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Old 10-23-2008, 01:37 PM   #1
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Default 1.9 ruling call

I have a question about this part of the USRCRC rule...

Quote:
2.4.2 - Vehicle track width is limited to a maximum of 8 inches. This is determined by measuring bottom of the outer most edge of the front and rear tires while the vehicle is sitting on level ground.
So, this could be taken 2 ways in my mind. Are we talking about line "A" or line "B"?.....

Click the image to open in full size.

Line "A" is the edge of the contact patch between the tire and the ground. Line "B" is the outer edge of the tire.



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Old 10-23-2008, 01:46 PM   #2
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Line B
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Old 10-23-2008, 01:54 PM   #3
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I thought the track width was actually measured from the center of each contact patch? (or is that just for the 1:1? For setting toe in/out)

Last edited by 2JSC; 10-23-2008 at 02:00 PM.
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Old 10-23-2008, 01:58 PM   #4
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Line B, widest point including tire bulge.
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Old 10-23-2008, 02:03 PM   #5
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Quote:
Originally Posted by Grizzly4x4 View Post
Line B, widest point including tire bulge.

Thank you
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Old 10-23-2008, 02:07 PM   #6
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Quote:
Originally Posted by Eritex Inc. View Post
Thank you

That's how it been measured at Nats every year on 2.2's.
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Old 10-23-2008, 02:52 PM   #7
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as they said line B
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Old 10-23-2008, 03:10 PM   #8
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OK, Then to further complicate it, What if part of the wheel is wider than the tire buldge? For example if the wheel nut protrudes past the tire buldge.
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Old 10-23-2008, 03:24 PM   #9
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It says tires.

"This is determined by measuring bottom of the outer most edge of the front and rear tires"
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Old 10-23-2008, 04:08 PM   #10
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ok build a box that is 8" wide and see if your truck fits inside.
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Old 10-23-2008, 04:29 PM   #11
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Quote:
Originally Posted by 2JSC View Post
ok build a box that is 8" wide and see if your truck fits inside.
That would work but you would have to set the truck on a flat surface first, then slide tha box over the rig.
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Old 10-23-2008, 04:33 PM   #12
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Yes, making sure that the tires don't rub.
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Old 10-23-2008, 05:00 PM   #13
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Quote:
Originally Posted by Rockpiledriver View Post
That would work but you would have to set the truck on a flat surface first, then slide tha box over the rig.

It would not work if this is true. As the wheel nut and or part of the wheel could be wider than the 8" track width

"This is determined by measuring bottom of the outer most edge of the front and rear tires"
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Old 10-23-2008, 06:18 PM   #14
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Quote:
Originally Posted by pup View Post
It would not work if this is true. As the wheel nut and or part of the wheel could be wider than the 8" track width

"This is determined by measuring bottom of the outer most edge of the front and rear tires"

Yep I guess you are correct there. You're gonna have to make a tech stick I guess.
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Old 11-06-2008, 08:43 AM   #15
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Quote:
Originally Posted by Rockpiledriver View Post
Yep I guess you are correct there. You're gonna have to make a tech stick I guess.

sorry to bring this thread up again.
so technically axial axles with negative offset wheels would be legal as long as the tire bulge doesn't exceed the 8" mark, correct?

even though the axle nut would be past the 8" mark
(I know this isn't the best setup for crawling but it means being able to run in 2 classes rather than 1)

Thanks
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Old 11-06-2008, 09:59 AM   #16
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Quote:
Originally Posted by engineerjoe View Post
sorry to bring this thread up again.
so technically axial axles with negative offset wheels would be legal as long as the tire bulge doesn't exceed the 8" mark, correct?

even though the axle nut would be past the 8" mark
(I know this isn't the best setup for crawling but it means being able to run in 2 classes rather than 1)

Thanks
Correct. If you can live with the wheel nut sticking out, the measurement is based on the tires only.
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Old 11-06-2008, 10:09 AM   #17
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Quote:
Originally Posted by Grizzly4x4 View Post
Correct. If you can live with the wheel nut sticking out, the measurement is based on the tires only.
thanks
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Old 11-06-2008, 11:09 AM   #18
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Quote:
Originally Posted by Grizzly4x4 View Post
Correct. If you can live with the wheel nut sticking out, the measurement is based on the tires only.
what about rule
3.7 - You cannot run the same vehicle in more than one class.

so with his question the way I read it he is wanting to run 1 truck 2 class's and that is not allowed..
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Old 11-06-2008, 11:32 AM   #19
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Quote:
Originally Posted by sloppy View Post
what about rule
3.7 - You cannot run the same vehicle in more than one class.

so with his question the way I read it he is wanting to run 1 truck 2 class's and that is not allowed..

True rules do state that you should not run the same truck. On the other side of the table it is up with the club to decide what format they run. I for one would not turn a person away if they could only afford one crawler.

Not everybody plans on competing for a Nats invite. If they are, they have to follow the rules.
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Old 11-06-2008, 11:39 AM   #20
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Quote:
Originally Posted by sloppy View Post
what about rule
3.7 - You cannot run the same vehicle in more than one class.

so with his question the way I read it he is wanting to run 1 truck 2 class's and that is not allowed..

I have a scaler with axial trans and axles that I can make a new chassis and links for easily. so it won't be the same truck in both classes.
Just trying to use the parts I have to compete in another class.

The hardest part is going to be modifying the 1.9 wheels to fit these rules, and of course, getting through the course with the axle nuts sticking out so far :-(
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