires are supposed to stick way out. I guess a person just has to keep in mind full width axle swaps on narrow bodied vehicles like Jeeps, Landcruiser and Toyota for example




I agree. Thats the text book/dictionary and the way I was always taught, but it's defined differently in the USRCCA rules. Thats one of those little things that confuses me.


2.3 - Class 2 – Class 2.2
:
If a Class 2 vehicle violates any of the following requirements it must run in Class 1.



2.3.1 - Vehicle wheelbase is limited to a maximum of 12.5 inches. This is determined by measuring

from centerline of front axle stub to centerline of rear axle stub, with all the wheels pointing straight
ahead, with the vehicles suspension holding it's own weight.


2.3.2 - Vehicle track width is limited to a maximum of 12.5 inches. This is determined by measuring


the bottom of the outer most edge of the front and rear tires while the vehicle is sitting on level
ground.

USRCCA rules are for comp trucks only, I like the Tamiya MSD Scale Nats rules myself
 
I know. That is the definition of track width by some of the same people who added to the Scale4x4 Nationals rules (which are what I linked) and came up with the MSD scale rules that you refer too. The Scale4x4 rules don't specify track width but the MSD ones do. I read through all the pages of that thread and I couldn't see where they made up their mind as to how it measured. Some said centers and others use the Comp rules method. Thats what my original question was.
 
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